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| author | Kartik Agaram <vc@akkartik.com> | 2021-03-23 17:31:08 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2021-03-23 17:31:08 -0700 |
| commit | 3350c34a74844e21ea69077e01efff3bae64bdcd (patch) | |
| tree | fa06ba58542297d1cff6b78958d4547a40a25d21 /html/linux/bootstrap/021div.cc.html | |
| parent | 62a244211024a8367332541c571621883c05bcce (diff) | |
| download | mu-3350c34a74844e21ea69077e01efff3bae64bdcd.tar.gz | |
.
Diffstat (limited to 'html/linux/bootstrap/021div.cc.html')
| -rw-r--r-- | html/linux/bootstrap/021div.cc.html | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/html/linux/bootstrap/021div.cc.html b/html/linux/bootstrap/021div.cc.html new file mode 100644 index 00000000..6b735134 --- /dev/null +++ b/html/linux/bootstrap/021div.cc.html @@ -0,0 +1,100 @@ +<!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/bootstrap/021div.cc</title> +<meta name="Generator" content="Vim/8.1"> +<meta name="plugin-version" content="vim8.1_v1"> +<meta name="syntax" content="cpp"> +<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; } +.cSpecial { color: #008000; } +.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; } +.LineNr { } +.Constant { color: #008787; } +.Comment { color: #005faf; } +.Delimiter { color: #c000c0; } +.Identifier { color: #af5f00; } +--> +</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/bootstrap/021div.cc'>https://github.com/akkartik/mu/blob/main/linux/bootstrap/021div.cc</a> +<pre id='vimCodeElement'> +<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: helper for division operations: sign-extend EAX into EDX</span> +<span id="L2" class="LineNr"> 2 </span> +<span id="L3" class="LineNr"> 3 </span><span class="Delimiter">:(before "End Initialize Op Names")</span> +<span id="L4" class="LineNr"> 4 </span><a href='001help.cc.html#L237'>put_new</a><span class="Delimiter">(</span><a href='010vm.cc.html#L355'>Name</a><span class="Delimiter">,</span> <span class="Constant">"99"</span><span class="Delimiter">,</span> <span class="Constant">"sign-extend <a href='010vm.cc.html#L10'>EAX</a> into <a href='010vm.cc.html#L12'>EDX</a> (cdq)"</span><span class="Delimiter">);</span> +<span id="L5" class="LineNr"> 5 </span> +<span id="L6" class="LineNr"> 6 </span><span class="Delimiter">:(code)</span> +<span id="L7" class="LineNr"> 7 </span><span class="Normal">void</span> <a href='021div.cc.html#L7'>test_cdq</a><span class="Delimiter">()</span> <span class="Delimiter">{</span> +<span id="L8" class="LineNr"> 8 </span> Reg[EAX]<span class="Delimiter">.</span>i = <span class="Constant">10</span><span class="Delimiter">;</span> +<span id="L9" class="LineNr"> 9 </span> <a href='011run.cc.html#L82'>run</a><span class="Delimiter">(</span> +<span id="L10" class="LineNr">10 </span> <span class="Constant">"== code 0x1</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L11" class="LineNr">11 </span> <span class="Constant">"99</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L12" class="LineNr">12 </span> <span class="Delimiter">);</span> +<span id="L13" class="LineNr">13 </span> <a href='003trace.cc.html#L290'>CHECK_TRACE_CONTENTS</a><span class="Delimiter">(</span> +<span id="L14" class="LineNr">14 </span> <span class="Constant">"run: sign-extend <a href='010vm.cc.html#L10'>EAX</a> into <a href='010vm.cc.html#L12'>EDX</a></span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L15" class="LineNr">15 </span> <span class="Constant">"run: <a href='010vm.cc.html#L12'>EDX</a> is now 0x00000000</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L16" class="LineNr">16 </span> <span class="Delimiter">);</span> +<span id="L17" class="LineNr">17 </span><span class="Delimiter">}</span> +<span id="L18" class="LineNr">18 </span> +<span id="L19" class="LineNr">19 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L20" class="LineNr">20 </span><span class="Normal">case</span> <span class="Constant">0x99</span>: <span class="Delimiter">{</span> <span class="Comment">// sign-extend EAX into EDX</span> +<span id="L21" class="LineNr">21 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span>Callstack_depth+<span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"sign-extend <a href='010vm.cc.html#L10'>EAX</a> into EDX"</span> << end<span class="Delimiter">();</span> +<span id="L22" class="LineNr">22 </span> Reg[EDX]<span class="Delimiter">.</span>i = <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>i < <span class="Constant">0</span><span class="Delimiter">)</span> ? -<span class="Constant">1</span> : <span class="Constant">0</span><span class="Delimiter">;</span> +<span id="L23" class="LineNr">23 </span> <a href='003trace.cc.html#L96'>trace</a><span class="Delimiter">(</span>Callstack_depth+<span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"EDX is now 0x"</span> << <a href='010vm.cc.html#L408'>HEXWORD</a> << Reg[EDX]<span class="Delimiter">.</span>u << end<span class="Delimiter">();</span> +<span id="L24" class="LineNr">24 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L25" class="LineNr">25 </span><span class="Delimiter">}</span> +<span id="L26" class="LineNr">26 </span> +<span id="L27" class="LineNr">27 </span><span class="Delimiter">:(code)</span> +<span id="L28" class="LineNr">28 </span><span class="Normal">void</span> <a href='021div.cc.html#L28'>test_cdq_negative</a><span class="Delimiter">()</span> <span class="Delimiter">{</span> +<span id="L29" class="LineNr">29 </span> Reg[EAX]<span class="Delimiter">.</span>i = -<span class="Constant">10</span><span class="Delimiter">;</span> +<span id="L30" class="LineNr">30 </span> <a href='011run.cc.html#L82'>run</a><span class="Delimiter">(</span> +<span id="L31" class="LineNr">31 </span> <span class="Constant">"== code 0x1</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L32" class="LineNr">32 </span> <span class="Constant">"99</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L33" class="LineNr">33 </span> <span class="Delimiter">);</span> +<span id="L34" class="LineNr">34 </span> <a href='003trace.cc.html#L290'>CHECK_TRACE_CONTENTS</a><span class="Delimiter">(</span> +<span id="L35" class="LineNr">35 </span> <span class="Constant">"run: sign-extend <a href='010vm.cc.html#L10'>EAX</a> into <a href='010vm.cc.html#L12'>EDX</a></span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L36" class="LineNr">36 </span> <span class="Constant">"run: <a href='010vm.cc.html#L12'>EDX</a> is now 0xffffffff</span><span class="cSpecial">\n</span><span class="Constant">"</span> +<span id="L37" class="LineNr">37 </span> <span class="Delimiter">);</span> +<span id="L38" class="LineNr">38 </span><span class="Delimiter">}</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |