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Kartik Agaram 2021-01-14 14:03:32 -08:00
parent 232b4a1511
commit 20d6be5240
25 changed files with 970 additions and 686 deletions
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html/baremetal/101screen.subx.html generated
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@ -56,50 +56,52 @@ if ('onhashchange' in window) {
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Primitives for screen control.</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span><span class="subxFunction">pixel</span>: <span class="subxComment"># screen: (addr screen), x: int, y: int, color: int</span>
<span id="L4" class="LineNr"> 4 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L5" class="LineNr"> 5 </span> 55/push-ebp
<span id="L6" class="LineNr"> 6 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L7" class="LineNr"> 7 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L8" class="LineNr"> 8 </span> 50/push-eax
<span id="L9" class="LineNr"> 9 </span> 51/push-ecx
<span id="L10" class="LineNr">10 </span> <span class="subxComment"># ecx = screen</span>
<span id="L11" class="LineNr">11 </span> 8b/-&gt; *(ebp+8) 1/r32/ecx
<span id="L12" class="LineNr">12 </span> 81 7/subop/compare %ecx 0/imm32
<span id="L13" class="LineNr">13 </span> {
<span id="L14" class="LineNr">14 </span> 75/jump-if-!= <span class="Constant">break</span>/disp8
<span id="L15" class="LineNr">15 </span> <span class="subxComment"># bounds checks</span>
<span id="L16" class="LineNr">16 </span> 8b/-&gt; *(ebp+0xc) 0/r32/eax
<span id="L17" class="LineNr">17 </span> 3d/compare-eax-and 0/imm32
<span id="L18" class="LineNr">18 </span> 7c/jump-if-&lt; $pixel:end/disp8
<span id="L19" class="LineNr">19 </span> 3d/compare-eax-and 0x400/imm32/1024
<span id="L20" class="LineNr">20 </span> 7d/jump-if-&gt;= $pixel:end/disp8
<span id="L21" class="LineNr">21 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L22" class="LineNr">22 </span> 3d/compare-eax-and 0/imm32
<span id="L23" class="LineNr">23 </span> 7c/jump-if-&lt; $pixel:end/disp8
<span id="L24" class="LineNr">24 </span> 3d/compare-eax-and 0x300/imm32/768
<span id="L25" class="LineNr">25 </span> 7d/jump-if-&gt;= $pixel:end/disp8
<span id="L26" class="LineNr">26 </span> <span class="subxComment"># eax = y*1024 + x</span>
<span id="L27" class="LineNr">27 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L28" class="LineNr">28 </span> c1/shift 4/subop/left %eax 0xa/imm8
<span id="L29" class="LineNr">29 </span> 03/add-&gt; *(ebp+0xc) 0/r32/eax
<span id="L30" class="LineNr">30 </span> <span class="subxComment"># eax += location of frame buffer</span>
<span id="L31" class="LineNr">31 </span> 03/add-&gt; *0x7f28 0/r32/eax
<span id="L32" class="LineNr">32 </span> <span class="subxComment"># *eax = color</span>
<span id="L33" class="LineNr">33 </span> 8b/-&gt; *(ebp+0x14) 1/r32/ecx
<span id="L34" class="LineNr">34 </span> 88/byte&lt;- *eax 1/r32/CL
<span id="L35" class="LineNr">35 </span> <span class="subxComment"># return</span>
<span id="L36" class="LineNr">36 </span> eb $pixel:end/disp8
<span id="L37" class="LineNr">37 </span> }
<span id="L38" class="LineNr">38 </span> <span class="subxComment"># TODO: fake screen</span>
<span id="L39" class="LineNr">39 </span><span class="Constant">$pixel:end</span>:
<span id="L40" class="LineNr">40 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L41" class="LineNr">41 </span> 59/pop-to-ecx
<span id="L42" class="LineNr">42 </span> 58/pop-to-eax
<span id="L43" class="LineNr">43 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L44" class="LineNr">44 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L45" class="LineNr">45 </span> 5d/pop-to-ebp
<span id="L46" class="LineNr">46 </span> c3/return
<span id="L3" class="LineNr"> 3 </span>== code
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="subxFunction">pixel</span>: <span class="subxComment"># screen: (addr screen), x: int, y: int, color: int</span>
<span id="L6" class="LineNr"> 6 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L7" class="LineNr"> 7 </span> 55/push-ebp
<span id="L8" class="LineNr"> 8 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L9" class="LineNr"> 9 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L10" class="LineNr">10 </span> 50/push-eax
<span id="L11" class="LineNr">11 </span> 51/push-ecx
<span id="L12" class="LineNr">12 </span> <span class="subxComment"># ecx = screen</span>
<span id="L13" class="LineNr">13 </span> 8b/-&gt; *(ebp+8) 1/r32/ecx
<span id="L14" class="LineNr">14 </span> 81 7/subop/compare %ecx 0/imm32
<span id="L15" class="LineNr">15 </span> {
<span id="L16" class="LineNr">16 </span> 75/jump-if-!= <span class="Constant">break</span>/disp8
<span id="L17" class="LineNr">17 </span> <span class="subxComment"># bounds checks</span>
<span id="L18" class="LineNr">18 </span> 8b/-&gt; *(ebp+0xc) 0/r32/eax
<span id="L19" class="LineNr">19 </span> 3d/compare-eax-and 0/imm32
<span id="L20" class="LineNr">20 </span> 7c/jump-if-&lt; $pixel:end/disp8
<span id="L21" class="LineNr">21 </span> 3d/compare-eax-and 0x400/imm32/1024
<span id="L22" class="LineNr">22 </span> 7d/jump-if-&gt;= $pixel:end/disp8
<span id="L23" class="LineNr">23 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L24" class="LineNr">24 </span> 3d/compare-eax-and 0/imm32
<span id="L25" class="LineNr">25 </span> 7c/jump-if-&lt; $pixel:end/disp8
<span id="L26" class="LineNr">26 </span> 3d/compare-eax-and 0x300/imm32/768
<span id="L27" class="LineNr">27 </span> 7d/jump-if-&gt;= $pixel:end/disp8
<span id="L28" class="LineNr">28 </span> <span class="subxComment"># eax = y*1024 + x</span>
<span id="L29" class="LineNr">29 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L30" class="LineNr">30 </span> c1/shift 4/subop/left %eax 0xa/imm8
<span id="L31" class="LineNr">31 </span> 03/add-&gt; *(ebp+0xc) 0/r32/eax
<span id="L32" class="LineNr">32 </span> <span class="subxComment"># eax += location of frame buffer</span>
<span id="L33" class="LineNr">33 </span> 03/add-&gt; *0x7f28 0/r32/eax
<span id="L34" class="LineNr">34 </span> <span class="subxComment"># *eax = color</span>
<span id="L35" class="LineNr">35 </span> 8b/-&gt; *(ebp+0x14) 1/r32/ecx
<span id="L36" class="LineNr">36 </span> 88/byte&lt;- *eax 1/r32/CL
<span id="L37" class="LineNr">37 </span> <span class="subxComment"># return</span>
<span id="L38" class="LineNr">38 </span> eb $pixel:end/disp8
<span id="L39" class="LineNr">39 </span> }
<span id="L40" class="LineNr">40 </span> <span class="subxComment"># TODO: fake screen</span>
<span id="L41" class="LineNr">41 </span><span class="Constant">$pixel:end</span>:
<span id="L42" class="LineNr">42 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L43" class="LineNr">43 </span> 59/pop-to-ecx
<span id="L44" class="LineNr">44 </span> 58/pop-to-eax
<span id="L45" class="LineNr">45 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L46" class="LineNr">46 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L47" class="LineNr">47 </span> 5d/pop-to-ebp
<span id="L48" class="LineNr">48 </span> c3/return
</pre>
</body>
</html>

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@ -56,46 +56,49 @@ if ('onhashchange' in window) {
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># check keyboard for a key</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># return 0 on no keypress or unrecognized key</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxFunction">read-key</span>: <span class="subxComment"># kbd: (addr keyboard) -&gt; result/eax: byte</span>
<span id="L4" class="LineNr"> 4 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L5" class="LineNr"> 5 </span> 55/push-ebp
<span id="L6" class="LineNr"> 6 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L7" class="LineNr"> 7 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L8" class="LineNr"> 8 </span> 51/push-ecx
<span id="L9" class="LineNr"> 9 </span> <span class="subxComment"># result = 0</span>
<span id="L10" class="LineNr">10 </span> b8/copy-to-eax 0/imm32
<span id="L11" class="LineNr">11 </span> <span class="subxComment"># ecx = keyboard</span>
<span id="L12" class="LineNr">12 </span> 8b/-&gt; *(ebp+8) 1/r32/ecx
<span id="L13" class="LineNr">13 </span> 81 7/subop/compare %ecx 0/imm32
<span id="L14" class="LineNr">14 </span> {
<span id="L15" class="LineNr">15 </span> 75/jump-if-!= <span class="Constant">break</span>/disp8
<span id="L16" class="LineNr">16 </span> <span class="subxComment"># var read/ecx: byte = keyboard buffer's read index</span>
<span id="L17" class="LineNr">17 </span> 8b/-&gt; *0x7dcc 1/r32/CL <span class="subxComment"># keyboard-buffer-read</span>
<span id="L18" class="LineNr">18 </span> <span class="subxComment"># var next-key/eax: byte = *(keyboard buffer + ecx)</span>
<span id="L19" class="LineNr">19 </span> 8a/byte-&gt; *(ecx+0x7dd0) 0/r32/AL <span class="subxComment"># keyboard-buffer-data</span>
<span id="L20" class="LineNr">20 </span> <span class="subxComment"># if (next-key != 0) lock and remove from keyboard-buffer</span>
<span id="L21" class="LineNr">21 </span> 81 7/subop/compare %eax 0/imm32
<span id="L22" class="LineNr">22 </span> {
<span id="L23" class="LineNr">23 </span> 74/jump-if-= <span class="Constant">break</span>/disp8
<span id="L24" class="LineNr">24 </span> <span class="subxComment"># TODO: add some instructions in this block to SubX if we ever want to</span>
<span id="L25" class="LineNr">25 </span> <span class="subxComment"># use bootstrap on baremetal programs</span>
<span id="L26" class="LineNr">26 </span> fa/disable-interrupts
<span id="L27" class="LineNr">27 </span> c6 0/subop/copy-byte *(ecx+0x7dd0) 0/imm8
<span id="L28" class="LineNr">28 </span> ff 0/subop/increment *0x7dcc <span class="subxComment"># keyboard-buffer-read</span>
<span id="L29" class="LineNr">29 </span> 81 4/subop/and *0x7dcc 0xf/imm32 <span class="subxComment"># keyboard-buffer-read</span>
<span id="L30" class="LineNr">30 </span> fb/enable-interrupts
<span id="L31" class="LineNr">31 </span> }
<span id="L32" class="LineNr">32 </span> <span class="subxComment"># return</span>
<span id="L33" class="LineNr">33 </span> eb $read-key:end/disp8
<span id="L34" class="LineNr">34 </span> }
<span id="L35" class="LineNr">35 </span> <span class="subxComment"># TODO: fake keyboard</span>
<span id="L36" class="LineNr">36 </span><span class="Constant">$read-key:end</span>:
<span id="L37" class="LineNr">37 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L38" class="LineNr">38 </span> 59/pop-to-ecx
<span id="L39" class="LineNr">39 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L40" class="LineNr">40 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L41" class="LineNr">41 </span> 5d/pop-to-ebp
<span id="L42" class="LineNr">42 </span> c3/return
<span id="L3" class="LineNr"> 3 </span>
<span id="L4" class="LineNr"> 4 </span>== code
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="subxFunction">read-key</span>: <span class="subxComment"># kbd: (addr keyboard) -&gt; result/eax: byte</span>
<span id="L7" class="LineNr"> 7 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L8" class="LineNr"> 8 </span> 55/push-ebp
<span id="L9" class="LineNr"> 9 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L10" class="LineNr">10 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L11" class="LineNr">11 </span> 51/push-ecx
<span id="L12" class="LineNr">12 </span> <span class="subxComment"># result = 0</span>
<span id="L13" class="LineNr">13 </span> b8/copy-to-eax 0/imm32
<span id="L14" class="LineNr">14 </span> <span class="subxComment"># ecx = keyboard</span>
<span id="L15" class="LineNr">15 </span> 8b/-&gt; *(ebp+8) 1/r32/ecx
<span id="L16" class="LineNr">16 </span> 81 7/subop/compare %ecx 0/imm32
<span id="L17" class="LineNr">17 </span> {
<span id="L18" class="LineNr">18 </span> 75/jump-if-!= <span class="Constant">break</span>/disp8
<span id="L19" class="LineNr">19 </span> <span class="subxComment"># var read/ecx: byte = keyboard buffer's read index</span>
<span id="L20" class="LineNr">20 </span> 8b/-&gt; *0x7dcc 1/r32/CL <span class="subxComment"># keyboard-buffer-read</span>
<span id="L21" class="LineNr">21 </span> <span class="subxComment"># var next-key/eax: byte = *(keyboard buffer + ecx)</span>
<span id="L22" class="LineNr">22 </span> 8a/byte-&gt; *(ecx+0x7dd0) 0/r32/AL <span class="subxComment"># keyboard-buffer-data</span>
<span id="L23" class="LineNr">23 </span> <span class="subxComment"># if (next-key != 0) lock and remove from keyboard-buffer</span>
<span id="L24" class="LineNr">24 </span> 81 7/subop/compare %eax 0/imm32
<span id="L25" class="LineNr">25 </span> {
<span id="L26" class="LineNr">26 </span> 74/jump-if-= <span class="Constant">break</span>/disp8
<span id="L27" class="LineNr">27 </span> <span class="subxComment"># TODO: add some instructions in this block to SubX if we ever want to</span>
<span id="L28" class="LineNr">28 </span> <span class="subxComment"># use bootstrap on baremetal programs</span>
<span id="L29" class="LineNr">29 </span> fa/disable-interrupts
<span id="L30" class="LineNr">30 </span> c6 0/subop/copy-byte *(ecx+0x7dd0) 0/imm8
<span id="L31" class="LineNr">31 </span> ff 0/subop/increment *0x7dcc <span class="subxComment"># keyboard-buffer-read</span>
<span id="L32" class="LineNr">32 </span> 81 4/subop/and *0x7dcc 0xf/imm32 <span class="subxComment"># keyboard-buffer-read</span>
<span id="L33" class="LineNr">33 </span> fb/enable-interrupts
<span id="L34" class="LineNr">34 </span> }
<span id="L35" class="LineNr">35 </span> <span class="subxComment"># return</span>
<span id="L36" class="LineNr">36 </span> eb $read-key:end/disp8
<span id="L37" class="LineNr">37 </span> }
<span id="L38" class="LineNr">38 </span> <span class="subxComment"># TODO: fake keyboard</span>
<span id="L39" class="LineNr">39 </span><span class="Constant">$read-key:end</span>:
<span id="L40" class="LineNr">40 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L41" class="LineNr">41 </span> 59/pop-to-ecx
<span id="L42" class="LineNr">42 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L43" class="LineNr">43 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L44" class="LineNr">44 </span> 5d/pop-to-ebp
<span id="L45" class="LineNr">45 </span> c3/return
</pre>
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@ -55,117 +55,121 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/103grapheme.subx'>https://github.com/akkartik/mu/blob/main/baremetal/103grapheme.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxFunction">draw-grapheme</span>: <span class="subxComment"># screen: (addr screen), g: grapheme, x: int, y: int, color: int</span>
<span id="L2" class="LineNr"> 2 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L3" class="LineNr"> 3 </span> 55/push-ebp
<span id="L4" class="LineNr"> 4 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L5" class="LineNr"> 5 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L6" class="LineNr"> 6 </span> 50/push-eax
<span id="L7" class="LineNr"> 7 </span> 51/push-ecx
<span id="L8" class="LineNr"> 8 </span> 52/push-edx
<span id="L9" class="LineNr"> 9 </span> 53/push-ebx
<span id="L10" class="LineNr"> 10 </span> 56/push-esi
<span id="L11" class="LineNr"> 11 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L12" class="LineNr"> 12 </span> <span class="subxComment"># var letter-bitmap/esi = font[g]</span>
<span id="L13" class="LineNr"> 13 </span> 8b/-&gt; *(ebp+0xc) 6/r32/esi
<span id="L14" class="LineNr"> 14 </span> c1 4/subop/shift-left %esi 4/imm8
<span id="L15" class="LineNr"> 15 </span> 8d/copy-address *(esi+0x8800) 6/r32/esi <span class="subxComment"># font-start</span>
<span id="L16" class="LineNr"> 16 </span> <span class="subxComment"># if (letter-bitmap &gt;= 0x9000) return # characters beyond ASCII currently not supported</span>
<span id="L17" class="LineNr"> 17 </span> 81 7/subop/compare %esi 0x9000/imm32
<span id="L18" class="LineNr"> 18 </span> 7d/jump-if-&gt;= $draw-grapheme:end/disp8
<span id="L19" class="LineNr"> 19 </span> <span class="subxComment"># edx = y</span>
<span id="L20" class="LineNr"> 20 </span> 8b/-&gt; *(ebp+0x14) 2/r32/edx
<span id="L21" class="LineNr"> 21 </span> <span class="subxComment"># var ymax/ebx: int = y + 16</span>
<span id="L22" class="LineNr"> 22 </span> 8b/-&gt; *(ebp+0x14) 3/r32/ebx
<span id="L23" class="LineNr"> 23 </span> 81 0/subop/add %ebx 0x10/imm32
<span id="L24" class="LineNr"> 24 </span> {
<span id="L25" class="LineNr"> 25 </span> <span class="subxComment"># if (y &gt;= ymax) break</span>
<span id="L26" class="LineNr"> 26 </span> 39/compare %edx 3/r32/ebx
<span id="L27" class="LineNr"> 27 </span> 7d/jump-if-&gt;= <span class="Constant">break</span>/disp8
<span id="L28" class="LineNr"> 28 </span> <span class="subxComment"># eax = x + 7</span>
<span id="L29" class="LineNr"> 29 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L30" class="LineNr"> 30 </span> 81 0/subop/add %eax 7/imm32
<span id="L31" class="LineNr"> 31 </span> <span class="subxComment"># var xmin/ecx: int = x</span>
<span id="L32" class="LineNr"> 32 </span> 8b/-&gt; *(ebp+0x10) 1/r32/ecx
<span id="L33" class="LineNr"> 33 </span> <span class="subxComment"># var row-bitmap/ebx: int = *letter-bitmap</span>
<span id="L34" class="LineNr"> 34 </span> 53/push-ebx
<span id="L35" class="LineNr"> 35 </span> 8b/-&gt; *esi 3/r32/ebx
<span id="L36" class="LineNr"> 36 </span> {
<span id="L37" class="LineNr"> 37 </span> <span class="subxComment"># if (x &lt; xmin) break</span>
<span id="L38" class="LineNr"> 38 </span> 39/compare %eax 1/r32/ecx
<span id="L39" class="LineNr"> 39 </span> 7c/jump-if-&lt; <span class="Constant">break</span>/disp8
<span id="L40" class="LineNr"> 40 </span> <span class="subxComment"># shift LSB from row-bitmap into carry flag (CF)</span>
<span id="L41" class="LineNr"> 41 </span> c1 5/subop/shift-right-logical %ebx 1/imm8
<span id="L42" class="LineNr"> 42 </span> <span class="subxComment"># if LSB, draw a pixel</span>
<span id="L43" class="LineNr"> 43 </span> {
<span id="L44" class="LineNr"> 44 </span> 73/jump-if-not-CF <span class="Constant">break</span>/disp8
<span id="L45" class="LineNr"> 45 </span> (<a href='101screen.subx.html#L3'>pixel</a> *(ebp+8) %eax %edx *(ebp+0x18))
<span id="L46" class="LineNr"> 46 </span> }
<span id="L47" class="LineNr"> 47 </span> <span class="subxComment"># --x</span>
<span id="L48" class="LineNr"> 48 </span> 48/decrement-eax
<span id="L49" class="LineNr"> 49 </span> <span class="subxComment">#</span>
<span id="L50" class="LineNr"> 50 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L51" class="LineNr"> 51 </span> }
<span id="L52" class="LineNr"> 52 </span> <span class="subxComment"># reclaim row-bitmap</span>
<span id="L53" class="LineNr"> 53 </span> 5b/pop-to-ebx
<span id="L54" class="LineNr"> 54 </span> <span class="subxComment"># ++y</span>
<span id="L55" class="LineNr"> 55 </span> 42/increment-edx
<span id="L56" class="LineNr"> 56 </span> <span class="subxComment"># next bitmap row</span>
<span id="L57" class="LineNr"> 57 </span> 46/increment-esi
<span id="L58" class="LineNr"> 58 </span> <span class="subxComment">#</span>
<span id="L59" class="LineNr"> 59 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L60" class="LineNr"> 60 </span> }
<span id="L61" class="LineNr"> 61 </span><span class="Constant">$draw-grapheme:end</span>:
<span id="L62" class="LineNr"> 62 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L63" class="LineNr"> 63 </span> 5e/pop-to-esi
<span id="L64" class="LineNr"> 64 </span> 5b/pop-to-ebx
<span id="L65" class="LineNr"> 65 </span> 5a/pop-to-edx
<span id="L66" class="LineNr"> 66 </span> 59/pop-to-ecx
<span id="L67" class="LineNr"> 67 </span> 58/pop-to-eax
<span id="L68" class="LineNr"> 68 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L69" class="LineNr"> 69 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L70" class="LineNr"> 70 </span> 5d/pop-to-ebp
<span id="L71" class="LineNr"> 71 </span> c3/return
<span id="L72" class="LineNr"> 72 </span>
<span id="L73" class="LineNr"> 73 </span><span class="subxFunction">cursor-position</span>: <span class="subxComment"># screen: (addr screen) -&gt; _/eax: int, _/ecx: int</span>
<span id="L74" class="LineNr"> 74 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L75" class="LineNr"> 75 </span> 55/push-ebp
<span id="L76" class="LineNr"> 76 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L77" class="LineNr"> 77 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L78" class="LineNr"> 78 </span> 8b/-&gt; *<span class="SpecialChar"><a href='103grapheme.subx.html#L107'>Default-next-x</a></span> 0/r32/eax
<span id="L79" class="LineNr"> 79 </span> 8b/-&gt; *<span class="SpecialChar"><a href='103grapheme.subx.html#L110'>Default-next-y</a></span> 1/r32/ecx
<span id="L80" class="LineNr"> 80 </span><span class="Constant">$cursor-position:end</span>:
<span id="L81" class="LineNr"> 81 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L82" class="LineNr"> 82 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L83" class="LineNr"> 83 </span> 5d/pop-to-ebp
<span id="L84" class="LineNr"> 84 </span> c3/return
<span id="L85" class="LineNr"> 85 </span>
<span id="L86" class="LineNr"> 86 </span><span class="subxFunction">set-cursor-position</span>: <span class="subxComment"># screen: (addr screen), x: int, y: int</span>
<span id="L87" class="LineNr"> 87 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L88" class="LineNr"> 88 </span> 55/push-ebp
<span id="L89" class="LineNr"> 89 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L90" class="LineNr"> 90 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L91" class="LineNr"> 91 </span> 50/push-eax
<span id="L92" class="LineNr"> 92 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L93" class="LineNr"> 93 </span> 8b/-&gt; *(ebp+0xc) 0/r32/eax
<span id="L94" class="LineNr"> 94 </span> 89/&lt;- *<span class="SpecialChar"><a href='103grapheme.subx.html#L107'>Default-next-x</a></span> 0/r32/eax
<span id="L95" class="LineNr"> 95 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L96" class="LineNr"> 96 </span> 89/&lt;- *<span class="SpecialChar"><a href='103grapheme.subx.html#L110'>Default-next-y</a></span> 0/r32/eax
<span id="L97" class="LineNr"> 97 </span><span class="Constant">$set-cursor-position:end</span>:
<span id="L98" class="LineNr"> 98 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L99" class="LineNr"> 99 </span> 58/pop-to-eax
<span id="L100" class="LineNr">100 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L101" class="LineNr">101 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L102" class="LineNr">102 </span> 5d/pop-to-ebp
<span id="L103" class="LineNr">103 </span> c3/return
<span id="L104" class="LineNr">104 </span>
<span id="L105" class="LineNr">105 </span>== data
<span id="L106" class="LineNr">106 </span>
<span id="L107" class="LineNr">107 </span><span class="SpecialChar">Default-next-x</span>:
<span id="L108" class="LineNr">108 </span> 0/imm32
<span id="L109" class="LineNr">109 </span>
<span id="L110" class="LineNr">110 </span><span class="SpecialChar">Default-next-y</span>:
<span id="L111" class="LineNr">111 </span> 0/imm32
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Use the built-in font to draw a grapheme to screen.</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span>== code
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="subxFunction">draw-grapheme</span>: <span class="subxComment"># screen: (addr screen), g: grapheme, x: int, y: int, color: int</span>
<span id="L6" class="LineNr"> 6 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L7" class="LineNr"> 7 </span> 55/push-ebp
<span id="L8" class="LineNr"> 8 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L9" class="LineNr"> 9 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L10" class="LineNr"> 10 </span> 50/push-eax
<span id="L11" class="LineNr"> 11 </span> 51/push-ecx
<span id="L12" class="LineNr"> 12 </span> 52/push-edx
<span id="L13" class="LineNr"> 13 </span> 53/push-ebx
<span id="L14" class="LineNr"> 14 </span> 56/push-esi
<span id="L15" class="LineNr"> 15 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L16" class="LineNr"> 16 </span> <span class="subxComment"># var letter-bitmap/esi = font[g]</span>
<span id="L17" class="LineNr"> 17 </span> 8b/-&gt; *(ebp+0xc) 6/r32/esi
<span id="L18" class="LineNr"> 18 </span> c1 4/subop/shift-left %esi 4/imm8
<span id="L19" class="LineNr"> 19 </span> 8d/copy-address *(esi+0x8800) 6/r32/esi <span class="subxComment"># font-start</span>
<span id="L20" class="LineNr"> 20 </span> <span class="subxComment"># if (letter-bitmap &gt;= 0x9000) return # characters beyond ASCII currently not supported</span>
<span id="L21" class="LineNr"> 21 </span> 81 7/subop/compare %esi 0x9000/imm32
<span id="L22" class="LineNr"> 22 </span> 7d/jump-if-&gt;= $draw-grapheme:end/disp8
<span id="L23" class="LineNr"> 23 </span> <span class="subxComment"># edx = y</span>
<span id="L24" class="LineNr"> 24 </span> 8b/-&gt; *(ebp+0x14) 2/r32/edx
<span id="L25" class="LineNr"> 25 </span> <span class="subxComment"># var ymax/ebx: int = y + 16</span>
<span id="L26" class="LineNr"> 26 </span> 8b/-&gt; *(ebp+0x14) 3/r32/ebx
<span id="L27" class="LineNr"> 27 </span> 81 0/subop/add %ebx 0x10/imm32
<span id="L28" class="LineNr"> 28 </span> {
<span id="L29" class="LineNr"> 29 </span> <span class="subxComment"># if (y &gt;= ymax) break</span>
<span id="L30" class="LineNr"> 30 </span> 39/compare %edx 3/r32/ebx
<span id="L31" class="LineNr"> 31 </span> 7d/jump-if-&gt;= <span class="Constant">break</span>/disp8
<span id="L32" class="LineNr"> 32 </span> <span class="subxComment"># eax = x + 7</span>
<span id="L33" class="LineNr"> 33 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L34" class="LineNr"> 34 </span> 81 0/subop/add %eax 7/imm32
<span id="L35" class="LineNr"> 35 </span> <span class="subxComment"># var xmin/ecx: int = x</span>
<span id="L36" class="LineNr"> 36 </span> 8b/-&gt; *(ebp+0x10) 1/r32/ecx
<span id="L37" class="LineNr"> 37 </span> <span class="subxComment"># var row-bitmap/ebx: int = *letter-bitmap</span>
<span id="L38" class="LineNr"> 38 </span> 53/push-ebx
<span id="L39" class="LineNr"> 39 </span> 8b/-&gt; *esi 3/r32/ebx
<span id="L40" class="LineNr"> 40 </span> {
<span id="L41" class="LineNr"> 41 </span> <span class="subxComment"># if (x &lt; xmin) break</span>
<span id="L42" class="LineNr"> 42 </span> 39/compare %eax 1/r32/ecx
<span id="L43" class="LineNr"> 43 </span> 7c/jump-if-&lt; <span class="Constant">break</span>/disp8
<span id="L44" class="LineNr"> 44 </span> <span class="subxComment"># shift LSB from row-bitmap into carry flag (CF)</span>
<span id="L45" class="LineNr"> 45 </span> c1 5/subop/shift-right-logical %ebx 1/imm8
<span id="L46" class="LineNr"> 46 </span> <span class="subxComment"># if LSB, draw a pixel</span>
<span id="L47" class="LineNr"> 47 </span> {
<span id="L48" class="LineNr"> 48 </span> 73/jump-if-not-CF <span class="Constant">break</span>/disp8
<span id="L49" class="LineNr"> 49 </span> (<a href='101screen.subx.html#L5'>pixel</a> *(ebp+8) %eax %edx *(ebp+0x18))
<span id="L50" class="LineNr"> 50 </span> }
<span id="L51" class="LineNr"> 51 </span> <span class="subxComment"># --x</span>
<span id="L52" class="LineNr"> 52 </span> 48/decrement-eax
<span id="L53" class="LineNr"> 53 </span> <span class="subxComment">#</span>
<span id="L54" class="LineNr"> 54 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L55" class="LineNr"> 55 </span> }
<span id="L56" class="LineNr"> 56 </span> <span class="subxComment"># reclaim row-bitmap</span>
<span id="L57" class="LineNr"> 57 </span> 5b/pop-to-ebx
<span id="L58" class="LineNr"> 58 </span> <span class="subxComment"># ++y</span>
<span id="L59" class="LineNr"> 59 </span> 42/increment-edx
<span id="L60" class="LineNr"> 60 </span> <span class="subxComment"># next bitmap row</span>
<span id="L61" class="LineNr"> 61 </span> 46/increment-esi
<span id="L62" class="LineNr"> 62 </span> <span class="subxComment">#</span>
<span id="L63" class="LineNr"> 63 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L64" class="LineNr"> 64 </span> }
<span id="L65" class="LineNr"> 65 </span><span class="Constant">$draw-grapheme:end</span>:
<span id="L66" class="LineNr"> 66 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L67" class="LineNr"> 67 </span> 5e/pop-to-esi
<span id="L68" class="LineNr"> 68 </span> 5b/pop-to-ebx
<span id="L69" class="LineNr"> 69 </span> 5a/pop-to-edx
<span id="L70" class="LineNr"> 70 </span> 59/pop-to-ecx
<span id="L71" class="LineNr"> 71 </span> 58/pop-to-eax
<span id="L72" class="LineNr"> 72 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L73" class="LineNr"> 73 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L74" class="LineNr"> 74 </span> 5d/pop-to-ebp
<span id="L75" class="LineNr"> 75 </span> c3/return
<span id="L76" class="LineNr"> 76 </span>
<span id="L77" class="LineNr"> 77 </span><span class="subxFunction">cursor-position</span>: <span class="subxComment"># screen: (addr screen) -&gt; _/eax: int, _/ecx: int</span>
<span id="L78" class="LineNr"> 78 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L79" class="LineNr"> 79 </span> 55/push-ebp
<span id="L80" class="LineNr"> 80 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L81" class="LineNr"> 81 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L82" class="LineNr"> 82 </span> 8b/-&gt; *<span class="SpecialChar"><a href='103grapheme.subx.html#L111'>Default-next-x</a></span> 0/r32/eax
<span id="L83" class="LineNr"> 83 </span> 8b/-&gt; *<span class="SpecialChar"><a href='103grapheme.subx.html#L114'>Default-next-y</a></span> 1/r32/ecx
<span id="L84" class="LineNr"> 84 </span><span class="Constant">$cursor-position:end</span>:
<span id="L85" class="LineNr"> 85 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L86" class="LineNr"> 86 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L87" class="LineNr"> 87 </span> 5d/pop-to-ebp
<span id="L88" class="LineNr"> 88 </span> c3/return
<span id="L89" class="LineNr"> 89 </span>
<span id="L90" class="LineNr"> 90 </span><span class="subxFunction">set-cursor-position</span>: <span class="subxComment"># screen: (addr screen), x: int, y: int</span>
<span id="L91" class="LineNr"> 91 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L92" class="LineNr"> 92 </span> 55/push-ebp
<span id="L93" class="LineNr"> 93 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L94" class="LineNr"> 94 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L95" class="LineNr"> 95 </span> 50/push-eax
<span id="L96" class="LineNr"> 96 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L97" class="LineNr"> 97 </span> 8b/-&gt; *(ebp+0xc) 0/r32/eax
<span id="L98" class="LineNr"> 98 </span> 89/&lt;- *<span class="SpecialChar"><a href='103grapheme.subx.html#L111'>Default-next-x</a></span> 0/r32/eax
<span id="L99" class="LineNr"> 99 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L100" class="LineNr">100 </span> 89/&lt;- *<span class="SpecialChar"><a href='103grapheme.subx.html#L114'>Default-next-y</a></span> 0/r32/eax
<span id="L101" class="LineNr">101 </span><span class="Constant">$set-cursor-position:end</span>:
<span id="L102" class="LineNr">102 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L103" class="LineNr">103 </span> 58/pop-to-eax
<span id="L104" class="LineNr">104 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L105" class="LineNr">105 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L106" class="LineNr">106 </span> 5d/pop-to-ebp
<span id="L107" class="LineNr">107 </span> c3/return
<span id="L108" class="LineNr">108 </span>
<span id="L109" class="LineNr">109 </span>== data
<span id="L110" class="LineNr">110 </span>
<span id="L111" class="LineNr">111 </span><span class="SpecialChar">Default-next-x</span>:
<span id="L112" class="LineNr">112 </span> 0/imm32
<span id="L113" class="LineNr">113 </span>
<span id="L114" class="LineNr">114 </span><span class="SpecialChar">Default-next-y</span>:
<span id="L115" class="LineNr">115 </span> 0/imm32
</pre>
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<title>Mu - baremetal/104test.subx</title>
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<a href='https://github.com/akkartik/mu/blob/main/baremetal/104test.subx'>https://github.com/akkartik/mu/blob/main/baremetal/104test.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Some helpers needed only because Mu doesn't support globals at the moment.</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span>== code
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="subxFunction">count-test-failure</span>:
<span id="L6" class="LineNr"> 6 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L7" class="LineNr"> 7 </span> 55/push-ebp
<span id="L8" class="LineNr"> 8 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L9" class="LineNr"> 9 </span> <span class="subxComment">#</span>
<span id="L10" class="LineNr">10 </span> ff 0/subop/increment *<span class="SpecialChar"><a href='104test.subx.html#L31'>Num-test-failures</a></span>
<span id="L11" class="LineNr">11 </span><span class="Constant">$count-test-failure:end</span>:
<span id="L12" class="LineNr">12 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L13" class="LineNr">13 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L14" class="LineNr">14 </span> 5d/pop-to-ebp
<span id="L15" class="LineNr">15 </span> c3/return
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </span><span class="subxFunction">num-test-failures</span>: <span class="subxComment"># -&gt; _/eax: int</span>
<span id="L18" class="LineNr">18 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L19" class="LineNr">19 </span> 55/push-ebp
<span id="L20" class="LineNr">20 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L21" class="LineNr">21 </span> <span class="subxComment">#</span>
<span id="L22" class="LineNr">22 </span> 8b/-&gt; *<span class="SpecialChar"><a href='104test.subx.html#L31'>Num-test-failures</a></span> 0/r32/eax
<span id="L23" class="LineNr">23 </span><span class="Constant">$num-test-failures:end</span>:
<span id="L24" class="LineNr">24 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L25" class="LineNr">25 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L26" class="LineNr">26 </span> 5d/pop-to-ebp
<span id="L27" class="LineNr">27 </span> c3/return
<span id="L28" class="LineNr">28 </span>
<span id="L29" class="LineNr">29 </span>== data
<span id="L30" class="LineNr">30 </span>
<span id="L31" class="LineNr">31 </span><span class="SpecialChar">Num-test-failures</span>:
<span id="L32" class="LineNr">32 </span> 0/imm32
</pre>
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<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="subxFunction">write</span>: <span class="subxComment"># f: (addr stream byte), s: (addr array byte)</span>
<span id="L6" class="LineNr"> 6 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L7" class="LineNr"> 7 </span> 55/push-ebp
<span id="L8" class="LineNr"> 8 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L9" class="LineNr"> 9 </span> <span class="subxComment"># if (s == 0) return</span>
<span id="L10" class="LineNr"> 10 </span> 81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 0/imm32 <span class="subxComment"># compare *(ebp+12)</span>
<span id="L11" class="LineNr"> 11 </span> 74/jump-if-= $write:end/disp8
<span id="L12" class="LineNr"> 12 </span> <span class="subxComment"># TODO: write to file</span>
<span id="L13" class="LineNr"> 13 </span> <span class="subxComment"># otherwise, treat 'f' as a stream to append to</span>
<span id="L14" class="LineNr"> 14 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L15" class="LineNr"> 15 </span> 50/push-eax
<span id="L16" class="LineNr"> 16 </span> 51/push-ecx
<span id="L17" class="LineNr"> 17 </span> 52/push-edx
<span id="L18" class="LineNr"> 18 </span> 53/push-ebx
<span id="L19" class="LineNr"> 19 </span> <span class="subxComment"># ecx = f</span>
<span id="L20" class="LineNr"> 20 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to ecx</span>
<span id="L21" class="LineNr"> 21 </span> <span class="subxComment"># edx = f-&gt;write</span>
<span id="L22" class="LineNr"> 22 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to edx</span>
<span id="L23" class="LineNr"> 23 </span> <span class="subxComment"># ebx = f-&gt;size</span>
<span id="L24" class="LineNr"> 24 </span> 8b/copy 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ecx+8) to ebx</span>
<span id="L25" class="LineNr"> 25 </span> <span class="subxComment"># eax = _append-3(&amp;f-&gt;data[f-&gt;write], &amp;f-&gt;data[f-&gt;size], s)</span>
<span id="L26" class="LineNr"> 26 </span> <span class="subxS2Comment"># . . push s</span>
<span id="L27" class="LineNr"> 27 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L28" class="LineNr"> 28 </span> <span class="subxS2Comment"># . . push &amp;f-&gt;data[f-&gt;size]</span>
<span id="L29" class="LineNr"> 29 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 1/base/ecx 3/index/ebx <span class="Normal"> . </span> 3/r32/ebx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy ecx+ebx+12 to ebx</span>
<span id="L30" class="LineNr"> 30 </span> 53/push-ebx
<span id="L31" class="LineNr"> 31 </span> <span class="subxS2Comment"># . . push &amp;f-&gt;data[f-&gt;write]</span>
<span id="L32" class="LineNr"> 32 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 1/base/ecx 2/index/edx <span class="Normal"> . </span> 3/r32/ebx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy ecx+edx+12 to ebx</span>
<span id="L33" class="LineNr"> 33 </span> 53/push-ebx
<span id="L34" class="LineNr"> 34 </span> <span class="subxS2Comment"># . . call</span>
<span id="L35" class="LineNr"> 35 </span> e8/call <a href='108write.subx.html#L54'>_append-3</a>/disp32
<span id="L36" class="LineNr"> 36 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L37" class="LineNr"> 37 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L38" class="LineNr"> 38 </span> <span class="subxComment"># f-&gt;write += eax</span>
<span id="L39" class="LineNr"> 39 </span> 01/add 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># add eax to *ecx</span>
<span id="L40" class="LineNr"> 40 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L41" class="LineNr"> 41 </span> 5b/pop-to-ebx
<span id="L42" class="LineNr"> 42 </span> 5a/pop-to-edx
<span id="L43" class="LineNr"> 43 </span> 59/pop-to-ecx
<span id="L44" class="LineNr"> 44 </span> 58/pop-to-eax
<span id="L45" class="LineNr"> 45 </span><span class="Constant">$write:end</span>:
<span id="L46" class="LineNr"> 46 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L47" class="LineNr"> 47 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L48" class="LineNr"> 48 </span> 5d/pop-to-ebp
<span id="L49" class="LineNr"> 49 </span> c3/return
<span id="L50" class="LineNr"> 50 </span>
<span id="L51" class="LineNr"> 51 </span><span class="subxComment"># TODO: bring in tests once we have check-ints-equal</span>
<span id="L52" class="LineNr"> 52 </span>
<span id="L53" class="LineNr"> 53 </span><span class="subxComment"># 3-argument variant of _append</span>
<span id="L54" class="LineNr"> 54 </span><span class="subxMinorFunction">_append-3</span>: <span class="subxComment"># out: (addr byte), outend: (addr byte), s: (addr array byte) -&gt; num_bytes_appended/eax</span>
<span id="L55" class="LineNr"> 55 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L56" class="LineNr"> 56 </span> 55/push-ebp
<span id="L57" class="LineNr"> 57 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L58" class="LineNr"> 58 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L59" class="LineNr"> 59 </span> 51/push-ecx
<span id="L60" class="LineNr"> 60 </span> <span class="subxComment"># eax = _append-4(out, outend, &amp;s-&gt;data[0], &amp;s-&gt;data[s-&gt;size])</span>
<span id="L61" class="LineNr"> 61 </span> <span class="subxS2Comment"># . . push &amp;s-&gt;data[s-&gt;size]</span>
<span id="L62" class="LineNr"> 62 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to eax</span>
<span id="L63" class="LineNr"> 63 </span> 8b/copy 0/mod/indirect 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *eax to ecx</span>
<span id="L64" class="LineNr"> 64 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax+ecx+4 to ecx</span>
<span id="L65" class="LineNr"> 65 </span> 51/push-ecx
<span id="L66" class="LineNr"> 66 </span> <span class="subxS2Comment"># . . push &amp;s-&gt;data[0]</span>
<span id="L67" class="LineNr"> 67 </span> 8d/copy-address 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax+4 to ecx</span>
<span id="L68" class="LineNr"> 68 </span> 51/push-ecx
<span id="L69" class="LineNr"> 69 </span> <span class="subxS2Comment"># . . push outend</span>
<span id="L70" class="LineNr"> 70 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L71" class="LineNr"> 71 </span> <span class="subxS2Comment"># . . push out</span>
<span id="L72" class="LineNr"> 72 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L73" class="LineNr"> 73 </span> <span class="subxS2Comment"># . . call</span>
<span id="L74" class="LineNr"> 74 </span> e8/call <a href='108write.subx.html#L86'>_append-4</a>/disp32
<span id="L75" class="LineNr"> 75 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L76" class="LineNr"> 76 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span>
<span id="L77" class="LineNr"> 77 </span><span class="Constant">$_append-3:end</span>:
<span id="L78" class="LineNr"> 78 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L79" class="LineNr"> 79 </span> 59/pop-to-ecx
<span id="L80" class="LineNr"> 80 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L81" class="LineNr"> 81 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L82" class="LineNr"> 82 </span> 5d/pop-to-ebp
<span id="L83" class="LineNr"> 83 </span> c3/return
<span id="L84" class="LineNr"> 84 </span>
<span id="L85" class="LineNr"> 85 </span><span class="subxComment"># 4-argument variant of _append</span>
<span id="L86" class="LineNr"> 86 </span><span class="subxMinorFunction">_append-4</span>: <span class="subxComment"># out: (addr byte), outend: (addr byte), in: (addr byte), inend: (addr byte) -&gt; num_bytes_appended/eax: int</span>
<span id="L87" class="LineNr"> 87 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L88" class="LineNr"> 88 </span> 55/push-ebp
<span id="L89" class="LineNr"> 89 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L90" class="LineNr"> 90 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L91" class="LineNr"> 91 </span> 51/push-ecx
<span id="L92" class="LineNr"> 92 </span> 52/push-edx
<span id="L93" class="LineNr"> 93 </span> 53/push-ebx
<span id="L94" class="LineNr"> 94 </span> 56/push-esi
<span id="L95" class="LineNr"> 95 </span> 57/push-edi
<span id="L96" class="LineNr"> 96 </span> <span class="subxComment"># num_bytes_appended = 0</span>
<span id="L97" class="LineNr"> 97 </span> b8/copy-to-eax 0/imm32
<span id="L98" class="LineNr"> 98 </span> <span class="subxComment"># edi = out</span>
<span id="L99" class="LineNr"> 99 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to edi</span>
<span id="L100" class="LineNr">100 </span> <span class="subxComment"># edx = outend</span>
<span id="L101" class="LineNr">101 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to edx</span>
<span id="L102" class="LineNr">102 </span> <span class="subxComment"># esi = in</span>
<span id="L103" class="LineNr">103 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to esi</span>
<span id="L104" class="LineNr">104 </span> <span class="subxComment"># ecx = inend</span>
<span id="L105" class="LineNr">105 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0x14/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+20) to ecx</span>
<span id="L106" class="LineNr">106 </span><span class="Constant">$_append-4:loop</span>:
<span id="L107" class="LineNr">107 </span> <span class="subxComment"># if (in &gt;= inend) break</span>
<span id="L108" class="LineNr">108 </span> 39/compare 3/mod/direct 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare esi with ecx</span>
<span id="L109" class="LineNr">109 </span> 73/jump-if-addr&gt;= $_append-4:end/disp8
<span id="L110" class="LineNr">110 </span> <span class="subxComment"># if (out &gt;= outend) abort # just to catch test failures fast</span>
<span id="L111" class="LineNr">111 </span> 39/compare 3/mod/direct 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare edi with edx</span>
<span id="L112" class="LineNr">112 </span> 73/jump-if-addr&gt;= $_append-4:end/disp8 <span class="subxComment"># TODO: abort</span>
<span id="L113" class="LineNr">113 </span> <span class="subxComment"># *out = *in</span>
<span id="L114" class="LineNr">114 </span> 8a/copy-byte 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/BL <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy byte at *esi to BL</span>
<span id="L115" class="LineNr">115 </span> 88/copy-byte 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/BL <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy byte at BL to *edi</span>
<span id="L116" class="LineNr">116 </span> <span class="subxComment"># ++num_bytes_appended</span>
<span id="L117" class="LineNr">117 </span> 40/increment-eax
<span id="L118" class="LineNr">118 </span> <span class="subxComment"># ++in</span>
<span id="L119" class="LineNr">119 </span> 46/increment-esi
<span id="L120" class="LineNr">120 </span> <span class="subxComment"># ++out</span>
<span id="L121" class="LineNr">121 </span> 47/increment-edi
<span id="L122" class="LineNr">122 </span> eb/jump $_append-4:<span class="Constant">loop</span>/disp8
<span id="L123" class="LineNr">123 </span><span class="Constant">$_append-4:end</span>:
<span id="L124" class="LineNr">124 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L125" class="LineNr">125 </span> 5f/pop-to-edi
<span id="L126" class="LineNr">126 </span> 5e/pop-to-esi
<span id="L127" class="LineNr">127 </span> 5b/pop-to-ebx
<span id="L128" class="LineNr">128 </span> 5a/pop-to-edx
<span id="L129" class="LineNr">129 </span> 59/pop-to-ecx
<span id="L130" class="LineNr">130 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L131" class="LineNr">131 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L132" class="LineNr">132 </span> 5d/pop-to-ebp
<span id="L133" class="LineNr">133 </span> c3/return
<span id="L134" class="LineNr">134 </span>
<span id="L135" class="LineNr">135 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
<span id="L1" class="LineNr"> 1 </span>== code
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="subxFunction">write</span>: <span class="subxComment"># f: (addr stream byte), s: (addr array byte)</span>
<span id="L7" class="LineNr"> 7 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L8" class="LineNr"> 8 </span> 55/push-ebp
<span id="L9" class="LineNr"> 9 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L10" class="LineNr"> 10 </span> <span class="subxComment"># if (s == 0) return</span>
<span id="L11" class="LineNr"> 11 </span> 81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 0/imm32 <span class="subxComment"># compare *(ebp+12)</span>
<span id="L12" class="LineNr"> 12 </span> 74/jump-if-= $write:end/disp8
<span id="L13" class="LineNr"> 13 </span> <span class="subxComment"># TODO: write to file</span>
<span id="L14" class="LineNr"> 14 </span> <span class="subxComment"># otherwise, treat 'f' as a stream to append to</span>
<span id="L15" class="LineNr"> 15 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L16" class="LineNr"> 16 </span> 50/push-eax
<span id="L17" class="LineNr"> 17 </span> 51/push-ecx
<span id="L18" class="LineNr"> 18 </span> 52/push-edx
<span id="L19" class="LineNr"> 19 </span> 53/push-ebx
<span id="L20" class="LineNr"> 20 </span> <span class="subxComment"># ecx = f</span>
<span id="L21" class="LineNr"> 21 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to ecx</span>
<span id="L22" class="LineNr"> 22 </span> <span class="subxComment"># edx = f-&gt;write</span>
<span id="L23" class="LineNr"> 23 </span> 8b/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *ecx to edx</span>
<span id="L24" class="LineNr"> 24 </span> <span class="subxComment"># ebx = f-&gt;size</span>
<span id="L25" class="LineNr"> 25 </span> 8b/copy 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/ebx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ecx+8) to ebx</span>
<span id="L26" class="LineNr"> 26 </span> <span class="subxComment"># eax = _append-3(&amp;f-&gt;data[f-&gt;write], &amp;f-&gt;data[f-&gt;size], s)</span>
<span id="L27" class="LineNr"> 27 </span> <span class="subxS2Comment"># . . push s</span>
<span id="L28" class="LineNr"> 28 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L29" class="LineNr"> 29 </span> <span class="subxS2Comment"># . . push &amp;f-&gt;data[f-&gt;size]</span>
<span id="L30" class="LineNr"> 30 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 1/base/ecx 3/index/ebx <span class="Normal"> . </span> 3/r32/ebx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy ecx+ebx+12 to ebx</span>
<span id="L31" class="LineNr"> 31 </span> 53/push-ebx
<span id="L32" class="LineNr"> 32 </span> <span class="subxS2Comment"># . . push &amp;f-&gt;data[f-&gt;write]</span>
<span id="L33" class="LineNr"> 33 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 1/base/ecx 2/index/edx <span class="Normal"> . </span> 3/r32/ebx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy ecx+edx+12 to ebx</span>
<span id="L34" class="LineNr"> 34 </span> 53/push-ebx
<span id="L35" class="LineNr"> 35 </span> <span class="subxS2Comment"># . . call</span>
<span id="L36" class="LineNr"> 36 </span> e8/call <a href='108write.subx.html#L55'>_append-3</a>/disp32
<span id="L37" class="LineNr"> 37 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L38" class="LineNr"> 38 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span>
<span id="L39" class="LineNr"> 39 </span> <span class="subxComment"># f-&gt;write += eax</span>
<span id="L40" class="LineNr"> 40 </span> 01/add 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># add eax to *ecx</span>
<span id="L41" class="LineNr"> 41 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L42" class="LineNr"> 42 </span> 5b/pop-to-ebx
<span id="L43" class="LineNr"> 43 </span> 5a/pop-to-edx
<span id="L44" class="LineNr"> 44 </span> 59/pop-to-ecx
<span id="L45" class="LineNr"> 45 </span> 58/pop-to-eax
<span id="L46" class="LineNr"> 46 </span><span class="Constant">$write:end</span>:
<span id="L47" class="LineNr"> 47 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L48" class="LineNr"> 48 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L49" class="LineNr"> 49 </span> 5d/pop-to-ebp
<span id="L50" class="LineNr"> 50 </span> c3/return
<span id="L51" class="LineNr"> 51 </span>
<span id="L52" class="LineNr"> 52 </span><span class="subxComment"># TODO: bring in tests once we have check-ints-equal</span>
<span id="L53" class="LineNr"> 53 </span>
<span id="L54" class="LineNr"> 54 </span><span class="subxComment"># 3-argument variant of _append</span>
<span id="L55" class="LineNr"> 55 </span><span class="subxMinorFunction">_append-3</span>: <span class="subxComment"># out: (addr byte), outend: (addr byte), s: (addr array byte) -&gt; num_bytes_appended/eax</span>
<span id="L56" class="LineNr"> 56 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L57" class="LineNr"> 57 </span> 55/push-ebp
<span id="L58" class="LineNr"> 58 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L59" class="LineNr"> 59 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L60" class="LineNr"> 60 </span> 51/push-ecx
<span id="L61" class="LineNr"> 61 </span> <span class="subxComment"># eax = _append-4(out, outend, &amp;s-&gt;data[0], &amp;s-&gt;data[s-&gt;size])</span>
<span id="L62" class="LineNr"> 62 </span> <span class="subxS2Comment"># . . push &amp;s-&gt;data[s-&gt;size]</span>
<span id="L63" class="LineNr"> 63 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to eax</span>
<span id="L64" class="LineNr"> 64 </span> 8b/copy 0/mod/indirect 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *eax to ecx</span>
<span id="L65" class="LineNr"> 65 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax+ecx+4 to ecx</span>
<span id="L66" class="LineNr"> 66 </span> 51/push-ecx
<span id="L67" class="LineNr"> 67 </span> <span class="subxS2Comment"># . . push &amp;s-&gt;data[0]</span>
<span id="L68" class="LineNr"> 68 </span> 8d/copy-address 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax+4 to ecx</span>
<span id="L69" class="LineNr"> 69 </span> 51/push-ecx
<span id="L70" class="LineNr"> 70 </span> <span class="subxS2Comment"># . . push outend</span>
<span id="L71" class="LineNr"> 71 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span>
<span id="L72" class="LineNr"> 72 </span> <span class="subxS2Comment"># . . push out</span>
<span id="L73" class="LineNr"> 73 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span>
<span id="L74" class="LineNr"> 74 </span> <span class="subxS2Comment"># . . call</span>
<span id="L75" class="LineNr"> 75 </span> e8/call <a href='108write.subx.html#L87'>_append-4</a>/disp32
<span id="L76" class="LineNr"> 76 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L77" class="LineNr"> 77 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0x10/imm32 <span class="subxComment"># add to esp</span>
<span id="L78" class="LineNr"> 78 </span><span class="Constant">$_append-3:end</span>:
<span id="L79" class="LineNr"> 79 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L80" class="LineNr"> 80 </span> 59/pop-to-ecx
<span id="L81" class="LineNr"> 81 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L82" class="LineNr"> 82 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L83" class="LineNr"> 83 </span> 5d/pop-to-ebp
<span id="L84" class="LineNr"> 84 </span> c3/return
<span id="L85" class="LineNr"> 85 </span>
<span id="L86" class="LineNr"> 86 </span><span class="subxComment"># 4-argument variant of _append</span>
<span id="L87" class="LineNr"> 87 </span><span class="subxMinorFunction">_append-4</span>: <span class="subxComment"># out: (addr byte), outend: (addr byte), in: (addr byte), inend: (addr byte) -&gt; num_bytes_appended/eax: int</span>
<span id="L88" class="LineNr"> 88 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L89" class="LineNr"> 89 </span> 55/push-ebp
<span id="L90" class="LineNr"> 90 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L91" class="LineNr"> 91 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L92" class="LineNr"> 92 </span> 51/push-ecx
<span id="L93" class="LineNr"> 93 </span> 52/push-edx
<span id="L94" class="LineNr"> 94 </span> 53/push-ebx
<span id="L95" class="LineNr"> 95 </span> 56/push-esi
<span id="L96" class="LineNr"> 96 </span> 57/push-edi
<span id="L97" class="LineNr"> 97 </span> <span class="subxComment"># num_bytes_appended = 0</span>
<span id="L98" class="LineNr"> 98 </span> b8/copy-to-eax 0/imm32
<span id="L99" class="LineNr"> 99 </span> <span class="subxComment"># edi = out</span>
<span id="L100" class="LineNr">100 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to edi</span>
<span id="L101" class="LineNr">101 </span> <span class="subxComment"># edx = outend</span>
<span id="L102" class="LineNr">102 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to edx</span>
<span id="L103" class="LineNr">103 </span> <span class="subxComment"># esi = in</span>
<span id="L104" class="LineNr">104 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to esi</span>
<span id="L105" class="LineNr">105 </span> <span class="subxComment"># ecx = inend</span>
<span id="L106" class="LineNr">106 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0x14/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+20) to ecx</span>
<span id="L107" class="LineNr">107 </span><span class="Constant">$_append-4:loop</span>:
<span id="L108" class="LineNr">108 </span> <span class="subxComment"># if (in &gt;= inend) break</span>
<span id="L109" class="LineNr">109 </span> 39/compare 3/mod/direct 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare esi with ecx</span>
<span id="L110" class="LineNr">110 </span> 73/jump-if-addr&gt;= $_append-4:end/disp8
<span id="L111" class="LineNr">111 </span> <span class="subxComment"># if (out &gt;= outend) abort # just to catch test failures fast</span>
<span id="L112" class="LineNr">112 </span> 39/compare 3/mod/direct 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare edi with edx</span>
<span id="L113" class="LineNr">113 </span> 73/jump-if-addr&gt;= $_append-4:end/disp8 <span class="subxComment"># TODO: abort</span>
<span id="L114" class="LineNr">114 </span> <span class="subxComment"># *out = *in</span>
<span id="L115" class="LineNr">115 </span> 8a/copy-byte 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/BL <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy byte at *esi to BL</span>
<span id="L116" class="LineNr">116 </span> 88/copy-byte 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 3/r32/BL <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy byte at BL to *edi</span>
<span id="L117" class="LineNr">117 </span> <span class="subxComment"># ++num_bytes_appended</span>
<span id="L118" class="LineNr">118 </span> 40/increment-eax
<span id="L119" class="LineNr">119 </span> <span class="subxComment"># ++in</span>
<span id="L120" class="LineNr">120 </span> 46/increment-esi
<span id="L121" class="LineNr">121 </span> <span class="subxComment"># ++out</span>
<span id="L122" class="LineNr">122 </span> 47/increment-edi
<span id="L123" class="LineNr">123 </span> eb/jump $_append-4:<span class="Constant">loop</span>/disp8
<span id="L124" class="LineNr">124 </span><span class="Constant">$_append-4:end</span>:
<span id="L125" class="LineNr">125 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L126" class="LineNr">126 </span> 5f/pop-to-edi
<span id="L127" class="LineNr">127 </span> 5e/pop-to-esi
<span id="L128" class="LineNr">128 </span> 5b/pop-to-ebx
<span id="L129" class="LineNr">129 </span> 5a/pop-to-edx
<span id="L130" class="LineNr">130 </span> 59/pop-to-ecx
<span id="L131" class="LineNr">131 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L132" class="LineNr">132 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L133" class="LineNr">133 </span> 5d/pop-to-ebp
<span id="L134" class="LineNr">134 </span> c3/return
<span id="L135" class="LineNr">135 </span>
<span id="L136" class="LineNr">136 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
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@ -56,43 +56,44 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/112read-byte.subx'>https://github.com/akkartik/mu/blob/main/baremetal/112read-byte.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># TODO: read-byte-buffered</span>
<span id="L6" class="LineNr"> 6 </span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># Return next byte value in eax, with top 3 bytes cleared.</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># Abort on reaching end of stream.</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxFunction">read-byte</span>: <span class="subxComment"># s: (addr stream byte) -&gt; result/eax: byte</span>
<span id="L10" class="LineNr">10 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L11" class="LineNr">11 </span> 55/push-ebp
<span id="L12" class="LineNr">12 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L13" class="LineNr">13 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L14" class="LineNr">14 </span> 51/push-ecx
<span id="L15" class="LineNr">15 </span> 56/push-esi
<span id="L16" class="LineNr">16 </span> <span class="subxComment"># esi = s</span>
<span id="L17" class="LineNr">17 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to esi</span>
<span id="L18" class="LineNr">18 </span> <span class="subxComment"># ecx = s-&gt;read</span>
<span id="L19" class="LineNr">19 </span> 8b/copy 1/mod/*+disp8 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(esi+4) to ecx</span>
<span id="L20" class="LineNr">20 </span> <span class="subxComment"># if (f-&gt;read &gt;= f-&gt;write) abort</span>
<span id="L21" class="LineNr">21 </span> 3b/compare 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare ecx with *esi</span>
<span id="L22" class="LineNr">22 </span> 0f 8d/jump-if-&gt;= $read-byte:end/disp32 <span class="subxComment"># TODO: abort</span>
<span id="L23" class="LineNr">23 </span> <span class="subxComment"># result = f-&gt;data[f-&gt;read]</span>
<span id="L24" class="LineNr">24 </span> 31/xor 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear eax</span>
<span id="L25" class="LineNr">25 </span> 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx <span class="Normal"> . </span> 0/r32/AL 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy byte at *(esi+ecx+12) to AL</span>
<span id="L26" class="LineNr">26 </span> <span class="subxComment"># ++f-&gt;read</span>
<span id="L27" class="LineNr">27 </span> ff 0/subop/increment 1/mod/*+disp8 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># increment *(esi+4)</span>
<span id="L28" class="LineNr">28 </span><span class="Constant">$read-byte:end</span>:
<span id="L29" class="LineNr">29 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L30" class="LineNr">30 </span> 5e/pop-to-esi
<span id="L31" class="LineNr">31 </span> 59/pop-to-ecx
<span id="L32" class="LineNr">32 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L33" class="LineNr">33 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L34" class="LineNr">34 </span> 5d/pop-to-ebp
<span id="L35" class="LineNr">35 </span> c3/return
<span id="L36" class="LineNr">36 </span>
<span id="L37" class="LineNr">37 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
<span id="L1" class="LineNr"> 1 </span>== code
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># TODO: read-byte-buffered</span>
<span id="L7" class="LineNr"> 7 </span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># Return next byte value in eax, with top 3 bytes cleared.</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># Abort on reaching end of stream.</span>
<span id="L10" class="LineNr">10 </span><span class="subxFunction">read-byte</span>: <span class="subxComment"># s: (addr stream byte) -&gt; result/eax: byte</span>
<span id="L11" class="LineNr">11 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L12" class="LineNr">12 </span> 55/push-ebp
<span id="L13" class="LineNr">13 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L14" class="LineNr">14 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L15" class="LineNr">15 </span> 51/push-ecx
<span id="L16" class="LineNr">16 </span> 56/push-esi
<span id="L17" class="LineNr">17 </span> <span class="subxComment"># esi = s</span>
<span id="L18" class="LineNr">18 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to esi</span>
<span id="L19" class="LineNr">19 </span> <span class="subxComment"># ecx = s-&gt;read</span>
<span id="L20" class="LineNr">20 </span> 8b/copy 1/mod/*+disp8 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(esi+4) to ecx</span>
<span id="L21" class="LineNr">21 </span> <span class="subxComment"># if (f-&gt;read &gt;= f-&gt;write) abort</span>
<span id="L22" class="LineNr">22 </span> 3b/compare 0/mod/indirect 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare ecx with *esi</span>
<span id="L23" class="LineNr">23 </span> 0f 8d/jump-if-&gt;= $read-byte:end/disp32 <span class="subxComment"># TODO: abort</span>
<span id="L24" class="LineNr">24 </span> <span class="subxComment"># result = f-&gt;data[f-&gt;read]</span>
<span id="L25" class="LineNr">25 </span> 31/xor 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear eax</span>
<span id="L26" class="LineNr">26 </span> 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/esi 1/index/ecx <span class="Normal"> . </span> 0/r32/AL 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy byte at *(esi+ecx+12) to AL</span>
<span id="L27" class="LineNr">27 </span> <span class="subxComment"># ++f-&gt;read</span>
<span id="L28" class="LineNr">28 </span> ff 0/subop/increment 1/mod/*+disp8 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># increment *(esi+4)</span>
<span id="L29" class="LineNr">29 </span><span class="Constant">$read-byte:end</span>:
<span id="L30" class="LineNr">30 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L31" class="LineNr">31 </span> 5e/pop-to-esi
<span id="L32" class="LineNr">32 </span> 59/pop-to-ecx
<span id="L33" class="LineNr">33 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L34" class="LineNr">34 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L35" class="LineNr">35 </span> 5d/pop-to-ebp
<span id="L36" class="LineNr">36 </span> c3/return
<span id="L37" class="LineNr">37 </span>
<span id="L38" class="LineNr">38 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
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@ -56,43 +56,44 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/115write-byte.subx'>https://github.com/akkartik/mu/blob/main/baremetal/115write-byte.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># Write lower byte of 'n' to 'f'.</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxFunction">append-byte</span>: <span class="subxComment"># f: (addr stream byte), n: int</span>
<span id="L7" class="LineNr"> 7 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L8" class="LineNr"> 8 </span> 55/push-ebp
<span id="L9" class="LineNr"> 9 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L10" class="LineNr">10 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L11" class="LineNr">11 </span> 51/push-ecx
<span id="L12" class="LineNr">12 </span> 57/push-edi
<span id="L13" class="LineNr">13 </span> <span class="subxComment"># edi = f</span>
<span id="L14" class="LineNr">14 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to edi</span>
<span id="L15" class="LineNr">15 </span> <span class="subxComment"># ecx = f-&gt;write</span>
<span id="L16" class="LineNr">16 </span> 8b/copy 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *edi to ecx</span>
<span id="L17" class="LineNr">17 </span> <span class="subxComment"># if (f-&gt;write &gt;= f-&gt;size) abort</span>
<span id="L18" class="LineNr">18 </span> 3b/compare 1/mod/*+disp8 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># compare ecx with *(edi+8)</span>
<span id="L19" class="LineNr">19 </span> 7d/jump-if-&gt;= $append-byte:end/disp8 <span class="subxComment"># TODO: abort</span>
<span id="L20" class="LineNr">20 </span><span class="Constant">$append-byte:to-stream</span>:
<span id="L21" class="LineNr">21 </span> <span class="subxComment"># write to stream</span>
<span id="L22" class="LineNr">22 </span> <span class="subxComment"># f-&gt;data[f-&gt;write] = LSB(n)</span>
<span id="L23" class="LineNr">23 </span> 31/xor 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear eax</span>
<span id="L24" class="LineNr">24 </span> 8a/copy-byte 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/AL 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy byte at *(ebp+12) to AL</span>
<span id="L25" class="LineNr">25 </span> 88/copy-byte 1/mod/*+disp8 4/rm32/sib 7/base/edi 1/index/ecx <span class="Normal"> . </span> 0/r32/AL 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy AL to *(edi+ecx+12)</span>
<span id="L26" class="LineNr">26 </span> <span class="subxComment"># ++f-&gt;write</span>
<span id="L27" class="LineNr">27 </span> ff 0/subop/increment 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># increment *edi</span>
<span id="L28" class="LineNr">28 </span><span class="Constant">$append-byte:end</span>:
<span id="L29" class="LineNr">29 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L30" class="LineNr">30 </span> 5f/pop-to-edi
<span id="L31" class="LineNr">31 </span> 59/pop-to-ecx
<span id="L32" class="LineNr">32 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L33" class="LineNr">33 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L34" class="LineNr">34 </span> 5d/pop-to-ebp
<span id="L35" class="LineNr">35 </span> c3/return
<span id="L36" class="LineNr">36 </span>
<span id="L37" class="LineNr">37 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
<span id="L1" class="LineNr"> 1 </span>== code
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># Write lower byte of 'n' to 'f'.</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxFunction">append-byte</span>: <span class="subxComment"># f: (addr stream byte), n: int</span>
<span id="L8" class="LineNr"> 8 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L9" class="LineNr"> 9 </span> 55/push-ebp
<span id="L10" class="LineNr">10 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L11" class="LineNr">11 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L12" class="LineNr">12 </span> 51/push-ecx
<span id="L13" class="LineNr">13 </span> 57/push-edi
<span id="L14" class="LineNr">14 </span> <span class="subxComment"># edi = f</span>
<span id="L15" class="LineNr">15 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 7/r32/edi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to edi</span>
<span id="L16" class="LineNr">16 </span> <span class="subxComment"># ecx = f-&gt;write</span>
<span id="L17" class="LineNr">17 </span> 8b/copy 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy *edi to ecx</span>
<span id="L18" class="LineNr">18 </span> <span class="subxComment"># if (f-&gt;write &gt;= f-&gt;size) abort</span>
<span id="L19" class="LineNr">19 </span> 3b/compare 1/mod/*+disp8 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># compare ecx with *(edi+8)</span>
<span id="L20" class="LineNr">20 </span> 7d/jump-if-&gt;= $append-byte:end/disp8 <span class="subxComment"># TODO: abort</span>
<span id="L21" class="LineNr">21 </span><span class="Constant">$append-byte:to-stream</span>:
<span id="L22" class="LineNr">22 </span> <span class="subxComment"># write to stream</span>
<span id="L23" class="LineNr">23 </span> <span class="subxComment"># f-&gt;data[f-&gt;write] = LSB(n)</span>
<span id="L24" class="LineNr">24 </span> 31/xor 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear eax</span>
<span id="L25" class="LineNr">25 </span> 8a/copy-byte 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/AL 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy byte at *(ebp+12) to AL</span>
<span id="L26" class="LineNr">26 </span> 88/copy-byte 1/mod/*+disp8 4/rm32/sib 7/base/edi 1/index/ecx <span class="Normal"> . </span> 0/r32/AL 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy AL to *(edi+ecx+12)</span>
<span id="L27" class="LineNr">27 </span> <span class="subxComment"># ++f-&gt;write</span>
<span id="L28" class="LineNr">28 </span> ff 0/subop/increment 0/mod/indirect 7/rm32/edi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># increment *edi</span>
<span id="L29" class="LineNr">29 </span><span class="Constant">$append-byte:end</span>:
<span id="L30" class="LineNr">30 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L31" class="LineNr">31 </span> 5f/pop-to-edi
<span id="L32" class="LineNr">32 </span> 59/pop-to-ecx
<span id="L33" class="LineNr">33 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L34" class="LineNr">34 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L35" class="LineNr">35 </span> 5d/pop-to-ebp
<span id="L36" class="LineNr">36 </span> c3/return
<span id="L37" class="LineNr">37 </span>
<span id="L38" class="LineNr">38 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
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@ -56,58 +56,59 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/120allocate.subx'>https://github.com/akkartik/mu/blob/main/baremetal/120allocate.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># Fill a region of memory with zeroes.</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxFunction">zero-out</span>: <span class="subxComment"># start: (addr byte), size: int</span>
<span id="L7" class="LineNr"> 7 </span> <span class="subxComment"># pseudocode:</span>
<span id="L8" class="LineNr"> 8 </span> <span class="subxComment"># curr/esi = start</span>
<span id="L9" class="LineNr"> 9 </span> <span class="subxComment"># i/ecx = 0</span>
<span id="L10" class="LineNr">10 </span> <span class="subxComment"># while true</span>
<span id="L11" class="LineNr">11 </span> <span class="subxComment"># if (i &gt;= size) break</span>
<span id="L12" class="LineNr">12 </span> <span class="subxComment"># *curr = 0</span>
<span id="L13" class="LineNr">13 </span> <span class="subxComment"># ++curr</span>
<span id="L14" class="LineNr">14 </span> <span class="subxComment"># ++i</span>
<span id="L15" class="LineNr">15 </span> <span class="subxComment">#</span>
<span id="L16" class="LineNr">16 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L17" class="LineNr">17 </span> 55/push-ebp
<span id="L18" class="LineNr">18 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L19" class="LineNr">19 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L20" class="LineNr">20 </span> 50/push-eax
<span id="L21" class="LineNr">21 </span> 51/push-ecx
<span id="L22" class="LineNr">22 </span> 52/push-edx
<span id="L23" class="LineNr">23 </span> 56/push-esi
<span id="L24" class="LineNr">24 </span> <span class="subxComment"># curr/esi = start</span>
<span id="L25" class="LineNr">25 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to esi</span>
<span id="L26" class="LineNr">26 </span> <span class="subxComment"># var i/ecx: int = 0</span>
<span id="L27" class="LineNr">27 </span> 31/xor 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear ecx</span>
<span id="L28" class="LineNr">28 </span> <span class="subxComment"># edx = size</span>
<span id="L29" class="LineNr">29 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to edx</span>
<span id="L30" class="LineNr">30 </span><span class="Constant">$zero-out:loop</span>:
<span id="L31" class="LineNr">31 </span> <span class="subxComment"># if (i &gt;= size) break</span>
<span id="L32" class="LineNr">32 </span> 39/compare 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare ecx with edx</span>
<span id="L33" class="LineNr">33 </span> 7d/jump-if-&gt;= $zero-out:end/disp8
<span id="L34" class="LineNr">34 </span> <span class="subxComment"># *curr = 0</span>
<span id="L35" class="LineNr">35 </span> c6 0/subop/copy-byte 0/mod/direct 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm8 <span class="subxComment"># copy byte to *esi</span>
<span id="L36" class="LineNr">36 </span> <span class="subxComment"># ++curr</span>
<span id="L37" class="LineNr">37 </span> 46/increment-esi
<span id="L38" class="LineNr">38 </span> <span class="subxComment"># ++i</span>
<span id="L39" class="LineNr">39 </span> 41/increment-ecx
<span id="L40" class="LineNr">40 </span> eb/jump $zero-out:<span class="Constant">loop</span>/disp8
<span id="L41" class="LineNr">41 </span><span class="Constant">$zero-out:end</span>:
<span id="L42" class="LineNr">42 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L43" class="LineNr">43 </span> 5e/pop-to-esi
<span id="L44" class="LineNr">44 </span> 5a/pop-to-edx
<span id="L45" class="LineNr">45 </span> 59/pop-to-ecx
<span id="L46" class="LineNr">46 </span> 58/pop-to-eax
<span id="L47" class="LineNr">47 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L48" class="LineNr">48 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L49" class="LineNr">49 </span> 5d/pop-to-ebp
<span id="L50" class="LineNr">50 </span> c3/return
<span id="L51" class="LineNr">51 </span>
<span id="L52" class="LineNr">52 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
<span id="L1" class="LineNr"> 1 </span>== code
<span id="L2" class="LineNr"> 2 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># Fill a region of memory with zeroes.</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxFunction">zero-out</span>: <span class="subxComment"># start: (addr byte), size: int</span>
<span id="L8" class="LineNr"> 8 </span> <span class="subxComment"># pseudocode:</span>
<span id="L9" class="LineNr"> 9 </span> <span class="subxComment"># curr/esi = start</span>
<span id="L10" class="LineNr">10 </span> <span class="subxComment"># i/ecx = 0</span>
<span id="L11" class="LineNr">11 </span> <span class="subxComment"># while true</span>
<span id="L12" class="LineNr">12 </span> <span class="subxComment"># if (i &gt;= size) break</span>
<span id="L13" class="LineNr">13 </span> <span class="subxComment"># *curr = 0</span>
<span id="L14" class="LineNr">14 </span> <span class="subxComment"># ++curr</span>
<span id="L15" class="LineNr">15 </span> <span class="subxComment"># ++i</span>
<span id="L16" class="LineNr">16 </span> <span class="subxComment">#</span>
<span id="L17" class="LineNr">17 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L18" class="LineNr">18 </span> 55/push-ebp
<span id="L19" class="LineNr">19 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L20" class="LineNr">20 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L21" class="LineNr">21 </span> 50/push-eax
<span id="L22" class="LineNr">22 </span> 51/push-ecx
<span id="L23" class="LineNr">23 </span> 52/push-edx
<span id="L24" class="LineNr">24 </span> 56/push-esi
<span id="L25" class="LineNr">25 </span> <span class="subxComment"># curr/esi = start</span>
<span id="L26" class="LineNr">26 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 6/r32/esi 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to esi</span>
<span id="L27" class="LineNr">27 </span> <span class="subxComment"># var i/ecx: int = 0</span>
<span id="L28" class="LineNr">28 </span> 31/xor 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># clear ecx</span>
<span id="L29" class="LineNr">29 </span> <span class="subxComment"># edx = size</span>
<span id="L30" class="LineNr">30 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to edx</span>
<span id="L31" class="LineNr">31 </span><span class="Constant">$zero-out:loop</span>:
<span id="L32" class="LineNr">32 </span> <span class="subxComment"># if (i &gt;= size) break</span>
<span id="L33" class="LineNr">33 </span> 39/compare 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare ecx with edx</span>
<span id="L34" class="LineNr">34 </span> 7d/jump-if-&gt;= $zero-out:end/disp8
<span id="L35" class="LineNr">35 </span> <span class="subxComment"># *curr = 0</span>
<span id="L36" class="LineNr">36 </span> c6 0/subop/copy-byte 0/mod/direct 6/rm32/esi <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm8 <span class="subxComment"># copy byte to *esi</span>
<span id="L37" class="LineNr">37 </span> <span class="subxComment"># ++curr</span>
<span id="L38" class="LineNr">38 </span> 46/increment-esi
<span id="L39" class="LineNr">39 </span> <span class="subxComment"># ++i</span>
<span id="L40" class="LineNr">40 </span> 41/increment-ecx
<span id="L41" class="LineNr">41 </span> eb/jump $zero-out:<span class="Constant">loop</span>/disp8
<span id="L42" class="LineNr">42 </span><span class="Constant">$zero-out:end</span>:
<span id="L43" class="LineNr">43 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L44" class="LineNr">44 </span> 5e/pop-to-esi
<span id="L45" class="LineNr">45 </span> 5a/pop-to-edx
<span id="L46" class="LineNr">46 </span> 59/pop-to-ecx
<span id="L47" class="LineNr">47 </span> 58/pop-to-eax
<span id="L48" class="LineNr">48 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L49" class="LineNr">49 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L50" class="LineNr">50 </span> 5d/pop-to-ebp
<span id="L51" class="LineNr">51 </span> c3/return
<span id="L52" class="LineNr">52 </span>
<span id="L53" class="LineNr">53 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
</body>
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2
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@ -104,7 +104,7 @@ if ('onhashchange' in window) {
<span id="L47" class="LineNr">47 </span> 89/&lt;- *<span class="SpecialChar"><a href='302stack_allocate.subx.html#L58'>Push-n-zero-bytes-esp</a></span> 4/r32/esp
<span id="L48" class="LineNr">48 </span> 81 0/subop/add *<span class="SpecialChar"><a href='302stack_allocate.subx.html#L58'>Push-n-zero-bytes-esp</a></span> 4/imm32
<span id="L49" class="LineNr">49 </span> 81 0/subop/add *(ebp+4) 4/imm32
<span id="L50" class="LineNr">50 </span> (<a href='120allocate.subx.html#L6'>zero-out</a> *<span class="SpecialChar"><a href='302stack_allocate.subx.html#L58'>Push-n-zero-bytes-esp</a></span> *(ebp+4)) <span class="subxComment"># n+4</span>
<span id="L50" class="LineNr">50 </span> (<a href='120allocate.subx.html#L7'>zero-out</a> *<span class="SpecialChar"><a href='302stack_allocate.subx.html#L58'>Push-n-zero-bytes-esp</a></span> *(ebp+4)) <span class="subxComment"># n+4</span>
<span id="L51" class="LineNr">51 </span><span class="Constant">$push-n-zero-bytes:epilogue</span>:
<span id="L52" class="LineNr">52 </span> 8b/-&gt; *<span class="SpecialChar"><a href='302stack_allocate.subx.html#L56'>Push-n-zero-bytes-ebp</a></span> 5/r32/ebp <span class="subxComment"># restore spill</span>
<span id="L53" class="LineNr">53 </span> c3/return

