4921

1 files changed, 39 insertions, 2 deletions

diff --git a/html/subx/021byte_addressing.cc.html b/html/subx/021byte_addressing.cc.html
index 71b63a6a..0ddbdc29 100644
--- a/html/subx/021byte_addressing.cc.html
+++ b/html/subx/021byte_addressing.cc.html
@@ -15,6 +15,7 @@ body { font-size:12pt; font-family: monospace; color: #000000; background-color:
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
 .traceContains { color: #005f00; }
+.PreProc { color: #c000c0; }
 .LineNr { }
 .Constant { color: #008787; }
 .Delimiter { color: #c000c0; }
@@ -108,7 +109,7 @@ if ('onhashchange' in window) {
 <span id="L48" class="LineNr"> 48 </span>  <span class="Constant">88</span>  <span class="Constant">18</span>                                      <span class="Comment"># copy BL to the byte at *EAX</span>
 <span id="L49" class="LineNr"> 49 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src BL) 000 (dest EAX)</span>
 <span id="L50" class="LineNr"> 50 </span>== <span class="Constant">0x2000</span>
-<span id="L51" class="LineNr"> 51 </span>f0 cc bb aa  <span class="Comment"># 0xf0 with more data in following bytes</span>
+<span id="L51" class="LineNr"> 51 </span>f0 cc bb aa
 <span id="L52" class="LineNr"> 52 </span><span class="traceContains">+run: copy BL to r8/m8-at-r32</span>
 <span id="L53" class="LineNr"> 53 </span><span class="traceContains">+run: effective address is 0x00002000 (EAX)</span>
 <span id="L54" class="LineNr"> 54 </span><span class="traceContains">+run: storing 0xab</span>
@@ -158,7 +159,7 @@ if ('onhashchange' in window) {
 <span id="L98" class="LineNr"> 98 </span>  <a href='003trace.cc.html#L183'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;storing 0x&quot;</span> &lt;&lt; <a href='010---vm.cc.html#L412'>HEXBYTE</a> &lt;&lt; <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>*src<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
 <span id="L99" class="LineNr"> 99 </span>  *dest = *src<span class="Delimiter">;</span>
 <span id="L100" class="LineNr">100 </span>  <span class="Normal">const</span> <span class="Normal">uint8_t</span> rdest_32bit = rdest &amp; <span class="Constant">0x3</span><span class="Delimiter">;</span>
-<span id="L101" class="LineNr">101 </span>  <a href='003trace.cc.html#L183'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <a href='013direct_addressing.cc.html#L62'>rname</a><span class="Delimiter">(</span>rdest_32bit<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; now contains 0x&quot;</span> &lt;&lt; <a href='010---vm.cc.html#L413'>HEXWORD</a> &lt;&lt; <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[rdest_32bit]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
+<span id="L101" class="LineNr">101 </span>  <a href='003trace.cc.html#L183'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <a href='013direct_addressing.cc.html#L63'>rname</a><span class="Delimiter">(</span>rdest_32bit<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; now contains 0x&quot;</span> &lt;&lt; <a href='010---vm.cc.html#L413'>HEXWORD</a> &lt;&lt; <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[rdest_32bit]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
 <span id="L102" class="LineNr">102 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
 <span id="L103" class="LineNr">103 </span><span class="Delimiter">}</span>
 <span id="L104" class="LineNr">104 </span>
@@ -174,6 +175,42 @@ if ('onhashchange' in window) {
 <span id="L114" class="LineNr">114 </span><span class="traceContains">+run: storing 0x44</span>
 <span id="L115" class="LineNr">115 </span><span class="Comment"># ensure ESI is unchanged</span>
 <span id="L116" class="LineNr">116 </span><span class="Special">% CHECK_EQ(Reg[ESI].u, 0xaabbccdd);</span>
+<span id="L117" class="LineNr">117 </span>
+<span id="L118" class="LineNr">118 </span><span class="Comment">//:</span>
+<span id="L119" class="LineNr">119 </span>
+<span id="L120" class="LineNr">120 </span><span class="Delimiter">:(before &quot;End Initialize Op Names&quot;)</span>
+<span id="L121" class="LineNr">121 </span><a href='001help.cc.html#L262'>put_new</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L378'>Name</a></span><span class="Delimiter">,</span> <span class="Constant">&quot;c6&quot;</span><span class="Delimiter">,</span> <span class="Constant">&quot;copy imm8 to r8/m8-at-r32 (mov)&quot;</span><span class="Delimiter">);</span>
+<span id="L122" class="LineNr">122 </span>
+<span id="L123" class="LineNr">123 </span><span class="Delimiter">:(scenario copy_imm8_to_mem_at_r32)</span>
