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author: Kartik K. Agaram <vc@akkartik.com> 2021-07-16 08:38:43 -0700
committer: Kartik K. Agaram <vc@akkartik.com> 2021-07-16 08:38:43 -0700
commit: 78357b8852626b510527f3b8d770a7dd8956fcc7 (patch)
tree: 5e38d0f616ab151e66618090487b41dd2fc348e0 /html/linux/apps/raytracing/2.mu.html
parent: 44d26b77c45668c9b0c99894a4294cec004361fe (diff)
download: mu-78357b8852626b510527f3b8d770a7dd8956fcc7.tar.gz
1 files changed, 153 insertions, 0 deletions
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+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<title>Mu - linux/apps/raytracing/2.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>
+<!--
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+}
+if ('onhashchange' in window) {
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+</head>
+<body onload='JumpToLine();'>
+<a href='https://github.com/akkartik/mu/blob/main/linux/apps/raytracing/2.mu'>https://github.com/akkartik/mu/blob/main/linux/apps/raytracing/2.mu</a>
+<pre id='vimCodeElement'>
+<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Listing 7 of <a href="https://raytracing.github.io/books/RayTracingInOneWeekend.html">https://raytracing.github.io/books/RayTracingInOneWeekend.html</a></span>
+<span id="L2" class="LineNr"> 2 </span><span class="muComment">#</span>
+<span id="L3" class="LineNr"> 3 </span><span class="muComment"># To run (on Linux):</span>
+<span id="L4" class="LineNr"> 4 </span><span class="muComment">#   $ git clone <a href="https://github.com/akkartik/mu">https://github.com/akkartik/mu</a></span>
+<span id="L5" class="LineNr"> 5 </span><span class="muComment">#   $ cd mu/linux</span>
+<span id="L6" class="LineNr"> 6 </span><span class="muComment">#   $ ./translate apps/raytracing/2.mu</span>
+<span id="L7" class="LineNr"> 7 </span><span class="muComment">#   $ ./a.elf &gt; 2.ppm</span>
+<span id="L8" class="LineNr"> 8 </span>
+<span id="L9" class="LineNr"> 9 </span><span class="PreProc">fn</span> <span class="muFunction">main</span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L10" class="LineNr">10 </span>  <a href='../../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;P3\n256 256\n255\n&quot;</span>
+<span id="L11" class="LineNr">11 </span>  <span class="PreProc">var</span> _four/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">4</span>
+<span id="L12" class="LineNr">12 </span>  <span class="PreProc">var</span> four/<span class="Constant">xmm1</span>: float <span class="Special">&lt;-</span> convert _four
+<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> one-fourth/<span class="Constant">xmm1</span>: float <span class="Special">&lt;-</span> reciprocal four
+<span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> max/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0xff</span>
+<span id="L15" class="LineNr">15 </span>  <span class="PreProc">var</span> image-size/<span class="Constant">xmm2</span>: float <span class="Special">&lt;-</span> convert max
+<span id="L16" class="LineNr">16 </span>  <span class="PreProc">var</span> j/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0xff</span>
+<span id="L17" class="LineNr">17 </span>  <span class="Delimiter">{</span>
+<span id="L18" class="LineNr">18 </span>    compare j, <span class="Constant">0</span>
+<span id="L19" class="LineNr">19 </span>    <span class="PreProc">break-if-&lt;</span>
+<span id="L20" class="LineNr">20 </span>    <span class="PreProc">var</span> i/eax: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L21" class="LineNr">21 </span>    <span class="Delimiter">{</span>
+<span id="L22" class="LineNr">22 </span>      compare i, <span class="Constant">0xff</span>
+<span id="L23" class="LineNr">23 </span>      <span class="PreProc">break-if-&gt;</span>
+<span id="L24" class="LineNr">24 </span>      <span class="PreProc">var</span> c: rgb
