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4840 

New helper: printing a string to a buffered file.
This commit is contained in:
Kartik Agaram 2018-12-04 12:16:17 -08:00
parent 707935d0a8
commit a94b60b5cc
11 changed files with 533 additions and 22 deletions
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@ -147,7 +147,7 @@ if ('onhashchange' in window) {
<span id="L81" class="LineNr"> 81 </span> <span class="subxComment"># read byte from stream</span>
<span id="L82" class="LineNr"> 82 </span> <span class="subxComment"># AL = f-&gt;data[f-&gt;read]</span>
<span id="L83" class="LineNr"> 83 </span> 31/xor 3/mod/direct 0/rm32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0/r32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># clear EAX</span>
<span id="L84" class="LineNr"> 84 </span> 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/ESI 1/index/ECX <span class="CommentedCode"> . </span> 0/r32/AL 0x10/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy *(ESI+ECX+16) to AL</span>
<span id="L84" class="LineNr"> 84 </span> 8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/ESI 1/index/ECX <span class="CommentedCode"> . </span> 0/r32/AL 0x10/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy byte at *(ESI+ECX+16) to AL</span>
<span id="L85" class="LineNr"> 85 </span> <span class="subxComment"># ++f-&gt;read</span>
<span id="L86" class="LineNr"> 86 </span> ff 0/subop/increment 1/mod/*+disp8 6/rm32/ESI <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 8/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># increment *(ESI+8)</span>
<span id="L87" class="LineNr"> 87 </span><span class="Constant">$read-byte:end</span>:
@ -300,19 +300,20 @@ if ('onhashchange' in window) {
<span id="L234" class="LineNr">234 </span>
<span id="L235" class="LineNr">235 </span>== data
<span id="L236" class="LineNr">236 </span>
<span id="L237" class="LineNr">237 </span><span class="subxMinorFunction">_test-buffered-file</span>:
<span id="L238" class="LineNr">238 </span> <span class="subxComment"># file descriptor or (address stream)</span>
<span id="L239" class="LineNr">239 </span> _test-stream/imm32
<span id="L240" class="LineNr">240 </span> <span class="subxComment"># current write index</span>
<span id="L241" class="LineNr">241 </span> 00 00 00 00
<span id="L242" class="LineNr">242 </span> <span class="subxComment"># current read index</span>
<span id="L243" class="LineNr">243 </span> 00 00 00 00
<span id="L244" class="LineNr">244 </span> <span class="subxComment"># length (8)</span>
<span id="L245" class="LineNr">245 </span> 08 00 00 00
<span id="L246" class="LineNr">246 </span> <span class="subxComment"># data</span>
<span id="L247" class="LineNr">247 </span> 00 00 00 00 00 00 00 00 <span class="subxComment"># 8 bytes</span>
<span id="L248" class="LineNr">248 </span>
<span id="L249" class="LineNr">249 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
<span id="L237" class="LineNr">237 </span><span class="subxComment"># a test buffered file for _test-stream</span>
<span id="L238" class="LineNr">238 </span><span class="subxMinorFunction">_test-buffered-file</span>:
<span id="L239" class="LineNr">239 </span> <span class="subxComment"># file descriptor or (address stream)</span>
<span id="L240" class="LineNr">240 </span> _test-stream/imm32
<span id="L241" class="LineNr">241 </span> <span class="subxComment"># current write index</span>
<span id="L242" class="LineNr">242 </span> 00 00 00 00
<span id="L243" class="LineNr">243 </span> <span class="subxComment"># current read index</span>
<span id="L244" class="LineNr">244 </span> 00 00 00 00
<span id="L245" class="LineNr">245 </span> <span class="subxComment"># length (6)</span>
<span id="L246" class="LineNr">246 </span> 06 00 00 00
<span id="L247" class="LineNr">247 </span> <span class="subxComment"># data</span>
<span id="L248" class="LineNr">248 </span> 00 00 00 00 00 00 <span class="subxComment"># 6 bytes</span>
<span id="L249" class="LineNr">249 </span>
<span id="L250" class="LineNr">250 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
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<a href='https://github.com/akkartik/mu/blob/master/subx/064write-buffered.subx'>https://github.com/akkartik/mu/blob/master/subx/064write-buffered.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># write-buffered: like 'write', but for a buffered-file</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span>== code
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L6" class="LineNr"> 6 </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="L7" class="LineNr"> 7 </span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># main:</span>
<span id="L9" class="LineNr"> 9 </span><span class="CommentedCode">#? e8/call test-write-buffered/disp32</span>
<span id="L10" class="LineNr"> 10 </span><span class="CommentedCode">#? e8/call test-write-buffered-with-intermediate-flush/disp32</span>
<span id="L11" class="LineNr"> 11 </span> e8/call run-tests/disp32 <span class="subxComment"># 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.</span>
<span id="L12" class="LineNr"> 12 </span> <span class="subxComment"># syscall(exit, Num-test-failures)</span>
<span id="L13" class="LineNr"> 13 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX <span class="SpecialChar">Num-test-failures</span>/disp32 <span class="subxComment"># copy *Num-test-failures to EBX</span>
<span id="L14" class="LineNr"> 14 </span> b8/copy-to-EAX 1/imm32
<span id="L15" class="LineNr"> 15 </span> cd/syscall 0x80/imm8
<span id="L16" class="LineNr"> 16 </span>
<span id="L17" class="LineNr"> 17 </span><span class="subxFunction">write-buffered</span>: <span class="subxComment"># f : (address buffered-file), msg : (address array byte) -&gt; &lt;void&gt;</span>
<span id="L18" class="LineNr"> 18 </span> <span class="subxComment"># pseudocode:</span>
<span id="L19" class="LineNr"> 19 </span> <span class="subxComment"># in = msg-&gt;data</span>
<span id="L20" class="LineNr"> 20 </span> <span class="subxComment"># inend = &amp;msg-&gt;data[msg-&gt;length]</span>
<span id="L21" class="LineNr"> 21 </span> <span class="subxComment"># while in &lt; inend</span>
<span id="L22" class="LineNr"> 22 </span> <span class="subxComment"># if f-&gt;write &gt;= f-&gt;length</span>
<span id="L23" class="LineNr"> 23 </span> <span class="subxComment"># flush(f)</span>
<span id="L24" class="LineNr"> 24 </span> <span class="subxComment"># clear-stream(f)</span>
<span id="L25" class="LineNr"> 25 </span> <span class="subxComment"># f-&gt;data[f-&gt;write] = *in</span>
<span id="L26" class="LineNr"> 26 </span> <span class="subxComment"># ++f-&gt;write</span>
<span id="L27" class="LineNr"> 27 </span> <span class="subxComment"># ++in</span>
<span id="L28" class="LineNr"> 28 </span> <span class="subxComment">#</span>
<span id="L29" class="LineNr"> 29 </span> <span class="subxComment"># registers:</span>
<span id="L30" class="LineNr"> 30 </span> <span class="subxComment"># ESI : in</span>
<span id="L31" class="LineNr"> 31 </span> <span class="subxComment"># ECX : inend</span>
<span id="L32" class="LineNr"> 32 </span> <span class="subxComment"># EDI : f</span>
<span id="L33" class="LineNr"> 33 </span> <span class="subxComment"># EDX : f-&gt;length</span>
<span id="L34" class="LineNr"> 34 </span> <span class="subxComment"># EBX : f-&gt;write (cached copy, need to keep in sync)</span>
<span id="L35" class="LineNr"> 35 </span> <span class="subxComment"># EAX : temp</span>
<span id="L36" class="LineNr"> 36 </span> <span class="subxComment">#</span>
<span id="L37" class="LineNr"> 37 </span> <span class="subxS1Comment"># . prolog</span>
<span id="L38" class="LineNr"> 38 </span> 55/push-EBP
<span id="L39" class="LineNr"> 39 </span> 89/copy 3/mod/direct 5/rm32/EBP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/r32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy ESP to EBP</span>
<span id="L40" class="LineNr"> 40 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L41" class="LineNr"> 41 </span> 50/push-EAX
<span id="L42" class="LineNr"> 42 </span> 51/push-ECX
<span id="L43" class="LineNr"> 43 </span> 52/push-EDX
<span id="L44" class="LineNr"> 44 </span> 53/push-EBX
<span id="L45" class="LineNr"> 45 </span> 56/push-ESI
<span id="L46" class="LineNr"> 46 </span> 57/push-EDI
<span id="L47" class="LineNr"> 47 </span> <span class="subxComment"># EAX = msg</span>
<span id="L48" class="LineNr"> 48 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 0/r32/EAX 0xc/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy *(EBP+12) to EAX</span>
<span id="L49" class="LineNr"> 49 </span> <span class="subxComment"># in/ESI = msg-&gt;data</span>
<span id="L50" class="LineNr"> 50 </span> 8d/copy-address 1/mod/*+disp8 0/rm32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 6/r32/ESI 4/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy EAX+4 to ESI</span>
<span id="L51" class="LineNr"> 51 </span> <span class="subxComment"># inend/ECX = &amp;msg-&gt;data[msg-&gt;length]</span>