+<span id="L124" class="LineNr">124 </span><span class="Special">% Reg[EAX].i = 0x2000;</span>
+<span id="L125" class="LineNr">125 </span>== <span class="Constant">0x1</span>
+<span id="L126" class="LineNr">126 </span><span class="Comment"># op  ModR/M  SIB   displacement  immediate</span>
+<span id="L127" class="LineNr">127 </span>  c6  <span class="PreProc">0</span><span class="Constant">0</span>                          dd          <span class="Comment"># copy to the byte at *EAX</span>
+<span id="L128" class="LineNr">128 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 000 (unused) 000 (dest EAX)</span>
+<span id="L129" class="LineNr">129 </span>== <span class="Constant">0x2000</span>
+<span id="L130" class="LineNr">130 </span>f0 cc bb aa
+<span id="L131" class="LineNr">131 </span><span class="traceContains">+run: copy imm8 to r8/m8-at-r32</span>
+<span id="L132" class="LineNr">132 </span><span class="traceContains">+run: effective address is 0x00002000 (EAX)</span>
+<span id="L133" class="LineNr">133 </span><span class="traceContains">+run: storing 0xdd</span>
+<span id="L134" class="LineNr">134 </span><span class="Special">% CHECK_EQ(0xaabbccdd, read_mem_u32(0x2000));</span>
+<span id="L135" class="LineNr">135 </span>
+<span id="L136" class="LineNr">136 </span><span class="Delimiter">:(before &quot;End Single-Byte Opcodes&quot;)</span>
+<span id="L137" class="LineNr">137 </span><span class="Normal">case</span> <span class="Constant">0xc6</span>: <span class="Delimiter">{</span>  <span class="Comment">// copy imm8 to r/m8</span>
+<span id="L138" class="LineNr">138 </span>  <span class="Normal">const</span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">();</span>
+<span id="L139" class="LineNr">139 </span>  <span class="Normal">const</span> <span class="Normal">uint8_t</span> src = <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">();</span>
+<span id="L140" class="LineNr">140 </span>  <a href='003trace.cc.html#L183'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;copy imm8 to r8/m8-at-r32&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<span id="L141" class="LineNr">141 </span>  <a href='003trace.cc.html#L183'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;imm8 is 0x&quot;</span> &lt;&lt; <a href='010---vm.cc.html#L413'>HEXWORD</a> &lt;&lt; src &lt;&lt; end<span class="Delimiter">();</span>
+<span id="L142" class="LineNr">142 </span>  <span class="Normal">const</span> <span class="Normal">uint8_t</span> subop = <span class="Delimiter">(</span>modrm&gt;&gt;<span class="Constant">3</span><span class="Delimiter">)</span>&amp;<span class="Constant">0x7</span><span class="Delimiter">;</span>  <span class="Comment">// middle 3 'reg opcode' bits</span>
+<span id="L143" class="LineNr">143 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>subop != <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<span id="L144" class="LineNr">144 </span>    cerr &lt;&lt; <span class="Constant">&quot;unrecognized subop for opcode c6: &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>subop<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; (only 0/copy currently implemented)\n&quot;</span><span class="Delimiter">;</span>
+<span id="L145" class="LineNr">145 </span>    exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
+<span id="L146" class="LineNr">146 </span>  <span class="Delimiter">}</span>
+<span id="L147" class="LineNr">147 </span>  <span class="Comment">// use unsigned to zero-extend 8-bit value to 32 bits</span>
+<span id="L148" class="LineNr">148 </span>  <span class="Normal">uint8_t</span>* dest = <span class="Normal">reinterpret_cast</span>&lt;<span class="Normal">uint8_t</span>*&gt;<span class="Delimiter">(</span><a href='021byte_addressing.cc.html#L21'>effective_byte_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">));</span>
+<span id="L149" class="LineNr">149 </span>  *dest = src<span class="Delimiter">;</span>
+<span id="L150" class="LineNr">150 </span>  <a href='003trace.cc.html#L183'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;storing 0x&quot;</span> &lt;&lt; <a href='010---vm.cc.html#L412'>HEXBYTE</a> &lt;&lt; <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>*dest<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
+<span id="L151" class="LineNr">151 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
+<span id="L152" class="LineNr">152 </span><span class="Delimiter">}</span>
 </pre>
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