+<span id="L25" class="LineNr">25 </span>      <span class="muComment"># compute r</span>
+<span id="L26" class="LineNr">26 </span>      <span class="PreProc">var</span> tmp/<span class="Constant">xmm0</span>: float <span class="Special">&lt;-</span> convert i
+<span id="L27" class="LineNr">27 </span>      tmp <span class="Special">&lt;-</span> divide image-size
+<span id="L28" class="LineNr">28 </span>      <span class="PreProc">var</span> r-addr/<span class="muRegEdx">edx</span>: (addr float) <span class="Special">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> c, r
+<span id="L29" class="LineNr">29 </span>      copy-to *r-addr, tmp
+<span id="L30" class="LineNr">30 </span><span class="CommentedCode">#?       var tmp2/ebx: int &lt;- reinterpret *r-addr</span>
+<span id="L31" class="LineNr">31 </span><span class="CommentedCode">#?       print-int32-hex 0, tmp2</span>
+<span id="L32" class="LineNr">32 </span><span class="CommentedCode">#?       print-string 0, &quot;\n&quot;</span>
+<span id="L33" class="LineNr">33 </span>      <span class="muComment"># compute g</span>
+<span id="L34" class="LineNr">34 </span>      tmp <span class="Special">&lt;-</span> convert j
+<span id="L35" class="LineNr">35 </span>      tmp <span class="Special">&lt;-</span> divide image-size
+<span id="L36" class="LineNr">36 </span>      <span class="PreProc">var</span> g-addr/<span class="muRegEdx">edx</span>: (addr float) <span class="Special">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> c, g
+<span id="L37" class="LineNr">37 </span>      copy-to *g-addr, tmp
+<span id="L38" class="LineNr">38 </span>      <span class="muComment"># compute b</span>
+<span id="L39" class="LineNr">39 </span>      <span class="PreProc">var</span> b-addr/<span class="muRegEdx">edx</span>: (addr float) <span class="Special">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> c, b
+<span id="L40" class="LineNr">40 </span>      copy-to *b-addr, one-fourth
+<span id="L41" class="LineNr">41 </span>      <span class="muComment"># emit</span>
+<span id="L42" class="LineNr">42 </span>      <span class="PreProc">var</span> c-addr/<span class="muRegEdx">edx</span>: (addr rgb) <span class="Special">&lt;-</span> address c
+<span id="L43" class="LineNr">43 </span>      print-rgb <span class="Constant">0</span>, c-addr
+<span id="L44" class="LineNr">44 </span>      i <span class="Special">&lt;-</span> increment
+<span id="L45" class="LineNr">45 </span>      <span class="PreProc">loop</span>
+<span id="L46" class="LineNr">46 </span>    <span class="Delimiter">}</span>
+<span id="L47" class="LineNr">47 </span>    j <span class="Special">&lt;-</span> decrement
+<span id="L48" class="LineNr">48 </span>    <span class="PreProc">loop</span>
+<span id="L49" class="LineNr">49 </span>  <span class="Delimiter">}</span>
+<span id="L50" class="LineNr">50 </span>  <span class="PreProc">return</span> <span class="Constant">0</span>
+<span id="L51" class="LineNr">51 </span><span class="Delimiter">}</span>
+<span id="L52" class="LineNr">52 </span>
+<span id="L53" class="LineNr">53 </span><span class="PreProc">type</span> rgb <span class="Delimiter">{</span>
+<span id="L54" class="LineNr">54 </span>  <span class="muComment"># components normalized to within [0.0, 1.0]</span>
+<span id="L55" class="LineNr">55 </span>  r: float
+<span id="L56" class="LineNr">56 </span>  g: float
+<span id="L57" class="LineNr">57 </span>  b: float
+<span id="L58" class="LineNr">58 </span><span class="Delimiter">}</span>
+<span id="L59" class="LineNr">59 </span>
+<span id="L60" class="LineNr">60 </span><span class="muComment"># print translating to [0, 256)</span>
+<span id="L61" class="LineNr">61 </span><span class="PreProc">fn</span> <span class="muFunction">print-rgb</span> <a href='../../405screen.mu.html#L9'>screen</a>: (addr <a href='../../405screen.mu.html#L9'>screen</a>), _c: (addr rgb) <span class="Delimiter">{</span>