<span id="L52" class="LineNr"> 52 </span> 8b/copy 0/mod/indirect 0/rm32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 1/r32/ECX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy *EAX to ECX</span>
<span id="L53" class="LineNr"> 53 </span> 8d/copy-address 0/mod/indirect 4/rm32/sib 6/base/ESI 1/index/ECX <span class="CommentedCode"> . </span> 1/r32/ECX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy ESI+ECX to ECX</span>
<span id="L54" class="LineNr"> 54 </span> <span class="subxComment"># EDI = f</span>
<span id="L55" class="LineNr"> 55 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 7/r32/EDI 8/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy *(EBP+8) to EDI</span>
<span id="L56" class="LineNr"> 56 </span> <span class="subxComment"># EDX = f-&gt;length</span>
<span id="L57" class="LineNr"> 57 </span> 8b/copy 1/mod/*+disp8 7/rm32/EDI <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 2/r32/EDX 0xc/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy *(EDI+12) to EDX</span>
<span id="L58" class="LineNr"> 58 </span> <span class="subxComment"># EBX = f-&gt;write</span>
<span id="L59" class="LineNr"> 59 </span> 8b/copy 1/mod/*+disp8 7/rm32/EDI <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX 4/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy *(EDI+4) to EBX</span>
<span id="L60" class="LineNr"> 60 </span><span class="Constant">$write-buffered:loop</span>:
<span id="L61" class="LineNr"> 61 </span> <span class="subxComment"># if (in &gt;= inend) break</span>
<span id="L62" class="LineNr"> 62 </span> 39/compare 3/mod/direct 6/rm32/ESI <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 1/r32/ECX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># compare ESI with ECX</span>
<span id="L63" class="LineNr"> 63 </span> 7d/jump-if-greater-or-equal $write-buffered:loop-end/disp8
<span id="L64" class="LineNr"> 64 </span> <span class="subxComment"># if (f-&gt;write &gt;= f-&gt;length) flush and clear f's stream</span>
<span id="L65" class="LineNr"> 65 </span> 39/compare 3/mod/direct 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 2/r32/EDX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># compare EBX with EDX</span>
<span id="L66" class="LineNr"> 66 </span> 7c/jump-if-lesser $write-buffered:to-stream/disp8
<span id="L67" class="LineNr"> 67 </span> <span class="subxS1Comment"># . persist f-&gt;write</span>
<span id="L68" class="LineNr"> 68 </span> 89/copy 1/mod/*+disp8 7/rm32/EDI <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX 4/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy EBX to *(EDI+4)</span>
<span id="L69" class="LineNr"> 69 </span> <span class="subxS1Comment"># . flush(f)</span>
<span id="L70" class="LineNr"> 70 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L71" class="LineNr"> 71 </span> 57/push-EDI
<span id="L72" class="LineNr"> 72 </span> <span class="subxS2Comment"># . . call</span>
<span id="L73" class="LineNr"> 73 </span> e8/call flush/disp32
<span id="L74" class="LineNr"> 74 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L75" class="LineNr"> 75 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/imm32 <span class="subxComment"># add to ESP</span>
<span id="L76" class="LineNr"> 76 </span> <span class="subxS1Comment"># . clear-stream(stream = f+4)</span>
<span id="L77" class="LineNr"> 77 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L78" class="LineNr"> 78 </span> 8d/copy-address 1/mod/*+disp8 7/rm32/EDI <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0/r32/EAX 4/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy EDI+4 to EAX</span>
<span id="L79" class="LineNr"> 79 </span> 50/push-EAX
<span id="L80" class="LineNr"> 80 </span> <span class="subxS2Comment"># . . call</span>
<span id="L81" class="LineNr"> 81 </span> e8/call clear-stream/disp32
<span id="L82" class="LineNr"> 82 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L83" class="LineNr"> 83 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/imm32 <span class="subxComment"># add to ESP</span>
<span id="L84" class="LineNr"> 84 </span> <span class="subxS1Comment"># . clear EBX (cached f-&gt;write)</span>
<span id="L85" class="LineNr"> 85 </span> 31/xor 3/mod/direct 3/rm32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># clear EBX</span>
<span id="L86" class="LineNr"> 86 </span><span class="Constant">$write-buffered:to-stream</span>:
<span id="L87" class="LineNr"> 87 </span> <span class="subxComment"># write to stream</span>
<span id="L88" class="LineNr"> 88 </span> <span class="subxComment"># f-&gt;data[f-&gt;write] = *in</span>
<span id="L89" class="LineNr"> 89 </span> <span class="subxS1Comment"># . AL = *in</span>