4
html/baremetal/309stream.subx.html generated
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@ -137,7 +137,7 @@ if ('onhashchange' in window) {
<span id="L81" class="LineNr"> 81 </span> 8b/-&gt; *(ebp+0x10) 1/r32/ecx
<span id="L82" class="LineNr"> 82 </span> 8d/copy-address *(eax+ecx) 1/r32/ecx
<span id="L83" class="LineNr"> 83 </span> <span class="subxComment">#</span>
<span id="L84" class="LineNr"> 84 </span> (<a href='108write.subx.html#L86'>_append-4</a> %edx %ebx %eax %ecx) <span class="subxComment"># =&gt; eax</span>
<span id="L84" class="LineNr"> 84 </span> (<a href='108write.subx.html#L87'>_append-4</a> %edx %ebx %eax %ecx) <span class="subxComment"># =&gt; eax</span>
<span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># s-&gt;write += n</span>
<span id="L86" class="LineNr"> 86 </span> 8b/-&gt; *(ebp+0x10) 1/r32/ecx
<span id="L87" class="LineNr"> 87 </span> 01/add-to *edi 1/r32/ecx
@ -183,7 +183,7 @@ if ('onhashchange' in window) {
<span id="L127" class="LineNr">127 </span> 8b/-&gt; *(ebp+0x10) 1/r32/ecx
<span id="L128" class="LineNr">128 </span> 8d/copy-address *(eax+ecx) 1/r32/ecx
<span id="L129" class="LineNr">129 </span> <span class="subxComment">#</span>
<span id="L130" class="LineNr">130 </span> (<a href='108write.subx.html#L86'>_append-4</a> %eax %ecx %edx %ebx) <span class="subxComment"># =&gt; eax</span>
<span id="L130" class="LineNr">130 </span> (<a href='108write.subx.html#L87'>_append-4</a> %eax %ecx %edx %ebx) <span class="subxComment"># =&gt; eax</span>
<span id="L131" class="LineNr">131 </span> <span class="subxComment"># s-&gt;read += n</span>
<span id="L132" class="LineNr">132 </span> 8b/-&gt; *(ebp+0x10) 1/r32/ecx
<span id="L133" class="LineNr">133 </span> 01/add-to *(esi+4) 1/r32/ecx