+<span id="L62" class="LineNr">62 </span>  <span class="PreProc">var</span> c/<span class="muRegEsi">esi</span>: (addr rgb) <span class="Special">&lt;-</span> copy _c
+<span id="L63" class="LineNr">63 </span>  <span class="PreProc">var</span> n/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0xff</span>  <span class="muComment"># turns out 255 works just as well as 255.999, which is lucky because we don't have floating-point literals</span>
+<span id="L64" class="LineNr">64 </span>  <span class="PreProc">var</span> xn/<span class="Constant">xmm1</span>: float <span class="Special">&lt;-</span> convert n
+<span id="L65" class="LineNr">65 </span>  <span class="muComment"># print 255 * c-&gt;r</span>
+<span id="L66" class="LineNr">66 </span>  <span class="PreProc">var</span> result/<span class="Constant">xmm0</span>: float <span class="Special">&lt;-</span> copy xn
+<span id="L67" class="LineNr">67 </span>  <span class="PreProc">var</span> src-addr/eax: (addr float) <span class="Special">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> c, r
+<span id="L68" class="LineNr">68 </span>  result <span class="Special">&lt;-</span> multiply *src-addr
+<span id="L69" class="LineNr">69 </span>  <span class="PreProc">var</span> result-int/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> convert result
+<span id="L70" class="LineNr">70 </span>  <a href='../../405screen.mu.html#L484'>print-int32-decimal</a> <a href='../../405screen.mu.html#L9'>screen</a>, result-int
+<span id="L71" class="LineNr">71 </span>  <a href='../../405screen.mu.html#L169'>print-string</a> <a href='../../405screen.mu.html#L9'>screen</a>, <span class="Constant">&quot; &quot;</span>
+<span id="L72" class="LineNr">72 </span>  <span class="muComment"># print 255 * c-&gt;g</span>
+<span id="L73" class="LineNr">73 </span>  src-addr <span class="Special">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> c, g
+<span id="L74" class="LineNr">74 </span>  result <span class="Special">&lt;-</span> copy xn
+<span id="L75" class="LineNr">75 </span>  result <span class="Special">&lt;-</span> multiply *src-addr
+<span id="L76" class="LineNr">76 </span>  result-int <span class="Special">&lt;-</span> convert result
+<span id="L77" class="LineNr">77 </span>  <a href='../../405screen.mu.html#L484'>print-int32-decimal</a> <a href='../../405screen.mu.html#L9'>screen</a>, result-int
+<span id="L78" class="LineNr">78 </span>  <a href='../../405screen.mu.html#L169'>print-string</a> <a href='../../405screen.mu.html#L9'>screen</a>, <span class="Constant">&quot; &quot;</span>
+<span id="L79" class="LineNr">79 </span>  <span class="muComment"># print 255 * c-&gt;b</span>
+<span id="L80" class="LineNr">80 </span>  src-addr <span class="Special">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> c, b
+<span id="L81" class="LineNr">81 </span>  result <span class="Special">&lt;-</span> copy xn
+<span id="L82" class="LineNr">82 </span>  result <span class="Special">&lt;-</span> multiply *src-addr
+<span id="L83" class="LineNr">83 </span>  result-int <span class="Special">&lt;-</span> convert result
+<span id="L84" class="LineNr">84 </span>  <a href='../../405screen.mu.html#L484'>print-int32-decimal</a> <a href='../../405screen.mu.html#L9'>screen</a>, result-int
+<span id="L85" class="LineNr">85 </span>  <a href='../../405screen.mu.html#L169'>print-string</a> <a href='../../405screen.mu.html#L9'>screen</a>, <span class="Constant">&quot;\n&quot;</span>
+<span id="L86" class="LineNr">86 </span><span class="Delimiter">}</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->
author	Kartik K. Agaram <vc@akkartik.com>	2021-07-16 08:38:43 -0700
committer	Kartik K. Agaram <vc@akkartik.com>	2021-07-16 08:38:43 -0700
commit	78357b8852626b510527f3b8d770a7dd8956fcc7 (patch)
tree	5e38d0f616ab151e66618090487b41dd2fc348e0 /html/linux/apps/raytracing/2.mu.html
parent	44d26b77c45668c9b0c99894a4294cec004361fe (diff)
download	mu-78357b8852626b510527f3b8d770a7dd8956fcc7.tar.gz