<span id="L90" class="LineNr"> 90 </span> 31/xor 3/mod/direct 0/rm32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0/r32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># clear EAX</span>
<span id="L91" class="LineNr"> 91 </span> 8a/copy-byte 0/mod/indirect 6/rm32/ESI <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0/r32/AL <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy byte at *ESI to AL</span>
<span id="L92" class="LineNr"> 92 </span> <span class="subxS1Comment"># . f-&gt;data[f-&gt;write] = AL</span>
<span id="L93" class="LineNr"> 93 </span> 88/copy-byte 1/mod/*+disp8 4/rm32/sib 7/base/EDI 3/index/EBX <span class="CommentedCode"> . </span> 0/r32/AL 0x10/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy AL to *(EDI+EBX+16)</span>
<span id="L94" class="LineNr"> 94 </span> <span class="subxComment"># ++f-&gt;write</span>
<span id="L95" class="LineNr"> 95 </span> 43/increment-EBX
<span id="L96" class="LineNr"> 96 </span> <span class="subxComment"># ++in</span>
<span id="L97" class="LineNr"> 97 </span> 46/increment-ESI
<span id="L98" class="LineNr"> 98 </span> eb/jump $write-buffered:loop/disp8
<span id="L99" class="LineNr"> 99 </span><span class="Constant">$write-buffered:loop-end</span>:
<span id="L100" class="LineNr">100 </span> <span class="subxComment"># persist necessary variables from registers</span>
<span id="L101" class="LineNr">101 </span> 89/copy 1/mod/*+disp8 7/rm32/EDI <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 3/r32/EBX 4/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># copy EBX to *(EDI+4)</span>
<span id="L102" class="LineNr">102 </span><span class="Constant">$write-buffered:end</span>:
<span id="L103" class="LineNr">103 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L104" class="LineNr">104 </span> 5f/pop-to-EDI
<span id="L105" class="LineNr">105 </span> 5e/pop-to-ESI
<span id="L106" class="LineNr">106 </span> 5b/pop-to-EBX
<span id="L107" class="LineNr">107 </span> 5a/pop-to-EDX
<span id="L108" class="LineNr">108 </span> 59/pop-to-ECX
<span id="L109" class="LineNr">109 </span> 58/pop-to-EAX
<span id="L110" class="LineNr">110 </span> <span class="subxS1Comment"># . epilog</span>
<span id="L111" class="LineNr">111 </span> 89/copy 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 5/r32/EBP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># copy EBP to ESP</span>
<span id="L112" class="LineNr">112 </span> 5d/pop-to-EBP
<span id="L113" class="LineNr">113 </span> c3/return
<span id="L114" class="LineNr">114 </span>
<span id="L115" class="LineNr">115 </span><span class="subxTest">test-write-buffered</span>:
<span id="L116" class="LineNr">116 </span> <span class="subxH1Comment"># - check that write-buffered writes to the file</span>
<span id="L117" class="LineNr">117 </span> <span class="subxComment"># setup</span>
<span id="L118" class="LineNr">118 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
<span id="L119" class="LineNr">119 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L120" class="LineNr">120 </span> 68/push _test-stream/imm32
<span id="L121" class="LineNr">121 </span> <span class="subxS2Comment"># . . call</span>
<span id="L122" class="LineNr">122 </span> e8/call clear-stream/disp32
<span id="L123" class="LineNr">123 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L124" class="LineNr">124 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/imm32 <span class="subxComment"># add to ESP</span>
<span id="L125" class="LineNr">125 </span> <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
<span id="L126" class="LineNr">126 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L127" class="LineNr">127 </span> b8/copy-to-EAX _test-buffered-file/imm32
<span id="L128" class="LineNr">128 </span> 05/add-to-EAX 4/imm32
<span id="L129" class="LineNr">129 </span> 50/push-EAX
<span id="L130" class="LineNr">130 </span> <span class="subxS2Comment"># . . call</span>
<span id="L131" class="LineNr">131 </span> e8/call clear-stream/disp32
<span id="L132" class="LineNr">132 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L133" class="LineNr">133 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/imm32 <span class="subxComment"># add to ESP</span>
<span id="L134" class="LineNr">134 </span> <span class="subxComment"># write-buffered(_test-buffered-file, &quot;Abc&quot;)</span>
<span id="L135" class="LineNr">135 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L136" class="LineNr">136 </span> 68/push <span class="Constant">&quot;Abc&quot;</span>/imm32