20
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@ -56,15 +56,17 @@ if ('onhashchange' in window) {
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># TODO: bring this back</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span><span class="subxMinorFunction">__check-mu-array-bounds</span>: <span class="subxComment"># index: int, elem-size: int, arr-size: int, function-name: (addr array byte), array-name: (addr array byte)</span>
<span id="L4" class="LineNr"> 4 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L5" class="LineNr"> 5 </span> 55/push-ebp
<span id="L6" class="LineNr"> 6 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L7" class="LineNr"> 7 </span><span class="Constant">$__check-mu-array-bounds:end</span>:
<span id="L8" class="LineNr"> 8 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L9" class="LineNr"> 9 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L10" class="LineNr">10 </span> 5d/pop-to-ebp
<span id="L11" class="LineNr">11 </span> c3/return
<span id="L3" class="LineNr"> 3 </span>== code
<span id="L4" class="LineNr"> 4 </span>
<span id="L5" class="LineNr"> 5 </span><span class="subxMinorFunction">__check-mu-array-bounds</span>: <span class="subxComment"># index: int, elem-size: int, arr-size: int, function-name: (addr array byte), array-name: (addr array byte)</span>
<span id="L6" class="LineNr"> 6 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L7" class="LineNr"> 7 </span> 55/push-ebp
<span id="L8" class="LineNr"> 8 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L9" class="LineNr"> 9 </span><span class="Constant">$__check-mu-array-bounds:end</span>:
<span id="L10" class="LineNr">10 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L11" class="LineNr">11 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L12" class="LineNr">12 </span> 5d/pop-to-ebp
<span id="L13" class="LineNr">13 </span> c3/return
</pre>
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32
html/baremetal/400.mu.html generated
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@ -17,6 +17,7 @@ a { color:inherit; }
.PreProc { color: #c000c0; }
.LineNr { }
.Constant { color: #008787; }
.muComment { color: #005faf; }
-->
</style>
@ -52,17 +53,26 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/400.mu'>https://github.com/akkartik/mu/blob/main/baremetal/400.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="PreProc">sig</span> <a href='101screen.subx.html#L3'>pixel</a> screen: (addr screen), x: int, y: int, color: int
<span id="L2" class="LineNr"> 2 </span><span class="PreProc">sig</span> <a href='102keyboard.subx.html#L3'>read-key</a> kbd: (addr keyboard)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: byte
<span id="L3" class="LineNr"> 3 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen: (addr screen), g: grapheme, x: int, y: int, color: int
<span id="L4" class="LineNr"> 4 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen: (addr screen)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int
<span id="L5" class="LineNr"> 5 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen: (addr screen), x: int, y: int
<span id="L6" class="LineNr"> 6 </span><span class="PreProc">sig</span> <a href='106stream.subx.html#L17'>clear-stream</a> f: (addr stream _)
<span id="L7" class="LineNr"> 7 </span><span class="PreProc">sig</span> <a href='106stream.subx.html#L56'>rewind-stream</a> f: (addr stream _)
<span id="L8" class="LineNr"> 8 </span><span class="PreProc">sig</span> <a href='108write.subx.html#L5'>write</a> f: (addr stream byte), s: (addr array byte)
<span id="L9" class="LineNr"> 9 </span><span class="PreProc">sig</span> <a href='115write-byte.subx.html#L6'>append-byte</a> f: (addr stream byte), n: int
<span id="L10" class="LineNr">10 </span><span class="PreProc">sig</span> <a href='112read-byte.subx.html#L9'>read-byte</a> s: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: byte
<span id="L11" class="LineNr">11 </span><span class="PreProc">sig</span> <a href='309stream.subx.html#L6'>stream-empty?</a> s: (addr stream _)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: boolean
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># screen</span>
<span id="L2" class="LineNr"> 2 </span><span class="PreProc">sig</span> <a href='101screen.subx.html#L5'>pixel</a> screen: (addr screen), x: int, y: int, color: int
<span id="L3" class="LineNr"> 3 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L5'>draw-grapheme</a> screen: (addr screen), g: grapheme, x: int, y: int, color: int
<span id="L4" class="LineNr"> 4 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen: (addr screen)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int
<span id="L5" class="LineNr"> 5 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen: (addr screen), x: int, y: int
<span id="L6" class="LineNr"> 6 </span>
<span id="L7" class="LineNr"> 7 </span><span class="muComment"># keyboard</span>
<span id="L8" class="LineNr"> 8 </span><span class="PreProc">sig</span> <a href='102keyboard.subx.html#L6'>read-key</a> kbd: (addr keyboard)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: byte
<span id="L9" class="LineNr"> 9 </span>
<span id="L10" class="LineNr">10 </span><span class="muComment"># tests</span>
<span id="L11" class="LineNr">11 </span><span class="PreProc">sig</span> <a href='104test.subx.html#L5'>count-test-failure</a>
<span id="L12" class="LineNr">12 </span><span class="PreProc">sig</span> <a href='104test.subx.html#L17'>num-test-failures</a><span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int
<span id="L13" class="LineNr">13 </span>
<span id="L14" class="LineNr">14 </span><span class="muComment"># streams</span>
<span id="L15" class="LineNr">15 </span><span class="PreProc">sig</span> <a href='106stream.subx.html#L17'>clear-stream</a> f: (addr stream _)
<span id="L16" class="LineNr">16 </span><span class="PreProc">sig</span> <a href='106stream.subx.html#L56'>rewind-stream</a> f: (addr stream _)
<span id="L17" class="LineNr">17 </span><span class="PreProc">sig</span> <a href='108write.subx.html#L6'>write</a> f: (addr stream byte), s: (addr array byte)
<span id="L18" class="LineNr">18 </span><span class="PreProc">sig</span> <a href='115write-byte.subx.html#L7'>append-byte</a> f: (addr stream byte), n: int
<span id="L19" class="LineNr">19 </span><span class="PreProc">sig</span> <a href='112read-byte.subx.html#L10'>read-byte</a> s: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: byte
<span id="L20" class="LineNr">20 </span><span class="PreProc">sig</span> <a href='309stream.subx.html#L6'>stream-empty?</a> s: (addr stream _)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: boolean
</pre>
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12
html/baremetal/403unicode.mu.html generated
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@ -155,7 +155,7 @@ if ('onhashchange' in window) {
<span id="L97" class="LineNr"> 97 </span> <span class="PreProc">break-if-=</span>
<span id="L98" class="LineNr"> 98 </span> <span class="PreProc">return</span> <span class="Constant">0xffffffff</span>
<span id="L99" class="LineNr"> 99 </span> <span class="Delimiter">}</span>
<span id="L100" class="LineNr">100 </span> <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='112read-byte.subx.html#L9'>read-byte</a> in
<span id="L100" class="LineNr">100 </span> <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='112read-byte.subx.html#L10'>read-byte</a> in
<span id="L101" class="LineNr">101 </span> <span class="PreProc">var</span> num-trailers/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L102" class="LineNr">102 </span> $read-grapheme:compute-length: <span class="Delimiter">{</span>
<span id="L103" class="LineNr">103 </span> <span class="muComment"># single byte: just return it</span>
@ -201,7 +201,7 @@ if ('onhashchange' in window) {
<span id="L143" class="LineNr">143 </span> <span class="Delimiter">{</span>
<span id="L144" class="LineNr">144 </span> compare num-trailers, <span class="Constant">0</span>
<span id="L145" class="LineNr">145 </span> <span class="PreProc">break-if-&lt;=</span>
<span id="L146" class="LineNr">146 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='112read-byte.subx.html#L9'>read-byte</a> in
<span id="L146" class="LineNr">146 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='112read-byte.subx.html#L10'>read-byte</a> in
<span id="L147" class="LineNr">147 </span> <span class="PreProc">var</span> tmp2/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy tmp
<span id="L148" class="LineNr">148 </span> tmp2 <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L159'>shift-left-bytes</a> tmp2, num-byte-shifts
<span id="L149" class="LineNr">149 </span> result <span class="SpecialChar">&lt;-</span> or tmp2
@ -234,19 +234,19 @@ if ('onhashchange' in window) {
<span id="L176" class="LineNr">176 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='403unicode.mu.html#L176'>write-grapheme</a></span> out: (addr stream byte), g: grapheme <span class="Delimiter">{</span>
<span id="L177" class="LineNr">177 </span>$write-grapheme:body: <span class="Delimiter">{</span>
<span id="L178" class="LineNr">178 </span> <span class="PreProc">var</span> c/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy g
<span id="L179" class="LineNr">179 </span> <a href='115write-byte.subx.html#L6'>append-byte</a> out, c <span class="muComment"># first byte is always written</span>
<span id="L179" class="LineNr">179 </span> <a href='115write-byte.subx.html#L7'>append-byte</a> out, c <span class="muComment"># first byte is always written</span>
<span id="L180" class="LineNr">180 </span> c <span class="SpecialChar">&lt;-</span> shift-right <span class="Constant">8</span>
<span id="L181" class="LineNr">181 </span> compare c, <span class="Constant">0</span>
<span id="L182" class="LineNr">182 </span> <span class="PreProc">break-if-=</span> $write-grapheme:body
<span id="L183" class="LineNr">183 </span> <a href='115write-byte.subx.html#L6'>append-byte</a> out, c
<span id="L183" class="LineNr">183 </span> <a href='115write-byte.subx.html#L7'>append-byte</a> out, c
<span id="L184" class="LineNr">184 </span> c <span class="SpecialChar">&lt;-</span> shift-right <span class="Constant">8</span>
<span id="L185" class="LineNr">185 </span> compare c, <span class="Constant">0</span>
<span id="L186" class="LineNr">186 </span> <span class="PreProc">break-if-=</span> $write-grapheme:body
<span id="L187" class="LineNr">187 </span> <a href='115write-byte.subx.html#L6'>append-byte</a> out, c
<span id="L187" class="LineNr">187 </span> <a href='115write-byte.subx.html#L7'>append-byte</a> out, c
<span id="L188" class="LineNr">188 </span> c <span class="SpecialChar">&lt;-</span> shift-right <span class="Constant">8</span>
<span id="L189" class="LineNr">189 </span> compare c, <span class="Constant">0</span>
<span id="L190" class="LineNr">190 </span> <span class="PreProc">break-if-=</span> $write-grapheme:body
<span id="L191" class="LineNr">191 </span> <a href='115write-byte.subx.html#L6'>append-byte</a> out, c
<span id="L191" class="LineNr">191 </span> <a href='115write-byte.subx.html#L7'>append-byte</a> out, c
<span id="L192" class="LineNr">192 </span><span class="Delimiter">}</span>
<span id="L193" class="LineNr">193 </span><span class="Delimiter">}</span>
</pre>

