From 52e3ea8a4bec791e4c2d64fb8aca9e26cdf60f25 Mon Sep 17 00:00:00 2001
From: Kartik Agaram <vc@akkartik.com>
Date: Sun, 15 Aug 2021 23:44:43 -0700
Subject: .

---
 html/112read-byte.subx.html | 144 +++++++++++++++++++++++++++-----------------
 1 file changed, 88 insertions(+), 56 deletions(-)

(limited to 'html/112read-byte.subx.html')
diff --git a/html/112read-byte.subx.html b/html/112read-byte.subx.html
index c639aa56..cfdfe994 100644
--- a/html/112read-byte.subx.html
+++ b/html/112read-byte.subx.html
@@ -1,31 +1,31 @@
-<!DOCTYPE html>
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
 <html>
 <head>
-<meta charset="UTF-8">
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
 <title>Mu - 112read-byte.subx</title>
-<meta name="Generator" content="Vim/8.2">
-<meta name="plugin-version" content="vim8.1_v2">
+<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,no_foldcolumn,expand_tabs,line_ids,prevent_copy=,use_input_for_pc=fallback">
+<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
 <meta name="colorscheme" content="minimal-light">
-<style>
+<style type="text/css">
 <!--
 pre { 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; }
-.subxS2Comment { color: #8a8a8a; }
-.LineNr { }
-.subxFunction { color: #af5f00; text-decoration: underline; }
 .subxS1Comment { color: #0000af; }
+.subxMinorFunction { color: #875f5f; }
+.LineNr { }
 .Constant { color: #008787; }
+.subxS2Comment { color: #8a8a8a; }
+.subxFunction { color: #af5f00; text-decoration: underline; }
 .Normal { color: #000000; background-color: #ffffd7; padding-bottom: 1px; }
-.subxMinorFunction { color: #875f5f; }
 -->
 </style>
 