<span id="L137" class="LineNr">137 </span> 68/push _test-buffered-file/imm32
<span id="L138" class="LineNr">138 </span> <span class="subxS2Comment"># . . call</span>
<span id="L139" class="LineNr">139 </span> e8/call write-buffered/disp32
<span id="L140" class="LineNr">140 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L141" class="LineNr">141 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 8/imm32 <span class="subxComment"># add to ESP</span>
<span id="L142" class="LineNr">142 </span> <span class="subxComment"># flush(_test-buffered-file)</span>
<span id="L143" class="LineNr">143 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L144" class="LineNr">144 </span> 68/push _test-buffered-file/imm32
<span id="L145" class="LineNr">145 </span> <span class="subxS2Comment"># . . call</span>
<span id="L146" class="LineNr">146 </span> e8/call flush/disp32
<span id="L147" class="LineNr">147 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L148" class="LineNr">148 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/imm32 <span class="subxComment"># add to ESP</span>
<span id="L149" class="LineNr">149 </span> <span class="subxComment"># check-ints-equal(*_test-stream-&gt;data, &quot;Abc&quot;, msg)</span>
<span id="L150" class="LineNr">150 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L151" class="LineNr">151 </span> 68/push <span class="Constant">&quot;F - test-write-buffered-single&quot;</span>/imm32
<span id="L152" class="LineNr">152 </span> 68/push 0x636241/imm32
<span id="L153" class="LineNr">153 </span> <span class="subxS2Comment"># . . push *_test-stream-&gt;data</span>
<span id="L154" class="LineNr">154 </span> b8/copy-to-EAX _test-stream/imm32
<span id="L155" class="LineNr">155 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0xc/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># push *(EAX+12)</span>
<span id="L156" class="LineNr">156 </span> <span class="subxS2Comment"># . . call</span>
<span id="L157" class="LineNr">157 </span> e8/call check-ints-equal/disp32
<span id="L158" class="LineNr">158 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L159" class="LineNr">159 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L160" class="LineNr">160 </span> <span class="subxS1Comment"># . end</span>
<span id="L161" class="LineNr">161 </span> c3/return
<span id="L162" class="LineNr">162 </span>
<span id="L163" class="LineNr">163 </span><span class="subxTest">test-write-buffered-with-intermediate-flush</span>:
<span id="L164" class="LineNr">164 </span> <span class="subxH1Comment"># - check that write-buffered flushes in the middle if its buffer fills up</span>
<span id="L165" class="LineNr">165 </span> <span class="subxComment"># setup</span>
<span id="L166" class="LineNr">166 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
<span id="L167" class="LineNr">167 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L168" class="LineNr">168 </span> 68/push _test-stream/imm32
<span id="L169" class="LineNr">169 </span> <span class="subxS2Comment"># . . call</span>
<span id="L170" class="LineNr">170 </span> e8/call clear-stream/disp32
<span id="L171" class="LineNr">171 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L172" class="LineNr">172 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/imm32 <span class="subxComment"># add to ESP</span>
<span id="L173" class="LineNr">173 </span> <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
<span id="L174" class="LineNr">174 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L175" class="LineNr">175 </span> b8/copy-to-EAX _test-buffered-file/imm32
<span id="L176" class="LineNr">176 </span> 05/add-to-EAX 4/imm32
<span id="L177" class="LineNr">177 </span> 50/push-EAX
<span id="L178" class="LineNr">178 </span> <span class="subxS2Comment"># . . call</span>
<span id="L179" class="LineNr">179 </span> e8/call clear-stream/disp32
<span id="L180" class="LineNr">180 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L181" class="LineNr">181 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/imm32 <span class="subxComment"># add to ESP</span>
<span id="L182" class="LineNr">182 </span> <span class="subxComment"># _test-stream can hold 8 bytes, but _test-buffered-file can hold only 6.</span>
<span id="L183" class="LineNr">183 </span> <span class="subxComment"># Try to write 7 bytes.</span>
<span id="L184" class="LineNr">184 </span> <span class="subxS1Comment"># . write-buffered(_test-buffered-file, &quot;Abcdefg&quot;)</span>
<span id="L185" class="LineNr">185 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L186" class="LineNr">186 </span> 68/push <span class="Constant">&quot;Abcdefg&quot;</span>/imm32