79
html/baremetal/500clear-screen.mu.html generated Normal file
View File

@ -0,0 +1,79 @@
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - baremetal/500clear-screen.mu</title>
<meta name="Generator" content="Vim/8.1">
<meta name="plugin-version" content="vim8.1_v1">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.PreProc { color: #c000c0; }
.LineNr { }
.Constant { color: #008787; }
.SpecialChar { color: #d70000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.muComment { color: #005faf; }
-->
</style>
<script type='text/javascript'>
<!--
/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
var lineNum;
lineNum = window.location.hash;
lineNum = lineNum.substr(1); /* strip off '#' */
if (lineNum.indexOf('L') == -1) {
lineNum = 'L'+lineNum;
}
var lineElem = document.getElementById(lineNum);
/* Always jump to new location even if the line was hidden inside a fold, or
* we corrected the raw number to a line ID.
*/
if (lineElem) {
lineElem.scrollIntoView(true);
}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
}
-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/500clear-screen.mu'>https://github.com/akkartik/mu/blob/main/baremetal/500clear-screen.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='500clear-screen.mu.html#L1'>clear-screen</a></span> screen: (addr screen) <span class="Delimiter">{</span>
<span id="L2" class="LineNr"> 2 </span> <span class="PreProc">var</span> y/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L3" class="LineNr"> 3 </span> <span class="Delimiter">{</span>
<span id="L4" class="LineNr"> 4 </span> compare y, <span class="Constant">0x300</span> <span class="muComment"># 768</span>
<span id="L5" class="LineNr"> 5 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L6" class="LineNr"> 6 </span> <span class="PreProc">var</span> x/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L7" class="LineNr"> 7 </span> <span class="Delimiter">{</span>
<span id="L8" class="LineNr"> 8 </span> compare x, <span class="Constant">0x400</span> <span class="muComment"># 1024</span>
<span id="L9" class="LineNr"> 9 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L10" class="LineNr">10 </span> <a href='101screen.subx.html#L5'>pixel</a> <span class="Constant">0</span>, x, y, <span class="Constant">0</span> <span class="muComment"># black</span>
<span id="L11" class="LineNr">11 </span> x <span class="SpecialChar">&lt;-</span> increment
<span id="L12" class="LineNr">12 </span> <span class="PreProc">loop</span>
<span id="L13" class="LineNr">13 </span> <span class="Delimiter">}</span>
<span id="L14" class="LineNr">14 </span> y <span class="SpecialChar">&lt;-</span> increment
<span id="L15" class="LineNr">15 </span> <span class="PreProc">loop</span>
<span id="L16" class="LineNr">16 </span> <span class="Delimiter">}</span>
<span id="L17" class="LineNr">17 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->

