143 lines
9.2 KiB
HTML
143 lines
9.2 KiB
HTML
<!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 - linux/factorial3.subx</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: #ffffd7; }
|
|
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #ffffd7; }
|
|
a { color:inherit; }
|
|
* { font-size:12pt; font-size: 1em; }
|
|
.subxComment { color: #005faf; }
|
|
.SpecialChar { color: #d70000; }
|
|
.LineNr { }
|
|
.subxTest { color: #5f8700; }
|
|
.subxS1Comment { color: #0000af; }
|
|
.subxFunction { color: #af5f00; text-decoration: underline; }
|
|
.Constant { color: #008787; }
|
|
-->
|
|
</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/linux/factorial3.subx'>https://github.com/akkartik/mu/blob/main/linux/factorial3.subx</a>
|
|
<pre id='vimCodeElement'>
|
|
<span id="L1" class="LineNr"> 1 </span><span class="subxComment">## compute the factorial of 5, and return the result in the exit code</span>
|
|
<span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
|
|
<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># Uses syntax sugar for:</span>
|
|
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># rm32 operands</span>
|
|
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># function calls</span>
|
|
<span id="L6" class="LineNr"> 6 </span><span class="subxComment">#</span>
|
|
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># To run:</span>
|
|
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># $ ./translate_subx init.linux [01]*.subx factorial.subx -o factorial</span>
|
|
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># $ bootstrap/bootstrap run factorial</span>
|
|
<span id="L10" class="LineNr">10 </span><span class="subxComment"># Expected result:</span>
|
|
<span id="L11" class="LineNr">11 </span><span class="subxComment"># $ echo $?</span>
|
|
<span id="L12" class="LineNr">12 </span><span class="subxComment"># 120</span>
|
|
<span id="L13" class="LineNr">13 </span><span class="subxComment">#</span>
|
|
<span id="L14" class="LineNr">14 </span><span class="subxComment"># You can also run the automated test suite:</span>
|
|
<span id="L15" class="LineNr">15 </span><span class="subxComment"># $ bootstrap/bootstrap run factorial test</span>
|
|
<span id="L16" class="LineNr">16 </span><span class="subxComment"># Expected output:</span>
|
|
<span id="L17" class="LineNr">17 </span><span class="subxComment"># ........</span>
|
|
<span id="L18" class="LineNr">18 </span><span class="subxComment"># Every '.' indicates a passing test. Failing tests get a 'F'.</span>
|
|
<span id="L19" class="LineNr">19 </span><span class="subxComment">#</span>
|
|
<span id="L20" class="LineNr">20 </span><span class="subxComment"># Compare factorial2.subx</span>
|
|
<span id="L21" class="LineNr">21 </span>
|
|
<span id="L22" class="LineNr">22 </span>== code
|
|
<span id="L23" class="LineNr">23 </span>
|
|
<span id="L24" class="LineNr">24 </span><span class="subxFunction">factorial</span>: <span class="subxComment"># n: int -> _/eax: int</span>
|
|
<span id="L25" class="LineNr">25 </span> <span class="subxS1Comment"># . prologue</span>
|
|
<span id="L26" class="LineNr">26 </span> 55/push-ebp
|
|
<span id="L27" class="LineNr">27 </span> 89/<- %ebp 4/r32/esp
|
|
<span id="L28" class="LineNr">28 </span> <span class="subxComment"># save registers</span>
|
|
<span id="L29" class="LineNr">29 </span> 51/push-ecx
|
|
<span id="L30" class="LineNr">30 </span> <span class="subxComment"># if (n <= 1) return 1</span>
|
|
<span id="L31" class="LineNr">31 </span> b8/copy-to-eax 1/imm32
|
|
<span id="L32" class="LineNr">32 </span> 81 7/subop/compare *(ebp+8) 1/imm32
|
|
<span id="L33" class="LineNr">33 </span> 7e/jump-if-<= $factorial:end/disp8
|
|
<span id="L34" class="LineNr">34 </span> <span class="subxComment"># n > 1; return n * factorial(n-1)</span>
|
|
<span id="L35" class="LineNr">35 </span> 8b/-> *(ebp+8) 1/r32/ecx
|
|
<span id="L36" class="LineNr">36 </span> 49/decrement-ecx
|
|
<span id="L37" class="LineNr">37 </span> (<a href='factorial3.subx.html#L24'>factorial</a> %ecx) <span class="subxComment"># => eax</span>