<span id="L187" class="LineNr">187 </span> 68/push _test-buffered-file/imm32
<span id="L188" class="LineNr">188 </span> <span class="subxS2Comment"># . . call</span>
<span id="L189" class="LineNr">189 </span> e8/call write-buffered/disp32
<span id="L190" class="LineNr">190 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L191" class="LineNr">191 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 8/imm32 <span class="subxComment"># add to ESP</span>
<span id="L192" class="LineNr">192 </span> <span class="subxComment"># don't flush</span>
<span id="L193" class="LineNr">193 </span> <span class="subxComment"># 6 bytes should still have gotten to _test-stream</span>
<span id="L194" class="LineNr">194 </span> <span class="subxS1Comment"># . check-ints-equal(*_test-stream-&gt;write, 6, msg)</span>
<span id="L195" class="LineNr">195 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L196" class="LineNr">196 </span> 68/push <span class="Constant">&quot;F - test-write-buffered-with-intermediate-flush: flushed data&quot;</span>/imm32
<span id="L197" class="LineNr">197 </span> 68/push 6/imm32
<span id="L198" class="LineNr">198 </span> <span class="subxS2Comment"># . . push *_test-stream-&gt;write</span>
<span id="L199" class="LineNr">199 </span> b8/copy-to-EAX _test-stream/imm32
<span id="L200" class="LineNr">200 </span> ff 6/subop/push 0/mod/indirect 0/rm32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="subxComment"># push *EAX</span>
<span id="L201" class="LineNr">201 </span> <span class="subxS2Comment"># . . call</span>
<span id="L202" class="LineNr">202 </span> e8/call check-ints-equal/disp32
<span id="L203" class="LineNr">203 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L204" class="LineNr">204 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L205" class="LineNr">205 </span> <span class="subxComment"># and 1 byte should still be in _test-buffered-file</span>
<span id="L206" class="LineNr">206 </span> <span class="subxS1Comment"># . check-ints-equal(*_test-buffered-file&gt;write, 1, msg)</span>
<span id="L207" class="LineNr">207 </span> <span class="subxS2Comment"># . . push args</span>
<span id="L208" class="LineNr">208 </span> 68/push <span class="Constant">&quot;F - test-write-buffered-with-intermediate-flush: unflushed bytes&quot;</span>/imm32
<span id="L209" class="LineNr">209 </span> 68/push 1/imm32
<span id="L210" class="LineNr">210 </span> <span class="subxS2Comment"># . . push *_test-buffered-file-&gt;write</span>
<span id="L211" class="LineNr">211 </span> b8/copy-to-EAX _test-buffered-file/imm32
<span id="L212" class="LineNr">212 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 4/disp8 <span class="CommentedCode"> . </span> <span class="subxComment"># push *(EAX+4)</span>
<span id="L213" class="LineNr">213 </span> <span class="subxS2Comment"># . . call</span>
<span id="L214" class="LineNr">214 </span> e8/call check-ints-equal/disp32
<span id="L215" class="LineNr">215 </span> <span class="subxS2Comment"># . . discard args</span>
<span id="L216" class="LineNr">216 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> <span class="CommentedCode"> . </span> 0xc/imm32 <span class="subxComment"># add to ESP</span>
<span id="L217" class="LineNr">217 </span> <span class="subxS1Comment"># . end</span>
<span id="L218" class="LineNr">218 </span> c3/return
<span id="L219" class="LineNr">219 </span>
<span id="L220" class="LineNr">220 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->

2
html/subx/apps/crenshaw2-1.subx.html
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@ -277,7 +277,7 @@ if ('onhashchange' in window) {
<span id="L211" class="LineNr">211 </span> <span class="subxComment"># ESI : in</span>
<span id="L212" class="LineNr">212 </span> <span class="subxComment"># EDI : out</span>
<span id="L213" class="LineNr">213 </span> <span class="subxComment"># EAX : temp</span>
<span id="L214" class="LineNr">214 </span> <span class="subxComment"># ECX : out-&gt;write</span>
<span id="L214" class="LineNr">214 </span> <span class="subxComment"># ECX : out-&gt;write (persisted back at end)</span>
<span id="L215" class="LineNr">215 </span> <span class="subxComment"># EDX : out-&gt;length</span>
<span id="L216" class="LineNr">216 </span> <span class="subxComment"># EBX : temp2</span>
<span id="L217" class="LineNr">217 </span> <span class="subxComment"># We can't allocate Look to a register because it gets written implicitly in</span>

2
html/subx/apps/crenshaw2-1b.subx.html