307
html/baremetal/501draw-text.mu.html generated
View File

@ -61,60 +61,60 @@ if ('onhashchange' in window) {
<span id="L3" class="LineNr"> 3 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L3'>cursor-left</a></span> screen: (addr screen) <span class="Delimiter">{</span>
<span id="L4" class="LineNr"> 4 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L5" class="LineNr"> 5 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L6" class="LineNr"> 6 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L6" class="LineNr"> 6 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L7" class="LineNr"> 7 </span> compare cursor-x, <span class="Constant">0</span>
<span id="L8" class="LineNr"> 8 </span> <span class="Delimiter">{</span>
<span id="L9" class="LineNr"> 9 </span> <span class="PreProc">break-if-&gt;</span>
<span id="L10" class="LineNr"> 10 </span> <span class="PreProc">return</span>
<span id="L11" class="LineNr"> 11 </span> <span class="Delimiter">}</span>
<span id="L12" class="LineNr"> 12 </span> cursor-x <span class="SpecialChar">&lt;-</span> subtract <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L13" class="LineNr"> 13 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, cursor-x, cursor-y
<span id="L13" class="LineNr"> 13 </span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen, cursor-x, cursor-y
<span id="L14" class="LineNr"> 14 </span><span class="Delimiter">}</span>
<span id="L15" class="LineNr"> 15 </span>
<span id="L16" class="LineNr"> 16 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L16'>cursor-right</a></span> screen: (addr screen) <span class="Delimiter">{</span>
<span id="L17" class="LineNr"> 17 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L18" class="LineNr"> 18 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L19" class="LineNr"> 19 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L19" class="LineNr"> 19 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L20" class="LineNr"> 20 </span> compare cursor-x, <span class="Constant">0x400</span> <span class="muComment"># screen-width</span>
<span id="L21" class="LineNr"> 21 </span> <span class="Delimiter">{</span>
<span id="L22" class="LineNr"> 22 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L23" class="LineNr"> 23 </span> <span class="PreProc">return</span>
<span id="L24" class="LineNr"> 24 </span> <span class="Delimiter">}</span>
<span id="L25" class="LineNr"> 25 </span> cursor-x <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L26" class="LineNr"> 26 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, cursor-x, cursor-y
<span id="L26" class="LineNr"> 26 </span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen, cursor-x, cursor-y
<span id="L27" class="LineNr"> 27 </span><span class="Delimiter">}</span>
<span id="L28" class="LineNr"> 28 </span>
<span id="L29" class="LineNr"> 29 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L29'>cursor-up</a></span> screen: (addr screen) <span class="Delimiter">{</span>
<span id="L30" class="LineNr"> 30 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L31" class="LineNr"> 31 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L32" class="LineNr"> 32 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L32" class="LineNr"> 32 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L33" class="LineNr"> 33 </span> compare cursor-y, <span class="Constant">0</span>
<span id="L34" class="LineNr"> 34 </span> <span class="Delimiter">{</span>
<span id="L35" class="LineNr"> 35 </span> <span class="PreProc">break-if-&gt;</span>
<span id="L36" class="LineNr"> 36 </span> <span class="PreProc">return</span>
<span id="L37" class="LineNr"> 37 </span> <span class="Delimiter">}</span>
<span id="L38" class="LineNr"> 38 </span> cursor-y <span class="SpecialChar">&lt;-</span> subtract <span class="Constant">0x10</span> <span class="muComment"># screen-height</span>
<span id="L39" class="LineNr"> 39 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, cursor-x, cursor-y
<span id="L39" class="LineNr"> 39 </span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen, cursor-x, cursor-y
<span id="L40" class="LineNr"> 40 </span><span class="Delimiter">}</span>
<span id="L41" class="LineNr"> 41 </span>
<span id="L42" class="LineNr"> 42 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L42'>cursor-down</a></span> screen: (addr screen) <span class="Delimiter">{</span>
<span id="L43" class="LineNr"> 43 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L44" class="LineNr"> 44 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L45" class="LineNr"> 45 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L45" class="LineNr"> 45 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L46" class="LineNr"> 46 </span> compare cursor-y, <span class="Constant">0x300</span> <span class="muComment"># screen-height</span>
<span id="L47" class="LineNr"> 47 </span> <span class="Delimiter">{</span>
<span id="L48" class="LineNr"> 48 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L49" class="LineNr"> 49 </span> <span class="PreProc">return</span>
<span id="L50" class="LineNr"> 50 </span> <span class="Delimiter">}</span>
<span id="L51" class="LineNr"> 51 </span> cursor-y <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># screen-height</span>
<span id="L52" class="LineNr"> 52 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, cursor-x, cursor-y
<span id="L52" class="LineNr"> 52 </span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen, cursor-x, cursor-y
<span id="L53" class="LineNr"> 53 </span><span class="Delimiter">}</span>
<span id="L54" class="LineNr"> 54 </span>
<span id="L55" class="LineNr"> 55 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L55'>draw-grapheme-at-cursor</a></span> screen: (addr screen), g: grapheme, color: int <span class="Delimiter">{</span>
<span id="L56" class="LineNr"> 56 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L57" class="LineNr"> 57 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L58" class="LineNr"> 58 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L59" class="LineNr"> 59 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, cursor-x, cursor-y, color
<span id="L58" class="LineNr"> 58 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L59" class="LineNr"> 59 </span> <a href='103grapheme.subx.html#L5'>draw-grapheme</a> screen, g, cursor-x, cursor-y, color
<span id="L60" class="LineNr"> 60 </span><span class="Delimiter">}</span>
<span id="L61" class="LineNr"> 61 </span>
<span id="L62" class="LineNr"> 62 </span><span class="muComment"># draw a single line of text from x, y to xmax</span>
@ -123,7 +123,7 @@ if ('onhashchange' in window) {
<span id="L65" class="LineNr"> 65 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L65'>draw-text-rightward</a></span> screen: (addr screen), text: (addr array byte), x: int, xmax: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L66" class="LineNr"> 66 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L67" class="LineNr"> 67 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L68" class="LineNr"> 68 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L68" class="LineNr"> 68 </span> <a href='108write.subx.html#L6'>write</a> stream, text
<span id="L69" class="LineNr"> 69 </span> <span class="muComment"># check if we have enough space</span>
<span id="L70" class="LineNr"> 70 </span> <span class="PreProc">var</span> xcurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy x
<span id="L71" class="LineNr"> 71 </span> <span class="Delimiter">{</span>
@ -147,18 +147,18 @@ if ('onhashchange' in window) {
<span id="L89" class="LineNr"> 89 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L90" class="LineNr"> 90 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L91" class="LineNr"> 91 </span> <span class="PreProc">break-if-=</span>
<span id="L92" class="LineNr"> 92 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, xcurr, y, color
<span id="L92" class="LineNr"> 92 </span> <a href='103grapheme.subx.html#L5'>draw-grapheme</a> screen, g, xcurr, y, color
<span id="L93" class="LineNr"> 93 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L94" class="LineNr"> 94 </span> <span class="PreProc">loop</span>
<span id="L95" class="LineNr"> 95 </span> <span class="Delimiter">}</span>
<span id="L96" class="LineNr"> 96 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, xcurr, y
<span id="L96" class="LineNr"> 96 </span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen, xcurr, y
<span id="L97" class="LineNr"> 97 </span> <span class="PreProc">return</span> xcurr
<span id="L98" class="LineNr"> 98 </span><span class="Delimiter">}</span>
<span id="L99" class="LineNr"> 99 </span>
<span id="L100" class="LineNr">100 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L100'>draw-text-rightward-from-cursor</a></span> screen: (addr screen), text: (addr array byte), xmax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L101" class="LineNr">101 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L102" class="LineNr">102 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L103" class="LineNr">103 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L103" class="LineNr">103 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L104" class="LineNr">104 </span> <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L65'>draw-text-rightward</a> screen, text, cursor-x, xmax, cursor-y, color
<span id="L105" class="LineNr">105 </span> <span class="PreProc">return</span> result
<span id="L106" class="LineNr">106 </span><span class="Delimiter">}</span>
@ -170,7 +170,7 @@ if ('onhashchange' in window) {
<span id="L112" class="LineNr">112 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L112'>draw-text-wrapping-right-then-down</a></span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L113" class="LineNr">113 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L114" class="LineNr">114 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L115" class="LineNr">115 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L115" class="LineNr">115 </span> <a href='108write.subx.html#L6'>write</a> stream, text
<span id="L116" class="LineNr">116 </span> <span class="muComment"># check if we have enough space</span>
<span id="L117" class="LineNr">117 </span> <span class="PreProc">var</span> xcurr/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy x
<span id="L118" class="LineNr">118 </span> <span class="PreProc">var</span> ycurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy y
@ -202,7 +202,7 @@ if ('onhashchange' in window) {
<span id="L144" class="LineNr">144 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L145" class="LineNr">145 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L146" class="LineNr">146 </span> <span class="PreProc">break-if-=</span>
<span id="L147" class="LineNr">147 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, xcurr, ycurr, color
<span id="L147" class="LineNr">147 </span> <a href='103grapheme.subx.html#L5'>draw-grapheme</a> screen, g, xcurr, ycurr, color
<span id="L148" class="LineNr">148 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L149" class="LineNr">149 </span> compare xcurr, xmax
<span id="L150" class="LineNr">150 </span> <span class="Delimiter">{</span>
@ -212,7 +212,7 @@ if ('onhashchange' in window) {
<span id="L154" class="LineNr">154 </span> <span class="Delimiter">}</span>
<span id="L155" class="LineNr">155 </span> <span class="PreProc">loop</span>
<span id="L156" class="LineNr">156 </span> <span class="Delimiter">}</span>
<span id="L157" class="LineNr">157 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, xcurr, ycurr
<span id="L157" class="LineNr">157 </span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen, xcurr, ycurr
<span id="L158" class="LineNr">158 </span> <span class="PreProc">return</span> xcurr, ycurr
<span id="L159" class="LineNr">159 </span><span class="Delimiter">}</span>
<span id="L160" class="LineNr">160 </span>
@ -223,10 +223,10 @@ if ('onhashchange' in window) {
<span id="L165" class="LineNr">165 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L166" class="LineNr">166 </span><span class="Delimiter">}</span>
<span id="L167" class="LineNr">167 </span>
<span id="L168" class="LineNr">168 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L168'>draw-text-wrapping-right-then-down-from-cursor</a></span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L168" class="LineNr">168 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L168'>draw-text-wrapping-right-then-down-from-cursor</a></span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int <span class="Delimiter">{</span>
<span id="L169" class="LineNr">169 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L170" class="LineNr">170 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L171" class="LineNr">171 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L171" class="LineNr">171 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L172" class="LineNr">172 </span> <span class="PreProc">var</span> end-x/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy cursor-x
<span id="L173" class="LineNr">173 </span> end-x <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L174" class="LineNr">174 </span> compare end-x, xmax
@ -236,146 +236,137 @@ if ('onhashchange' in window) {
<span id="L178" class="LineNr">178 </span> cursor-y <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L179" class="LineNr">179 </span> <span class="Delimiter">}</span>
<span id="L180" class="LineNr">180 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L112'>draw-text-wrapping-right-then-down</a> screen, text, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color
<span id="L181" class="LineNr">181 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L182" class="LineNr">182 </span><span class="Delimiter">}</span>
<span id="L183" class="LineNr">183 </span>
<span id="L184" class="LineNr">184 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L184'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a></span> screen: (addr screen), text: (addr array byte), color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L185" class="LineNr">185 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L186" class="LineNr">186 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L187" class="LineNr">187 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L168'>draw-text-wrapping-right-then-down-from-cursor</a> screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, color <span class="muComment"># 1024, 768</span>
<span id="L188" class="LineNr">188 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L189" class="LineNr">189 </span><span class="Delimiter">}</span>
<span id="L190" class="LineNr">190 </span>
<span id="L191" class="LineNr">191 </span><span class="muComment">## Text direction: down then right</span>
<span id="L192" class="LineNr">192 </span>
<span id="L193" class="LineNr">193 </span><span class="muComment"># draw a single line of text vertically from x, y to ymax</span>
<span id="L194" class="LineNr">194 </span><span class="muComment"># return the next 'y' coordinate</span>
<span id="L195" class="LineNr">195 </span><span class="muComment"># if there isn't enough space, return 0 without modifying the screen</span>
<span id="L196" class="LineNr">196 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L196'>draw-text-downward</a></span> screen: (addr screen), text: (addr array byte), x: int, y: int, ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L197" class="LineNr">197 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L198" class="LineNr">198 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L199" class="LineNr">199 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L200" class="LineNr">200 </span> <span class="muComment"># check if we have enough space</span>
<span id="L201" class="LineNr">201 </span> <span class="PreProc">var</span> ycurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy y
<span id="L202" class="LineNr">202 </span> <span class="Delimiter">{</span>
<span id="L203" class="LineNr">203 </span> compare ycurr, ymax
<span id="L204" class="LineNr">204 </span> <span class="PreProc">break-if-&gt;</span>
<span id="L205" class="LineNr">205 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L206" class="LineNr">206 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L207" class="LineNr">207 </span> <span class="PreProc">break-if-=</span>
<span id="L208" class="LineNr">208 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L209" class="LineNr">209 </span> <span class="PreProc">loop</span>
<span id="L210" class="LineNr">210 </span> <span class="Delimiter">}</span>
<span id="L211" class="LineNr">211 </span> compare ycurr, ymax
<span id="L212" class="LineNr">212 </span> <span class="Delimiter">{</span>
<span id="L213" class="LineNr">213 </span> <span class="PreProc">break-if-&lt;=</span>
<span id="L214" class="LineNr">214 </span> <span class="PreProc">return</span> <span class="Constant">0</span>
<span id="L215" class="LineNr">215 </span> <span class="Delimiter">}</span>
<span id="L216" class="LineNr">216 </span> <span class="muComment"># we do; actually draw</span>
<span id="L217" class="LineNr">217 </span> <a href='106stream.subx.html#L56'>rewind-stream</a> stream
<span id="L218" class="LineNr">218 </span> ycurr <span class="SpecialChar">&lt;-</span> copy y
<span id="L219" class="LineNr">219 </span> <span class="Delimiter">{</span>
<span id="L220" class="LineNr">220 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L221" class="LineNr">221 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L222" class="LineNr">222 </span> <span class="PreProc">break-if-=</span>
<span id="L223" class="LineNr">223 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, x, ycurr, color
<span id="L224" class="LineNr">224 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L225" class="LineNr">225 </span> <span class="PreProc">loop</span>
<span id="L226" class="LineNr">226 </span> <span class="Delimiter">}</span>
<span id="L227" class="LineNr">227 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, x, ycurr
<span id="L228" class="LineNr">228 </span> <span class="PreProc">return</span> ycurr
<span id="L229" class="LineNr">229 </span><span class="Delimiter">}</span>
<span id="L230" class="LineNr">230 </span>
<span id="L231" class="LineNr">231 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L231'>draw-text-downward-from-cursor</a></span> screen: (addr screen), text: (addr array byte), ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L232" class="LineNr">232 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L233" class="LineNr">233 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L234" class="LineNr">234 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L235" class="LineNr">235 </span> <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L196'>draw-text-downward</a> screen, text, cursor-x, cursor-y, ymax, color
<span id="L236" class="LineNr">236 </span> <span class="PreProc">return</span> result
<span id="L237" class="LineNr">237 </span><span class="Delimiter">}</span>
<span id="L238" class="LineNr">238 </span>
<span id="L239" class="LineNr">239 </span><span class="muComment"># draw text down and right in the rectangle from (xmin, ymin) to (xmax, ymax), starting from (x, y), wrapping as necessary</span>
<span id="L240" class="LineNr">240 </span><span class="muComment"># return the next (x, y) coordinate in raster order where drawing stopped</span>
<span id="L241" class="LineNr">241 </span><span class="muComment"># that way the caller can draw more if given the same min and max bounding-box.</span>
<span id="L242" class="LineNr">242 </span><span class="muComment"># if there isn't enough space, return 0 without modifying the screen</span>
<span id="L243" class="LineNr">243 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L243'>draw-text-wrapping-down-then-right</a></span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L244" class="LineNr">244 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L245" class="LineNr">245 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L246" class="LineNr">246 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L247" class="LineNr">247 </span> <span class="muComment"># check if we have enough space</span>
<span id="L248" class="LineNr">248 </span> <span class="PreProc">var</span> xcurr/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy x
<span id="L249" class="LineNr">249 </span> <span class="PreProc">var</span> ycurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy y
<span id="L250" class="LineNr">250 </span> <span class="Delimiter">{</span>
<span id="L251" class="LineNr">251 </span> compare xcurr, xmax
<span id="L252" class="LineNr">252 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L253" class="LineNr">253 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L254" class="LineNr">254 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L255" class="LineNr">255 </span> <span class="PreProc">break-if-=</span>
<span id="L256" class="LineNr">256 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L257" class="LineNr">257 </span> compare ycurr, ymax
<span id="L258" class="LineNr">258 </span> <span class="Delimiter">{</span>
<span id="L259" class="LineNr">259 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L260" class="LineNr">260 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L261" class="LineNr">261 </span> ycurr <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L262" class="LineNr">262 </span> <span class="Delimiter">}</span>
<span id="L263" class="LineNr">263 </span> <span class="PreProc">loop</span>
<span id="L181" class="LineNr">181 </span><span class="Delimiter">}</span>
<span id="L182" class="LineNr">182 </span>
<span id="L183" class="LineNr">183 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L183'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a></span> screen: (addr screen), text: (addr array byte), color: int <span class="Delimiter">{</span>
<span id="L184" class="LineNr">184 </span> <a href='501draw-text.mu.html#L168'>draw-text-wrapping-right-then-down-from-cursor</a> screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, color <span class="muComment"># 1024, 768</span>
<span id="L185" class="LineNr">185 </span><span class="Delimiter">}</span>
<span id="L186" class="LineNr">186 </span>
<span id="L187" class="LineNr">187 </span><span class="muComment">## Text direction: down then right</span>
<span id="L188" class="LineNr">188 </span>
<span id="L189" class="LineNr">189 </span><span class="muComment"># draw a single line of text vertically from x, y to ymax</span>
<span id="L190" class="LineNr">190 </span><span class="muComment"># return the next 'y' coordinate</span>
<span id="L191" class="LineNr">191 </span><span class="muComment"># if there isn't enough space, return 0 without modifying the screen</span>
<span id="L192" class="LineNr">192 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L192'>draw-text-downward</a></span> screen: (addr screen), text: (addr array byte), x: int, y: int, ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L193" class="LineNr">193 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L194" class="LineNr">194 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L195" class="LineNr">195 </span> <a href='108write.subx.html#L6'>write</a> stream, text
<span id="L196" class="LineNr">196 </span> <span class="muComment"># check if we have enough space</span>
<span id="L197" class="LineNr">197 </span> <span class="PreProc">var</span> ycurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy y
<span id="L198" class="LineNr">198 </span> <span class="Delimiter">{</span>
<span id="L199" class="LineNr">199 </span> compare ycurr, ymax
<span id="L200" class="LineNr">200 </span> <span class="PreProc">break-if-&gt;</span>
<span id="L201" class="LineNr">201 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L202" class="LineNr">202 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L203" class="LineNr">203 </span> <span class="PreProc">break-if-=</span>
<span id="L204" class="LineNr">204 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L205" class="LineNr">205 </span> <span class="PreProc">loop</span>
<span id="L206" class="LineNr">206 </span> <span class="Delimiter">}</span>
<span id="L207" class="LineNr">207 </span> compare ycurr, ymax
<span id="L208" class="LineNr">208 </span> <span class="Delimiter">{</span>
<span id="L209" class="LineNr">209 </span> <span class="PreProc">break-if-&lt;=</span>
<span id="L210" class="LineNr">210 </span> <span class="PreProc">return</span> <span class="Constant">0</span>
<span id="L211" class="LineNr">211 </span> <span class="Delimiter">}</span>
<span id="L212" class="LineNr">212 </span> <span class="muComment"># we do; actually draw</span>
<span id="L213" class="LineNr">213 </span> <a href='106stream.subx.html#L56'>rewind-stream</a> stream
<span id="L214" class="LineNr">214 </span> ycurr <span class="SpecialChar">&lt;-</span> copy y
<span id="L215" class="LineNr">215 </span> <span class="Delimiter">{</span>
<span id="L216" class="LineNr">216 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L217" class="LineNr">217 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L218" class="LineNr">218 </span> <span class="PreProc">break-if-=</span>
<span id="L219" class="LineNr">219 </span> <a href='103grapheme.subx.html#L5'>draw-grapheme</a> screen, g, x, ycurr, color
<span id="L220" class="LineNr">220 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L221" class="LineNr">221 </span> <span class="PreProc">loop</span>
<span id="L222" class="LineNr">222 </span> <span class="Delimiter">}</span>
<span id="L223" class="LineNr">223 </span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen, x, ycurr
<span id="L224" class="LineNr">224 </span> <span class="PreProc">return</span> ycurr
<span id="L225" class="LineNr">225 </span><span class="Delimiter">}</span>
<span id="L226" class="LineNr">226 </span>
<span id="L227" class="LineNr">227 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L227'>draw-text-downward-from-cursor</a></span> screen: (addr screen), text: (addr array byte), ymax: int, color: int <span class="Delimiter">{</span>
<span id="L228" class="LineNr">228 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L229" class="LineNr">229 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L230" class="LineNr">230 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L231" class="LineNr">231 </span> <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L192'>draw-text-downward</a> screen, text, cursor-x, cursor-y, ymax, color
<span id="L232" class="LineNr">232 </span><span class="Delimiter">}</span>
<span id="L233" class="LineNr">233 </span>
<span id="L234" class="LineNr">234 </span><span class="muComment"># draw text down and right in the rectangle from (xmin, ymin) to (xmax, ymax), starting from (x, y), wrapping as necessary</span>
<span id="L235" class="LineNr">235 </span><span class="muComment"># return the next (x, y) coordinate in raster order where drawing stopped</span>
<span id="L236" class="LineNr">236 </span><span class="muComment"># that way the caller can draw more if given the same min and max bounding-box.</span>
<span id="L237" class="LineNr">237 </span><span class="muComment"># if there isn't enough space, return 0 without modifying the screen</span>
<span id="L238" class="LineNr">238 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L238'>draw-text-wrapping-down-then-right</a></span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L239" class="LineNr">239 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L240" class="LineNr">240 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L241" class="LineNr">241 </span> <a href='108write.subx.html#L6'>write</a> stream, text
<span id="L242" class="LineNr">242 </span> <span class="muComment"># check if we have enough space</span>
<span id="L243" class="LineNr">243 </span> <span class="PreProc">var</span> xcurr/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy x
<span id="L244" class="LineNr">244 </span> <span class="PreProc">var</span> ycurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy y
<span id="L245" class="LineNr">245 </span> <span class="Delimiter">{</span>
<span id="L246" class="LineNr">246 </span> compare xcurr, xmax
<span id="L247" class="LineNr">247 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L248" class="LineNr">248 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L249" class="LineNr">249 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L250" class="LineNr">250 </span> <span class="PreProc">break-if-=</span>
<span id="L251" class="LineNr">251 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L252" class="LineNr">252 </span> compare ycurr, ymax
<span id="L253" class="LineNr">253 </span> <span class="Delimiter">{</span>
<span id="L254" class="LineNr">254 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L255" class="LineNr">255 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L256" class="LineNr">256 </span> ycurr <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L257" class="LineNr">257 </span> <span class="Delimiter">}</span>
<span id="L258" class="LineNr">258 </span> <span class="PreProc">loop</span>
<span id="L259" class="LineNr">259 </span> <span class="Delimiter">}</span>
<span id="L260" class="LineNr">260 </span> compare xcurr, xmax
<span id="L261" class="LineNr">261 </span> <span class="Delimiter">{</span>
<span id="L262" class="LineNr">262 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L263" class="LineNr">263 </span> <span class="PreProc">return</span> <span class="Constant">0</span>, <span class="Constant">0</span>
<span id="L264" class="LineNr">264 </span> <span class="Delimiter">}</span>
<span id="L265" class="LineNr">265 </span> compare xcurr, xmax
<span id="L266" class="LineNr">266 </span> <span class="Delimiter">{</span>
<span id="L267" class="LineNr">267 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L268" class="LineNr">268 </span> <span class="PreProc">return</span> <span class="Constant">0</span>, <span class="Constant">0</span>
<span id="L269" class="LineNr">269 </span> <span class="Delimiter">}</span>
<span id="L270" class="LineNr">270 </span> <span class="muComment"># we do; actually draw</span>
<span id="L271" class="LineNr">271 </span> <a href='106stream.subx.html#L56'>rewind-stream</a> stream
<span id="L272" class="LineNr">272 </span> xcurr <span class="SpecialChar">&lt;-</span> copy x
<span id="L273" class="LineNr">273 </span> ycurr <span class="SpecialChar">&lt;-</span> copy y
<span id="L274" class="LineNr">274 </span> <span class="Delimiter">{</span>
<span id="L275" class="LineNr">275 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L276" class="LineNr">276 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L277" class="LineNr">277 </span> <span class="PreProc">break-if-=</span>
<span id="L278" class="LineNr">278 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, xcurr, ycurr, color
<span id="L279" class="LineNr">279 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L280" class="LineNr">280 </span> compare ycurr, ymax
<span id="L281" class="LineNr">281 </span> <span class="Delimiter">{</span>
<span id="L282" class="LineNr">282 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L283" class="LineNr">283 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L284" class="LineNr">284 </span> ycurr <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L285" class="LineNr">285 </span> <span class="Delimiter">}</span>
<span id="L286" class="LineNr">286 </span> <span class="PreProc">loop</span>
<span id="L287" class="LineNr">287 </span> <span class="Delimiter">}</span>
<span id="L288" class="LineNr">288 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, xcurr, ycurr
<span id="L289" class="LineNr">289 </span> <span class="PreProc">return</span> xcurr, ycurr
<span id="L290" class="LineNr">290 </span><span class="Delimiter">}</span>
<span id="L291" class="LineNr">291 </span>
<span id="L292" class="LineNr">292 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L292'>draw-text-wrapping-down-then-right-over-full-screen</a></span> screen: (addr screen), text: (addr array byte), x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L293" class="LineNr">293 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L294" class="LineNr">294 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L295" class="LineNr">295 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L243'>draw-text-wrapping-down-then-right</a> screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, x, y, color <span class="muComment"># 1024, 768</span>
<span id="L296" class="LineNr">296 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L297" class="LineNr">297 </span><span class="Delimiter">}</span>
<span id="L298" class="LineNr">298 </span>
<span id="L299" class="LineNr">299 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L299'>draw-text-wrapping-down-then-right-from-cursor</a></span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L300" class="LineNr">300 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L301" class="LineNr">301 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L302" class="LineNr">302 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L303" class="LineNr">303 </span> <span class="PreProc">var</span> end-y/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy cursor-y
<span id="L304" class="LineNr">304 </span> end-y <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L305" class="LineNr">305 </span> compare end-y, ymax
<span id="L306" class="LineNr">306 </span> <span class="Delimiter">{</span>
<span id="L307" class="LineNr">307 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L308" class="LineNr">308 </span> cursor-x <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L309" class="LineNr">309 </span> cursor-y <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L310" class="LineNr">310 </span> <span class="Delimiter">}</span>
<span id="L311" class="LineNr">311 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L243'>draw-text-wrapping-down-then-right</a> screen, text, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color
<span id="L312" class="LineNr">312 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L313" class="LineNr">313 </span><span class="Delimiter">}</span>
<span id="L314" class="LineNr">314 </span>
<span id="L315" class="LineNr">315 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L315'>draw-text-wrapping-down-then-right-from-cursor-over-full-screen</a></span> screen: (addr screen), text: (addr array byte), color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L316" class="LineNr">316 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L317" class="LineNr">317 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L318" class="LineNr">318 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L299'>draw-text-wrapping-down-then-right-from-cursor</a> screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, color <span class="muComment"># 1024, 768</span>
<span id="L319" class="LineNr">319 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L320" class="LineNr">320 </span><span class="Delimiter">}</span>
<span id="L265" class="LineNr">265 </span> <span class="muComment"># we do; actually draw</span>
<span id="L266" class="LineNr">266 </span> <a href='106stream.subx.html#L56'>rewind-stream</a> stream
<span id="L267" class="LineNr">267 </span> xcurr <span class="SpecialChar">&lt;-</span> copy x
<span id="L268" class="LineNr">268 </span> ycurr <span class="SpecialChar">&lt;-</span> copy y
<span id="L269" class="LineNr">269 </span> <span class="Delimiter">{</span>
<span id="L270" class="LineNr">270 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L271" class="LineNr">271 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L272" class="LineNr">272 </span> <span class="PreProc">break-if-=</span>
<span id="L273" class="LineNr">273 </span> <a href='103grapheme.subx.html#L5'>draw-grapheme</a> screen, g, xcurr, ycurr, color
<span id="L274" class="LineNr">274 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L275" class="LineNr">275 </span> compare ycurr, ymax
<span id="L276" class="LineNr">276 </span> <span class="Delimiter">{</span>
<span id="L277" class="LineNr">277 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L278" class="LineNr">278 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L279" class="LineNr">279 </span> ycurr <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L280" class="LineNr">280 </span> <span class="Delimiter">}</span>
<span id="L281" class="LineNr">281 </span> <span class="PreProc">loop</span>
<span id="L282" class="LineNr">282 </span> <span class="Delimiter">}</span>
<span id="L283" class="LineNr">283 </span> <a href='103grapheme.subx.html#L90'>set-cursor-position</a> screen, xcurr, ycurr
<span id="L284" class="LineNr">284 </span> <span class="PreProc">return</span> xcurr, ycurr
<span id="L285" class="LineNr">285 </span><span class="Delimiter">}</span>
<span id="L286" class="LineNr">286 </span>
<span id="L287" class="LineNr">287 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L287'>draw-text-wrapping-down-then-right-over-full-screen</a></span> screen: (addr screen), text: (addr array byte), x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L288" class="LineNr">288 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L289" class="LineNr">289 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L290" class="LineNr">290 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L238'>draw-text-wrapping-down-then-right</a> screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, x, y, color <span class="muComment"># 1024, 768</span>
<span id="L291" class="LineNr">291 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L292" class="LineNr">292 </span><span class="Delimiter">}</span>
<span id="L293" class="LineNr">293 </span>
<span id="L294" class="LineNr">294 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L294'>draw-text-wrapping-down-then-right-from-cursor</a></span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int <span class="Delimiter">{</span>
<span id="L295" class="LineNr">295 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L296" class="LineNr">296 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L297" class="LineNr">297 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L77'>cursor-position</a> screen
<span id="L298" class="LineNr">298 </span> <span class="PreProc">var</span> end-y/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy cursor-y
<span id="L299" class="LineNr">299 </span> end-y <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L300" class="LineNr">300 </span> compare end-y, ymax
<span id="L301" class="LineNr">301 </span> <span class="Delimiter">{</span>
<span id="L302" class="LineNr">302 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L303" class="LineNr">303 </span> cursor-x <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L304" class="LineNr">304 </span> cursor-y <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L305" class="LineNr">305 </span> <span class="Delimiter">}</span>
<span id="L306" class="LineNr">306 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L238'>draw-text-wrapping-down-then-right</a> screen, text, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color
<span id="L307" class="LineNr">307 </span><span class="Delimiter">}</span>
<span id="L308" class="LineNr">308 </span>
<span id="L309" class="LineNr">309 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L309'>draw-text-wrapping-down-then-right-from-cursor-over-full-screen</a></span> screen: (addr screen), text: (addr array byte), color: int <span class="Delimiter">{</span>
<span id="L310" class="LineNr">310 </span> <a href='501draw-text.mu.html#L294'>draw-text-wrapping-down-then-right-from-cursor</a> screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, color <span class="muComment"># 1024, 768</span>
<span id="L311" class="LineNr">311 </span><span class="Delimiter">}</span>
</pre>
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<a href='https://github.com/akkartik/mu/blob/main/baremetal/502test.mu'>https://github.com/akkartik/mu/blob/main/baremetal/502test.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># print msg to screen if a != b, otherwise print &quot;.&quot;</span>
<span id="L2" class="LineNr"> 2 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='502test.mu.html#L2'>check-ints-equal</a></span> _a: int, b: int, msg: (addr array byte) <span class="Delimiter">{</span>
<span id="L3" class="LineNr"> 3 </span> <span class="PreProc">var</span> a/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy _a
<span id="L4" class="LineNr"> 4 </span> compare a, b
<span id="L5" class="LineNr"> 5 </span> <span class="Delimiter">{</span>
<span id="L6" class="LineNr"> 6 </span> <span class="PreProc">break-if-=</span>
<span id="L7" class="LineNr"> 7 </span> <a href='501draw-text.mu.html#L183'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> <span class="Constant">0</span>, msg, <span class="Constant">3</span> <span class="muComment"># 3=cyan</span>
<span id="L8" class="LineNr"> 8 </span> <a href='104test.subx.html#L5'>count-test-failure</a>
<span id="L9" class="LineNr"> 9 </span> <span class="PreProc">return</span>
<span id="L10" class="LineNr">10 </span> <span class="Delimiter">}</span>
<span id="L11" class="LineNr">11 </span> <span class="Delimiter">{</span>
<span id="L12" class="LineNr">12 </span> <span class="PreProc">break-if-!=</span>
<span id="L13" class="LineNr">13 </span> <a href='501draw-text.mu.html#L183'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;.&quot;</span>, <span class="Constant">3</span> <span class="muComment"># 3=cyan</span>
<span id="L14" class="LineNr">14 </span> <span class="Delimiter">}</span>
<span id="L15" class="LineNr">15 </span><span class="Delimiter">}</span>
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </span><span class="PreProc">fn</span> <span class="muTest"><a href='502test.mu.html#L17'>test-check-ints-equal</a></span> <span class="Delimiter">{</span>
<span id="L18" class="LineNr">18 </span> <a href='502test.mu.html#L2'>check-ints-equal</a> <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">&quot;abc&quot;</span>
<span id="L19" class="LineNr">19 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->