|
|
<span id="L38" class="LineNr">38 </span> f7 4/subop/multiply-into-eax *(ebp+8)
|
|
<span id="L39" class="LineNr">39 </span> <span class="subxComment"># TODO: check for overflow</span>
|
|
<span id="L40" class="LineNr">40 </span><span class="Constant">$factorial:end</span>:
|
|
<span id="L41" class="LineNr">41 </span> <span class="subxComment"># restore registers</span>
|
|
<span id="L42" class="LineNr">42 </span> 59/pop-to-ecx
|
|
<span id="L43" class="LineNr">43 </span> <span class="subxS1Comment"># . epilogue</span>
|
|
<span id="L44" class="LineNr">44 </span> 89/<- %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="L47" class="LineNr">47 </span>
|
|
<span id="L48" class="LineNr">48 </span><span class="subxTest">test-factorial</span>:
|
|
<span id="L49" class="LineNr">49 </span> (<a href='factorial3.subx.html#L24'>factorial</a> 5)
|
|
<span id="L50" class="LineNr">50 </span> (<a href='102test.subx.html#L23'>check-ints-equal</a> %eax 0x78 <span class="Constant">"F - test-factorial"</span>)
|
|
<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="SpecialChar">Entry</span>: <span class="subxComment"># run tests if necessary, compute `factorial(5)` if not</span>
|
|
<span id="L54" class="LineNr">54 </span> <span class="subxS1Comment"># . prologue</span>
|
|
<span id="L55" class="LineNr">55 </span> 89/<- %ebp 4/r32/esp
|
|
<span id="L56" class="LineNr">56 </span>
|
|
<span id="L57" class="LineNr">57 </span> <span class="subxComment"># initialize heap (needed by tests elsewhere)</span>
|
|
<span id="L58" class="LineNr">58 </span> (<a href='104new-segment.subx.html#L40'>new-segment</a> *<span class="SpecialChar"><a href='120allocate.subx.html#L34'>Heap-size</a></span> <span class="SpecialChar"><a href='120allocate.subx.html#L27'>Heap</a></span>)
|
|
<span id="L59" class="LineNr">59 </span>
|
|
<span id="L60" class="LineNr">60 </span> <span class="subxComment"># if (argc <= 1) return factorial(5)</span>
|
|
<span id="L61" class="LineNr">61 </span> 81 7/subop/compare *ebp 1/imm32
|
|
<span id="L62" class="LineNr">62 </span> 7f/jump-if-> $main:run-tests/disp8
|
|
<span id="L63" class="LineNr">63 </span> (<a href='factorial3.subx.html#L24'>factorial</a> 5) <span class="subxComment"># => eax</span>
|
|
<span id="L64" class="LineNr">64 </span> 89/<- %ebx 0/r32/eax
|
|
<span id="L65" class="LineNr">65 </span> eb/jump $main:end/disp8
|
|
<span id="L66" class="LineNr">66 </span><span class="Constant">$main:run-tests</span>:
|
|
<span id="L67" class="LineNr">67 </span> <span class="subxComment"># otherwise if first arg is "test", then return run_tests()</span>
|
|
<span id="L68" class="LineNr">68 </span> <span class="subxComment"># if (!kernel-string-equal?(argv[1], "test")) goto do-nothing</span>
|
|
<span id="L69" class="LineNr">69 </span> (<a href='103kernel-string-equal.subx.html#L31'>kernel-string-equal?</a> *(ebp+8) <span class="Constant">"test"</span>) <span class="subxComment"># => eax</span>
|
|
<span id="L70" class="LineNr">70 </span> 3d/compare-eax-and 0/imm32/false
|
|
<span id="L71" class="LineNr">71 </span> 74/jump-if-= $main:do-nothing/disp8
|
|
<span id="L72" class="LineNr">72 </span> <span class="subxComment">#</span>
|
|
<span id="L73" class="LineNr">73 </span> (run-tests)
|
|
<span id="L74" class="LineNr">74 </span> <span class="subxComment"># exit(*Num-test-failures)</span>
|
|
<span id="L75" class="LineNr">75 </span> 8b/-> *<span class="SpecialChar"><a href='102test.subx.html#L89'>Num-test-failures</a></span> 3/r32/ebx
|
|
<span id="L76" class="LineNr">76 </span> eb/jump $main:end/disp8
|
|
<span id="L77" class="LineNr">77 </span><span class="Constant">$main:do-nothing</span>:
|
|
<span id="L78" class="LineNr">78 </span> bb/copy-to-ebx 0/imm32
|
|
<span id="L79" class="LineNr">79 </span><span class="Constant">$main:end</span>:
|
|
<span id="L80" class="LineNr">80 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
|
|
</pre>
|
|
</body>
|
|
</html>
|
|
<!-- vim: set foldmethod=manual : -->
|