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@ -282,7 +282,7 @@ if ('onhashchange' in window) {
<span id="L216" class="LineNr">216 </span> <span class="subxComment"># ESI : in</span>
<span id="L217" class="LineNr">217 </span> <span class="subxComment"># EDI : out</span>
<span id="L218" class="LineNr">218 </span> <span class="subxComment"># EAX : temp</span>
<span id="L219" class="LineNr">219 </span> <span class="subxComment"># ECX : out-&gt;write</span>
<span id="L219" class="LineNr">219 </span> <span class="subxComment"># ECX : out-&gt;write (persisted back at end)</span>
<span id="L220" class="LineNr">220 </span> <span class="subxComment"># EDX : out-&gt;length</span>
<span id="L221" class="LineNr">221 </span> <span class="subxComment"># EBX : temp2</span>
<span id="L222" class="LineNr">222 </span> <span class="subxComment"># We can't allocate Look to a register because it gets written implicitly in</span>

9
subx/059read-byte.subx
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@ -81,7 +81,7 @@ $read-byte:from-stream:
# read byte from stream
# AL = f->data[f->read]
31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/ESI 1/index/ECX . 0/r32/AL 0x10/disp8 . # copy *(ESI+ECX+16) to AL
8a/copy-byte 1/mod/*+disp8 4/rm32/sib 6/base/ESI 1/index/ECX . 0/r32/AL 0x10/disp8 . # copy byte at *(ESI+ECX+16) to AL
# ++f->read
ff 0/subop/increment 1/mod/*+disp8 6/rm32/ESI . . . . 8/disp8 . # increment *(ESI+8)
$read-byte:end:
@ -234,6 +234,7 @@ test-read-byte-end-of-file:
== data
# a test buffered file for _test-stream
_test-buffered-file:
# file descriptor or (address stream)
_test-stream/imm32
@ -241,9 +242,9 @@ _test-buffered-file:
00 00 00 00
# current read index
00 00 00 00
# length (8)
08 00 00 00
# length (6)
06 00 00 00
# data
00 00 00 00 00 00 00 00 # 8 bytes
00 00 00 00 00 00 # 6 bytes
# . . vim:nowrap:textwidth=0

220
subx/064write-buffered.subx Normal file
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@ -0,0 +1,220 @@
# write-buffered: like 'write', but for a buffered-file
== code
# instruction effective address register displacement immediate
# . op subop mod rm32 base index scale r32
# . 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
# main:
#? e8/call test-write-buffered/disp32
#? e8/call test-write-buffered-with-intermediate-flush/disp32
e8/call run-tests/disp32 # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
# syscall(exit, Num-test-failures)
8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX
b8/copy-to-EAX 1/imm32
cd/syscall 0x80/imm8
write-buffered: # f : (address buffered-file), msg : (address array byte) -> <void>
# pseudocode:
# in = msg->data
# inend = &msg->data[msg->length]
# while in < inend
# if f->write >= f->length
# flush(f)
# clear-stream(f)
# f->data[f->write] = *in
# ++f->write
# ++in
#
# registers:
# ESI : in
# ECX : inend
# EDI : f
# EDX : f->length
# EBX : f->write (cached copy, need to keep in sync)
# EAX : temp
#
# . prolog
55/push-EBP
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
# . save registers
50/push-EAX
51/push-ECX
52/push-EDX
53/push-EBX
56/push-ESI
57/push-EDI
# EAX = msg
8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 0/r32/EAX 0xc/disp8 . # copy *(EBP+12) to EAX
# in/ESI = msg->data
8d/copy-address 1/mod/*+disp8 0/rm32/EAX . . . 6/r32/ESI 4/disp8 . # copy EAX+4 to ESI
# inend/ECX = &msg->data[msg->length]
8b/copy 0/mod/indirect 0/rm32/EAX . . . 1/r32/ECX . . # copy *EAX to ECX
8d/copy-address 0/mod/indirect 4/rm32/sib 6/base/ESI 1/index/ECX . 1/r32/ECX . . # copy ESI+ECX to ECX
# EDI = f
8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 7/r32/EDI 8/disp8 . # copy *(EBP+8) to EDI
# EDX = f->length
8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 2/r32/EDX 0xc/disp8 . # copy *(EDI+12) to EDX
# EBX = f->write
8b/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy *(EDI+4) to EBX
$write-buffered:loop:
# if (in >= inend) break
39/compare 3/mod/direct 6/rm32/ESI . . . 1/r32/ECX . . # compare ESI with ECX
7d/jump-if-greater-or-equal $write-buffered:loop-end/disp8
# if (f->write >= f->length) flush and clear f's stream
39/compare 3/mod/direct 3/rm32/EBX . . . 2/r32/EDX . . # compare EBX with EDX
7c/jump-if-lesser $write-buffered:to-stream/disp8
# . persist f->write
89/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy EBX to *(EDI+4)
# . flush(f)
# . . push args
57/push-EDI
# . . call
e8/call flush/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# . clear-stream(stream = f+4)
# . . push args
8d/copy-address 1/mod/*+disp8 7/rm32/EDI . . . 0/r32/EAX 4/disp8 . # copy EDI+4 to EAX
