blob: 7796bd65eacc0a661dff07e336d865d8862a301b (
plain) (
tree)
|
|
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Mu - linux/406int32.mu</title>
<meta name="Generator" content="Vim/8.2">
<meta name="plugin-version" content="vim8.1_v2">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=,use_input_for_pc=fallback">
<meta name="colorscheme" content="minimal-light">
<style>
<!--
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; }
.PreProc { color: #c000c0; }
.LineNr { }
.Constant { color: #008787; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Delimiter { color: #c000c0; }
.muComment { color: #005faf; }
.Special { color: #ff6060; }
-->
</style>
<script>
<!--
/* 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/406int32.mu'>https://github.com/akkartik/mu/blob/main/linux/406int32.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Some slow but convenient helpers</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span><span class="muComment"># slow, iterative shift-left instruction</span>
<span id="L4" class="LineNr"> 4 </span><span class="muComment"># preconditions: _nr >= 0, _dr > 0</span>
<span id="L5" class="LineNr"> 5 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='406int32.mu.html#L5'>repeated-shift-left</a></span> nr: int, dr: int<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span>
<span id="L6" class="LineNr"> 6 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> copy nr
<span id="L7" class="LineNr"> 7 </span> <span class="Delimiter">{</span>
<span id="L8" class="LineNr"> 8 </span> compare dr, <span class="Constant">0</span>
<span id="L9" class="LineNr"> 9 </span> <span class="PreProc">break-if-<=</span>
<span id="L10" class="LineNr">10 </span> result <span class="Special"><-</span> shift-left <span class="Constant">1</span>
<span id="L11" class="LineNr">11 </span> decrement dr
<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> <span class="PreProc">return</span> result
<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="muComment"># slow, iterative shift-right instruction</span>
<span id="L18" class="LineNr">18 </span><span class="muComment"># preconditions: _nr >= 0, _dr > 0</span>
<span id="L19" class="LineNr">19 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='406int32.mu.html#L19'>repeated-shift-right</a></span> nr: int, dr: int<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span>
<span id="L20" class="LineNr">20 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> copy nr
<span id="L21" class="LineNr">21 </span> <span class="Delimiter">{</span>
<span id="L22" class="LineNr">22 </span> compare dr, <span class="Constant">0</span>
<span id="L23" class="LineNr">23 </span> <span class="PreProc">break-if-<=</span>
<span id="L24" class="LineNr">24 </span> result <span class="Special"><-</span> shift-right <span class="Constant">1</span>
<span id="L25" class="LineNr">25 </span> decrement dr
<span id="L26" class="LineNr">26 </span> <span class="PreProc">loop</span>
<span id="L27" class="LineNr">27 </span> <span class="Delimiter">}</span>
<span id="L28" class="LineNr">28 </span> <span class="PreProc">return</span> result
<span id="L29" class="LineNr">29 </span><span class="Delimiter">}</span>
<span id="L30" class="LineNr">30 </span>
<span id="L31" class="LineNr">31 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='406int32.mu.html#L31'>abs</a></span> n: int<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span>
<span id="L32" class="LineNr">32 </span> <span class="PreProc">var</span> result/eax: int <span class="Special"><-</span> copy n
<span id="L33" class="LineNr">33 </span> <span class="Delimiter">{</span>
<span id="L34" class="LineNr">34 </span> compare n, <span class="Constant">0</span>
<span id="L35" class="LineNr">35 </span> <span class="PreProc">break-if->=</span>
<span id="L36" class="LineNr">36 </span> result <span class="Special"><-</span> negate
<span id="L37" class="LineNr">37 </span> <span class="Delimiter">}</span>
<span id="L38" class="LineNr">38 </span> <span class="PreProc">return</span> result
<span id="L39" class="LineNr">39 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|