4
html/baremetal/503manhattan-line.mu.html generated
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@ -67,7 +67,7 @@ if ('onhashchange' in window) {
<span id="L10" class="LineNr">10 </span> <span class="Delimiter">{</span>
<span id="L11" class="LineNr">11 </span> compare x, x2
<span id="L12" class="LineNr">12 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L13" class="LineNr">13 </span> <a href='101screen.subx.html#L3'>pixel</a> screen, x, y, color
<span id="L13" class="LineNr">13 </span> <a href='101screen.subx.html#L5'>pixel</a> screen, x, y, color
<span id="L14" class="LineNr">14 </span> x <span class="SpecialChar">&lt;-</span> increment
<span id="L15" class="LineNr">15 </span> <span class="PreProc">loop</span>
<span id="L16" class="LineNr">16 </span> <span class="Delimiter">}</span>
@ -78,7 +78,7 @@ if ('onhashchange' in window) {
<span id="L21" class="LineNr">21 </span> <span class="Delimiter">{</span>
<span id="L22" class="LineNr">22 </span> compare y, y2
<span id="L23" class="LineNr">23 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L24" class="LineNr">24 </span> <a href='101screen.subx.html#L3'>pixel</a> screen, x, y, color
<span id="L24" class="LineNr">24 </span> <a href='101screen.subx.html#L5'>pixel</a> screen, x, y, color
<span id="L25" class="LineNr">25 </span> y <span class="SpecialChar">&lt;-</span> increment
<span id="L26" class="LineNr">26 </span> <span class="PreProc">loop</span>
<span id="L27" class="LineNr">27 </span> <span class="Delimiter">}</span>

10
html/baremetal/ex1.subx.html generated
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@ -64,10 +64,12 @@ if ('onhashchange' in window) {
<span id="L10" class="LineNr">10 </span><span class="subxComment"># Or:</span>
<span id="L11" class="LineNr">11 </span><span class="subxComment"># bochs -f baremetal/boot.bochsrc # boot.bochsrc loads disk.img</span>
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span><span class="subxFunction">main</span>:
<span id="L14" class="LineNr">14 </span> e9/jump <a href='ex1.subx.html#L13'>main</a>/disp32
<span id="L15" class="LineNr">15 </span>
<span id="L16" class="LineNr">16 </span><span class="subxComment"># vim&#0058;ft=subx</span>
<span id="L13" class="LineNr">13 </span>== code
<span id="L14" class="LineNr">14 </span>
<span id="L15" class="LineNr">15 </span><span class="subxFunction">main</span>:
<span id="L16" class="LineNr">16 </span> e9/jump <a href='ex1.subx.html#L15'>main</a>/disp32
<span id="L17" class="LineNr">17 </span>
<span id="L18" class="LineNr">18 </span><span class="subxComment"># vim&#0058;ft=subx</span>
</pre>
</body>
</html>

2
html/baremetal/ex2.mu.html generated
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@ -79,7 +79,7 @@ if ('onhashchange' in window) {
<span id="L21" class="LineNr">21 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L22" class="LineNr">22 </span> <span class="PreProc">var</span> color/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy x
<span id="L23" class="LineNr">23 </span> color <span class="SpecialChar">&lt;-</span> and <span class="Constant">0xff</span>
<span id="L24" class="LineNr">24 </span> <a href='101screen.subx.html#L3'>pixel</a> <span class="Constant">0</span>, x, y, color
<span id="L24" class="LineNr">24 </span> <a href='101screen.subx.html#L5'>pixel</a> <span class="Constant">0</span>, x, y, color
<span id="L25" class="LineNr">25 </span> x <span class="SpecialChar">&lt;-</span> increment
<span id="L26" class="LineNr">26 </span> <span class="PreProc">loop</span>
<span id="L27" class="LineNr">27 </span> <span class="Delimiter">}</span>

44
html/baremetal/ex2.subx.html generated
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@ -65,27 +65,29 @@ if ('onhashchange' in window) {
<span id="L10" class="LineNr">10 </span><span class="subxComment"># Expected output:</span>
<span id="L11" class="LineNr">11 </span><span class="subxComment"># html/baremetal.png</span>
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span><span class="subxFunction">main</span>:
<span id="L14" class="LineNr">14 </span> <span class="subxComment"># ecx &lt;- start of video memory</span>
<span id="L15" class="LineNr">15 </span> 8b/-&gt; *0x7f28 1/r32/ecx
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </span> <span class="subxComment"># eax &lt;- final pixel of video memory</span>
<span id="L18" class="LineNr">18 </span> 8d/copy-address *(ecx + 0x0bffff) 0/r32/eax <span class="subxComment"># 0xbffff = 1024*768 - 1</span>
<span id="L19" class="LineNr">19 </span>
<span id="L20" class="LineNr">20 </span> <span class="subxComment"># for each pixel in video memory</span>
<span id="L21" class="LineNr">21 </span> {
<span id="L22" class="LineNr">22 </span> 39/compare %eax 1/r32/ecx
<span id="L23" class="LineNr">23 </span> 7c/jump-if-&lt; <span class="Constant">break</span>/disp8
<span id="L24" class="LineNr">24 </span> <span class="subxComment"># write its column number to it</span>
<span id="L25" class="LineNr">25 </span> 88/byte&lt;- *eax 0/r32/AL
<span id="L26" class="LineNr">26 </span> 48/decrement-eax
<span id="L27" class="LineNr">27 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L28" class="LineNr">28 </span> }
<span id="L29" class="LineNr">29 </span>
<span id="L30" class="LineNr">30 </span> <span class="subxComment"># hang indefinitely</span>
<span id="L31" class="LineNr">31 </span> {
<span id="L32" class="LineNr">32 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L33" class="LineNr">33 </span> }
<span id="L13" class="LineNr">13 </span>== code
<span id="L14" class="LineNr">14 </span>
<span id="L15" class="LineNr">15 </span><span class="subxFunction">main</span>:
<span id="L16" class="LineNr">16 </span> <span class="subxComment"># ecx &lt;- start of video memory</span>
<span id="L17" class="LineNr">17 </span> 8b/-&gt; *0x7f28 1/r32/ecx
<span id="L18" class="LineNr">18 </span>
<span id="L19" class="LineNr">19 </span> <span class="subxComment"># eax &lt;- final pixel of video memory</span>
<span id="L20" class="LineNr">20 </span> 8d/copy-address *(ecx + 0x0bffff) 0/r32/eax <span class="subxComment"># 0xbffff = 1024*768 - 1</span>
<span id="L21" class="LineNr">21 </span>
<span id="L22" class="LineNr">22 </span> <span class="subxComment"># for each pixel in video memory</span>
<span id="L23" class="LineNr">23 </span> {
<span id="L24" class="LineNr">24 </span> 39/compare %eax 1/r32/ecx
<span id="L25" class="LineNr">25 </span> 7c/jump-if-&lt; <span class="Constant">break</span>/disp8
<span id="L26" class="LineNr">26 </span> <span class="subxComment"># write its column number to it</span>
<span id="L27" class="LineNr">27 </span> 88/byte&lt;- *eax 0/r32/AL
<span id="L28" class="LineNr">28 </span> 48/decrement-eax
<span id="L29" class="LineNr">29 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L30" class="LineNr">30 </span> }
<span id="L31" class="LineNr">31 </span>
<span id="L32" class="LineNr">32 </span> <span class="subxComment"># hang indefinitely</span>
<span id="L33" class="LineNr">33 </span> {
<span id="L34" class="LineNr">34 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L35" class="LineNr">35 </span> }
</pre>
</body>
</html>

4
html/baremetal/ex3.mu.html generated
View File

@ -73,10 +73,10 @@ if ('onhashchange' in window) {
<span id="L15" class="LineNr">15 </span> <span class="PreProc">var</span> x/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L16" class="LineNr">16 </span> <span class="PreProc">var</span> y/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L17" class="LineNr">17 </span> <span class="Delimiter">{</span>
<span id="L18" class="LineNr">18 </span> <span class="PreProc">var</span> key/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='102keyboard.subx.html#L3'>read-key</a> <span class="Constant">0</span> <span class="muComment"># real keyboard</span>
<span id="L18" class="LineNr">18 </span> <span class="PreProc">var</span> key/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='102keyboard.subx.html#L6'>read-key</a> <span class="Constant">0</span> <span class="muComment"># real keyboard</span>
<span id="L19" class="LineNr">19 </span> compare key, <span class="Constant">0</span>
<span id="L20" class="LineNr">20 </span> <span class="PreProc">loop-if-=</span> <span class="muComment"># busy wait</span>
<span id="L21" class="LineNr">21 </span> <a href='101screen.subx.html#L3'>pixel</a> <span class="Constant">0</span>, x, y, <span class="Constant">0x31</span> <span class="muComment"># green</span>
<span id="L21" class="LineNr">21 </span> <a href='101screen.subx.html#L5'>pixel</a> <span class="Constant">0</span>, x, y, <span class="Constant">0x31</span> <span class="muComment"># green</span>
<span id="L22" class="LineNr">22 </span> x <span class="SpecialChar">&lt;-</span> increment
<span id="L23" class="LineNr">23 </span> compare x, <span class="Constant">0x400</span>
<span id="L24" class="LineNr">24 </span> <span class="Delimiter">{</span>

2
html/baremetal/ex4.mu.html generated
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@ -69,7 +69,7 @@ if ('onhashchange' in window) {
<span id="L11" class="LineNr">11 </span>
<span id="L12" class="LineNr">12 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='ex4.mu.html#L12'>main</a></span> <span class="Delimiter">{</span>
<span id="L13" class="LineNr">13 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0x41</span> <span class="muComment"># 'A'</span>
<span id="L14" class="LineNr">14 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> <span class="Constant">0</span>, g, <span class="Constant">0x10</span>, <span class="Constant">0x10</span>, <span class="Constant">0xa</span>
<span id="L14" class="LineNr">14 </span> <a href='103grapheme.subx.html#L5'>draw-grapheme</a> <span class="Constant">0</span>, g, <span class="Constant">0x10</span>, <span class="Constant">0x10</span>, <span class="Constant">0xa</span>
<span id="L15" class="LineNr">15 </span><span class="Delimiter">}</span>
</pre>
</body>

10
html/baremetal/ex6.mu.html generated
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@ -78,15 +78,15 @@ if ('onhashchange' in window) {
<span id="L20" class="LineNr">20 </span> x, y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L112'>draw-text-wrapping-right-then-down</a> <span class="Constant">0</span>, <span class="Constant">&quot;Mu!&quot;</span>, <span class="Constant">0x10</span>, <span class="Constant">0x20</span>, <span class="Constant">0x78</span>, <span class="Constant">0x50</span>, x, y, <span class="Constant">0xa</span>
<span id="L21" class="LineNr">21 </span>
<span id="L22" class="LineNr">22 </span> <span class="muComment"># drawing at the cursor in multiple directions</span>
<span id="L23" class="LineNr">23 </span> x, y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L315'>draw-text-wrapping-down-then-right-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;abc&quot;</span>, <span class="Constant">0xa</span>
<span id="L24" class="LineNr">24 </span> x, y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L184'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;def&quot;</span>, <span class="Constant">0xa</span>
<span id="L23" class="LineNr">23 </span> <a href='501draw-text.mu.html#L309'>draw-text-wrapping-down-then-right-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;abc&quot;</span>, <span class="Constant">0xa</span>
<span id="L24" class="LineNr">24 </span> <a href='501draw-text.mu.html#L183'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;def&quot;</span>, <span class="Constant">0xa</span>
<span id="L25" class="LineNr">25 </span>
<span id="L26" class="LineNr">26 </span> <span class="muComment"># test drawing near the edge</span>
<span id="L27" class="LineNr">27 </span> x <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L65'>draw-text-rightward</a> <span class="Constant">0</span>, <span class="Constant">&quot;R&quot;</span>, <span class="Constant">0x3f8</span>, <span class="Constant">0x400</span>, <span class="Constant">0x100</span>, <span class="Constant">0xa</span>
<span id="L28" class="LineNr">28 </span> x, y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L184'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;wrapped from R&quot;</span>, <span class="Constant">0xa</span>
<span id="L28" class="LineNr">28 </span> <a href='501draw-text.mu.html#L183'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;wrapped from R&quot;</span>, <span class="Constant">0xa</span>
<span id="L29" class="LineNr">29 </span>
<span id="L30" class="LineNr">30 </span> x <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L196'>draw-text-downward</a> <span class="Constant">0</span>, <span class="Constant">&quot;D&quot;</span>, <span class="Constant">0x100</span>, <span class="Constant">0x2f0</span>, <span class="Constant">0x300</span>, <span class="Constant">0xa</span>
<span id="L31" class="LineNr">31 </span> x, y <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L315'>draw-text-wrapping-down-then-right-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;wrapped from D&quot;</span>, <span class="Constant">0xa</span>
<span id="L30" class="LineNr">30 </span> x <span class="SpecialChar">&lt;-</span> <a href='501draw-text.mu.html#L192'>draw-text-downward</a> <span class="Constant">0</span>, <span class="Constant">&quot;D&quot;</span>, <span class="Constant">0x100</span>, <span class="Constant">0x2f0</span>, <span class="Constant">0x300</span>, <span class="Constant">0xa</span>
<span id="L31" class="LineNr">31 </span> <a href='501draw-text.mu.html#L309'>draw-text-wrapping-down-then-right-from-cursor-over-full-screen</a> <span class="Constant">0</span>, <span class="Constant">&quot;wrapped from D&quot;</span>, <span class="Constant">0xa</span>
<span id="L32" class="LineNr">32 </span><span class="Delimiter">}</span>
</pre>
</body>

2
html/baremetal/ex7.mu.html generated
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@ -69,7 +69,7 @@ if ('onhashchange' in window) {
<span id="L11" class="LineNr">11 </span><span class="muComment"># k, l.</span>
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='ex7.mu.html#L13'>main</a></span> <span class="Delimiter">{</span>
<span id="L14" class="LineNr">14 </span> <span class="PreProc">var</span> key/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='102keyboard.subx.html#L3'>read-key</a> <span class="Constant">0</span>
<span id="L14" class="LineNr">14 </span> <span class="PreProc">var</span> key/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='102keyboard.subx.html#L6'>read-key</a> <span class="Constant">0</span>
<span id="L15" class="LineNr">15 </span> <span class="Delimiter">{</span>
<span id="L16" class="LineNr">16 </span> compare key, <span class="Constant">0x68</span> <span class="muComment"># 'h'</span>
<span id="L17" class="LineNr">17 </span> <span class="PreProc">break-if-!=</span>

22
html/baremetal/mu-init.subx.html generated
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@ -63,12 +63,22 @@ if ('onhashchange' in window) {
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># initialize stack</span>
<span id="L10" class="LineNr">10 </span>bd/copy-to-ebp 0/imm32
<span id="L11" class="LineNr">11 </span><span class="subxComment"># no heap yet</span>
<span id="L12" class="LineNr">12 </span>(main)
<span id="L13" class="LineNr">13 </span>
<span id="L14" class="LineNr">14 </span><span class="subxComment"># hang indefinitely</span>
<span id="L15" class="LineNr">15 </span>{
<span id="L16" class="LineNr">16 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L17" class="LineNr">17 </span>}
<span id="L12" class="LineNr">12 </span><span class="subxComment">#</span>
<span id="L13" class="LineNr">13 </span><span class="subxComment"># always first run tests</span>
<span id="L14" class="LineNr">14 </span>(run-tests)
<span id="L15" class="LineNr">15 </span>(<a href='104test.subx.html#L17'>num-test-failures</a>) <span class="subxComment"># =&gt; eax</span>
<span id="L16" class="LineNr">16 </span><span class="subxComment"># call main if tests all passed</span>
<span id="L17" class="LineNr">17 </span>{
<span id="L18" class="LineNr">18 </span> 3d/compare-eax-and 0/imm32
<span id="L19" class="LineNr">19 </span> 75/jump-if-!= <span class="Constant">break</span>/disp8
<span id="L20" class="LineNr">20 </span> (<a href='500clear-screen.mu.html#L1'>clear-screen</a>)
<span id="L21" class="LineNr">21 </span> (main)
<span id="L22" class="LineNr">22 </span>}
<span id="L23" class="LineNr">23 </span>
<span id="L24" class="LineNr">24 </span><span class="subxComment"># hang indefinitely</span>
<span id="L25" class="LineNr">25 </span>{
<span id="L26" class="LineNr">26 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L27" class="LineNr">27 </span>}
</pre>
</body>
</html>