50/push-EAX
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# . clear EBX (cached f->write)
31/xor 3/mod/direct 3/rm32/EBX . . . 3/r32/EBX . . # clear EBX
$write-buffered:to-stream:
# write to stream
# f->data[f->write] = *in
# . AL = *in
31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX
8a/copy-byte 0/mod/indirect 6/rm32/ESI . . . 0/r32/AL . . # copy byte at *ESI to AL
# . f->data[f->write] = AL
88/copy-byte 1/mod/*+disp8 4/rm32/sib 7/base/EDI 3/index/EBX . 0/r32/AL 0x10/disp8 . # copy AL to *(EDI+EBX+16)
# ++f->write
43/increment-EBX
# ++in
46/increment-ESI
eb/jump $write-buffered:loop/disp8
$write-buffered:loop-end:
# persist necessary variables from registers
89/copy 1/mod/*+disp8 7/rm32/EDI . . . 3/r32/EBX 4/disp8 . # copy EBX to *(EDI+4)
$write-buffered:end:
# . restore registers
5f/pop-to-EDI
5e/pop-to-ESI
5b/pop-to-EBX
5a/pop-to-EDX
59/pop-to-ECX
58/pop-to-EAX
# . epilog
89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP
5d/pop-to-EBP
c3/return
test-write-buffered:
# - check that write-buffered writes to the file
# setup
# . clear-stream(_test-stream)
# . . push args
68/push _test-stream/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# . clear-stream(_test-buffered-file+4)
# . . push args
b8/copy-to-EAX _test-buffered-file/imm32
05/add-to-EAX 4/imm32
50/push-EAX
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# write-buffered(_test-buffered-file, "Abc")
# . . push args
68/push "Abc"/imm32
68/push _test-buffered-file/imm32
# . . call
e8/call write-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# flush(_test-buffered-file)
# . . push args
68/push _test-buffered-file/imm32
# . . call
e8/call flush/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# check-ints-equal(*_test-stream->data, "Abc", msg)
# . . push args
68/push "F - test-write-buffered-single"/imm32
68/push 0x636241/imm32
# . . push *_test-stream->data
b8/copy-to-EAX _test-stream/imm32
ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 0xc/disp8 . # push *(EAX+12)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
# . end
c3/return
test-write-buffered-with-intermediate-flush:
# - check that write-buffered flushes in the middle if its buffer fills up
# setup
# . clear-stream(_test-stream)
# . . push args
68/push _test-stream/imm32
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# . clear-stream(_test-buffered-file+4)
# . . push args
b8/copy-to-EAX _test-buffered-file/imm32
05/add-to-EAX 4/imm32
50/push-EAX
# . . call
e8/call clear-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP
# _test-stream can hold 8 bytes, but _test-buffered-file can hold only 6.
# Try to write 7 bytes.
# . write-buffered(_test-buffered-file, "Abcdefg")
# . . push args
68/push "Abcdefg"/imm32
68/push _test-buffered-file/imm32
# . . call
e8/call write-buffered/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP
# don't flush
# 6 bytes should still have gotten to _test-stream
# . check-ints-equal(*_test-stream->write, 6, msg)
# . . push args
68/push "F - test-write-buffered-with-intermediate-flush: flushed data"/imm32
68/push 6/imm32
# . . push *_test-stream->write
b8/copy-to-EAX _test-stream/imm32
ff 6/subop/push 0/mod/indirect 0/rm32/EAX . . . . . . # push *EAX
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
# and 1 byte should still be in _test-buffered-file
# . check-ints-equal(*_test-buffered-file>write, 1, msg)
# . . push args
68/push "F - test-write-buffered-with-intermediate-flush: unflushed bytes"/imm32
68/push 1/imm32
# . . push *_test-buffered-file->write
b8/copy-to-EAX _test-buffered-file/imm32
ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 4/disp8 . # push *(EAX+4)
# . . call
e8/call check-ints-equal/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
# . end
c3/return
# . . vim:nowrap:textwidth=0

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@ -211,7 +211,7 @@ get-num: # in : (address buffered-file), out : (address stream), err : fd or (a
# ESI : in
# EDI : out
# EAX : temp
# ECX : out->write
# ECX : out->write (persisted back at end)
# EDX : out->length
# EBX : temp2
# We can't allocate Look to a register because it gets written implicitly in

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@ -216,7 +216,7 @@ get-num: # in : (address buffered-file), out : (address stream), err : fd or (a
# ESI : in
# EDI : out
# EAX : temp
# ECX : out->write
# ECX : out->write (persisted back at end)
# EDX : out->length
# EBX : temp2
# We can't allocate Look to a register because it gets written implicitly in

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