diff options
Diffstat (limited to 'html/subx/021byte_addressing.cc.html')
| -rw-r--r-- | html/subx/021byte_addressing.cc.html | 41 |
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">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"storing 0x"</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>*src<span class="Delimiter">)</span> << 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 & <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">"run"</span><span class="Delimiter">)</span> << <a href='013direct_addressing.cc.html#L62'>rname</a><span class="Delimiter">(</span>rdest_32bit<span class="Delimiter">)</span> << <span class="Constant">" now contains 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[rdest_32bit]<span class="Delimiter">.</span>u << 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">"run"</span><span class="Delimiter">)</span> << <a href='013direct_addressing.cc.html#L63'>rname</a><span class="Delimiter">(</span>rdest_32bit<span class="Delimiter">)</span> << <span class="Constant">" now contains 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[rdest_32bit]<span class="Delimiter">.</span>u << 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 "End Initialize Op Names")</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">"c6"</span><span class="Delimiter">,</span> <span class="Constant">"copy imm8 to r8/m8-at-r32 (mov)"</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 "End Single-Byte Opcodes")</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">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"copy imm8 to r8/m8-at-r32"</span> << 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">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"imm8 is 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << src << 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>><span class="Constant">3</span><span class="Delimiter">)</span>&<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 << <span class="Constant">"unrecognized subop for opcode c6: "</span> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>subop<span class="Delimiter">)</span> << <span class="Constant">" (only 0/copy currently implemented)\n"</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><<span class="Normal">uint8_t</span>*><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">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"storing 0x"</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>*dest<span class="Delimiter">)</span> << 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> </body> </html> |