-<script>
+<script type='text/javascript'>
 <!--
 
 /* function to open any folds containing a jumped-to line before jumping to it */
@@ -101,49 +101,49 @@ if ('onhashchange' in window) {
 <span id="L42" class="LineNr"> 42 </span>    (<a href='317abort.subx.html#L5'>abort</a> <span class="Constant">&quot;read-byte: empty stream&quot;</span>)
 <span id="L43" class="LineNr"> 43 </span>    <span class="subxComment"># never gets here</span>
 <span id="L44" class="LineNr"> 44 </span>
-<span id="L45" class="LineNr"> 45 </span>== data
-<span id="L46" class="LineNr"> 46 </span>
-<span id="L47" class="LineNr"> 47 </span><span class="subxMinorFunction">_test-input-stream</span>:  <span class="subxComment"># (stream byte)</span>
-<span id="L48" class="LineNr"> 48 </span>    <span class="subxComment"># current write index</span>
-<span id="L49" class="LineNr"> 49 </span>    0/imm32
-<span id="L50" class="LineNr"> 50 </span><span class="Constant">$_test-input-stream-&gt;read</span>:
-<span id="L51" class="LineNr"> 51 </span>    <span class="subxComment"># current read index</span>
-<span id="L52" class="LineNr"> 52 </span>    0/imm32
-<span id="L53" class="LineNr"> 53 </span>    <span class="subxComment"># size</span>
-<span id="L54" class="LineNr"> 54 </span>    0x400/imm32  <span class="subxComment"># 1024 bytes</span>
-<span id="L55" class="LineNr"> 55 </span>    <span class="subxComment"># data (64 lines x 16 bytes/line)</span>
-<span id="L56" class="LineNr"> 56 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L57" class="LineNr"> 57 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L58" class="LineNr"> 58 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L59" class="LineNr"> 59 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L60" class="LineNr"> 60 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L61" class="LineNr"> 61 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L62" class="LineNr"> 62 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L63" class="LineNr"> 63 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L64" class="LineNr"> 64 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L65" class="LineNr"> 65 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L66" class="LineNr"> 66 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L67" class="LineNr"> 67 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L68" class="LineNr"> 68 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L69" class="LineNr"> 69 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L70" class="LineNr"> 70 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L71" class="LineNr"> 71 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L72" class="LineNr"> 72 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L73" class="LineNr"> 73 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L74" class="LineNr"> 74 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L75" class="LineNr"> 75 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L76" class="LineNr"> 76 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L77" class="LineNr"> 77 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L78" class="LineNr"> 78 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L79" class="LineNr"> 79 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L80" class="LineNr"> 80 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L81" class="LineNr"> 81 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L82" class="LineNr"> 82 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L83" class="LineNr"> 83 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L84" class="LineNr"> 84 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L85" class="LineNr"> 85 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L86" class="LineNr"> 86 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L87" class="LineNr"> 87 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L45" class="LineNr"> 45 </span><span class="subxComment"># Return next byte value in eax, with top 3 bytes cleared.</span>
+<span id="L46" class="LineNr"> 46 </span><span class="subxComment"># Abort on reaching end of stream.</span>
+<span id="L47" class="LineNr"> 47 </span><span class="subxFunction">peek-byte</span>:  <span class="subxComment"># s: (addr stream byte) -&gt; result/eax: byte</span>
+<span id="L48" class="LineNr"> 48 </span>    <span class="subxS1Comment"># . prologue</span>
+<span id="L49" class="LineNr"> 49 </span>    55/push-ebp
+<span id="L50" class="LineNr"> 50 </span>    89/copy                         3/mod/direct    5/rm32/ebp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          4/r32/esp  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># copy esp to ebp</span>
+<span id="L51" class="LineNr"> 51 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L52" class="LineNr"> 52 </span>    51/push-ecx
+<span id="L53" class="LineNr"> 53 </span>    56/push-esi
+<span id="L54" class="LineNr"> 54 </span>    <span class="subxComment"># esi = s</span>
+<span id="L55" class="LineNr"> 55 </span>    8b/copy                         1/mod/*+disp8   5/rm32/ebp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          6/r32/esi   8/disp8        <span class="Normal"> . </span>                <span class="subxComment"># copy *(ebp+8) to esi</span>
+<span id="L56" class="LineNr"> 56 </span>    <span class="subxComment"># ecx = s-&gt;read</span>
+<span id="L57" class="LineNr"> 57 </span>    8b/copy                         1/mod/*+disp8   6/rm32/esi   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          1/r32/ecx   4/disp8        <span class="Normal"> . </span>                <span class="subxComment"># copy *(esi+4) to ecx</span>
+<span id="L58" class="LineNr"> 58 </span>    <span class="subxComment"># if (f-&gt;read &gt;= f-&gt;write) abort</span>
+<span id="L59" class="LineNr"> 59 </span>    3b/compare                      0/mod/indirect  6/rm32/esi   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          1/r32/ecx  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># compare ecx with *esi</span>
+<span id="L60" class="LineNr"> 60 </span>    0f 8d/jump-if-&gt;=  $peek-byte:<a href='317abort.subx.html#L5'>abort</a>/disp32
+<span id="L61" class="LineNr"> 61 </span>    <span class="subxComment"># result = f-&gt;data[f-&gt;read]</span>
+<span id="L62" class="LineNr"> 62 </span>    31/xor                          3/mod/direct    0/rm32/eax   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          0/r32/eax  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># clear eax</span>
+<span id="L63" class="LineNr"> 63 </span>    8a/copy-byte                    1/mod/*+disp8   4/rm32/sib    6/base/esi  1/index/ecx  <span class="Normal"> . </span>          0/r32/AL    0xc/disp8      <span class="Normal"> . </span>                <span class="subxComment"># copy byte at *(esi+ecx+12) to AL</span>
+<span id="L64" class="LineNr"> 64 </span><span class="Constant">$peek-byte:end</span>:
+<span id="L65" class="LineNr"> 65 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L66" class="LineNr"> 66 </span>    5e/pop-to-esi
+<span id="L67" class="LineNr"> 67 </span>    59/pop-to-ecx
+<span id="L68" class="LineNr"> 68 </span>    <span class="subxS1Comment"># . epilogue</span>
+<span id="L69" class="LineNr"> 69 </span>    89/copy                         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          5/r32/ebp  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># copy ebp to esp</span>
+<span id="L70" class="LineNr"> 70 </span>    5d/pop-to-ebp
+<span id="L71" class="LineNr"> 71 </span>    c3/return
+<span id="L72" class="LineNr"> 72 </span>
+<span id="L73" class="LineNr"> 73 </span><span class="Constant">$peek-byte:<a href='317abort.subx.html#L5'>abort</a></span>:
+<span id="L74" class="LineNr"> 74 </span>    (<a href='317abort.subx.html#L5'>abort</a> <span class="Constant">&quot;peek-byte: empty stream&quot;</span>)
+<span id="L75" class="LineNr"> 75 </span>    <span class="subxComment"># never gets here</span>
+<span id="L76" class="LineNr"> 76 </span>
+<span id="L77" class="LineNr"> 77 </span>== data
+<span id="L78" class="LineNr"> 78 </span>
+<span id="L79" class="LineNr"> 79 </span><span class="subxMinorFunction">_test-input-stream</span>:  <span class="subxComment"># (stream byte)</span>
+<span id="L80" class="LineNr"> 80 </span>    <span class="subxComment"># current write index</span>
+<span id="L81" class="LineNr"> 81 </span>    0/imm32
+<span id="L82" class="LineNr"> 82 </span><span class="Constant">$_test-input-stream-&gt;read</span>:
+<span id="L83" class="LineNr"> 83 </span>    <span class="subxComment"># current read index</span>
+<span id="L84" class="LineNr"> 84 </span>    0/imm32
+<span id="L85" class="LineNr"> 85 </span>    <span class="subxComment"># size</span>
+<span id="L86" class="LineNr"> 86 </span>    0x400/imm32  <span class="subxComment"># 1024 bytes</span>
+<span id="L87" class="LineNr"> 87 </span>    <span class="subxComment"># data (64 lines x 16 bytes/line)</span>
 <span id="L88" class="LineNr"> 88 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 <span id="L89" class="LineNr"> 89 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 <span id="L90" class="LineNr"> 90 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
@@ -176,8 +176,40 @@ if ('onhashchange' in window) {
 <span id="L117" class="LineNr">117 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 <span id="L118" class="LineNr">118 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 <span id="L119" class="LineNr">119 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-<span id="L120" class="LineNr">120 </span>
-<span id="L121" class="LineNr">121 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
+<span id="L120" class="LineNr">120 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L121" class="LineNr">121 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L122" class="LineNr">122 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L123" class="LineNr">123 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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+<span id="L125" class="LineNr">125 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L126" class="LineNr">126 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L127" class="LineNr">127 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L128" class="LineNr">128 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L129" class="LineNr">129 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L130" class="LineNr">130 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L131" class="LineNr">131 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L132" class="LineNr">132 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L133" class="LineNr">133 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L134" class="LineNr">134 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L135" class="LineNr">135 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L136" class="LineNr">136 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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+<span id="L147" class="LineNr">147 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L148" class="LineNr">148 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L149" class="LineNr">149 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L150" class="LineNr">150 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L151" class="LineNr">151 </span>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+<span id="L152" class="LineNr">152 </span>
+<span id="L153" class="LineNr">153 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
 </pre>
 </body>
 </html>
-- 
cgit 1.4.1-2-gfad0

