diff options
| author | Kartik Agaram <vc@akkartik.com> | 2018-09-07 22:42:23 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-09-07 22:42:23 -0700 |
| commit | c762564bd754884e847922c99172076fde4d646e (patch) | |
| tree | 52b51d72a8e0bf29c94f5c01c13f098399830082 /html/subx/014indirect_addressing.cc.html | |
| parent | 1a62e61df42bfdf001010700c1e1042c67d62ec2 (diff) | |
| download | mu-c762564bd754884e847922c99172076fde4d646e.tar.gz | |
4539
Diffstat (limited to 'html/subx/014indirect_addressing.cc.html')
| -rw-r--r-- | html/subx/014indirect_addressing.cc.html | 827 |
1 files changed, 414 insertions, 413 deletions
diff --git a/html/subx/014indirect_addressing.cc.html b/html/subx/014indirect_addressing.cc.html index 79362ee9..3f08e713 100644 --- a/html/subx/014indirect_addressing.cc.html +++ b/html/subx/014indirect_addressing.cc.html @@ -291,425 +291,426 @@ if ('onhashchange' in window) { <span id="L227" class="LineNr">227 </span> <span id="L228" class="LineNr">228 </span><span class="SalientComment">//:: not</span> <span id="L229" class="LineNr">229 </span> -<span id="L230" class="LineNr">230 </span><span class="Delimiter">:(scenario not_r32_with_mem_at_r32)</span> +<span id="L230" class="LineNr">230 </span><span class="Delimiter">:(scenario not_of_mem_at_r32)</span> <span id="L231" class="LineNr">231 </span><span class="Special">% Reg[EBX].i = 0x60;</span> <span id="L232" class="LineNr">232 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> <span id="L233" class="LineNr">233 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L234" class="LineNr">234 </span> f7 <span class="PreProc">0</span><span class="Constant">3</span> <span class="Comment"># negate *EBX</span> -<span id="L235" class="LineNr">235 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 000 (unused) 011 (dest EBX)</span> +<span id="L234" class="LineNr">234 </span> f7 <span class="Constant">13</span> <span class="Comment"># negate *EBX</span> +<span id="L235" class="LineNr">235 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 010 (subop not) 011 (dest EBX)</span> <span id="L236" class="LineNr">236 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> <span id="L237" class="LineNr">237 </span>ff <span class="PreProc">0</span><span class="Constant">0</span> <span class="Constant">0f</span> <span class="Constant">0f</span> <span class="Comment"># 0x0f0f00ff</span> -<span id="L238" class="LineNr">238 </span><span class="traceContains">+run: 'not' of r/m32</span> +<span id="L238" class="LineNr">238 </span><span class="traceContains">+run: operate on r/m32</span> <span id="L239" class="LineNr">239 </span><span class="traceContains">+run: effective address is 0x60 (EBX)</span> -<span id="L240" class="LineNr">240 </span><span class="traceContains">+run: storing 0xf0f0ff00</span> -<span id="L241" class="LineNr">241 </span> -<span id="L242" class="LineNr">242 </span><span class="SalientComment">//:: compare (cmp)</span> -<span id="L243" class="LineNr">243 </span> -<span id="L244" class="LineNr">244 </span><span class="Delimiter">:(scenario compare_mem_at_r32_with_r32_greater)</span> -<span id="L245" class="LineNr">245 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L246" class="LineNr">246 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c07;</span> -<span id="L247" class="LineNr">247 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L248" class="LineNr">248 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L249" class="LineNr">249 </span> <span class="Constant">39</span> <span class="Constant">18</span> <span class="Comment"># compare EBX with *EAX</span> -<span id="L250" class="LineNr">250 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> -<span id="L251" class="LineNr">251 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L252" class="LineNr">252 </span>0d 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> -<span id="L253" class="LineNr">253 </span><span class="traceContains">+run: compare <a href='010---vm.cc.html#L16'>EBX</a> with r/m32</span> -<span id="L254" class="LineNr">254 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L255" class="LineNr">255 </span><span class="traceContains">+run: SF=0; ZF=0; OF=0</span> -<span id="L256" class="LineNr">256 </span> -<span id="L257" class="LineNr">257 </span><span class="Delimiter">:(scenario compare_mem_at_r32_with_r32_lesser)</span> -<span id="L258" class="LineNr">258 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L259" class="LineNr">259 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c0d;</span> -<span id="L260" class="LineNr">260 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L261" class="LineNr">261 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L262" class="LineNr">262 </span> <span class="Constant">39</span> <span class="Constant">18</span> <span class="Comment"># compare EBX with *EAX</span> -<span id="L263" class="LineNr">263 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> -<span id="L264" class="LineNr">264 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L265" class="LineNr">265 </span><span class="PreProc">0</span><span class="Constant">7</span> 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> -<span id="L266" class="LineNr">266 </span><span class="traceContains">+run: compare <a href='010---vm.cc.html#L16'>EBX</a> with r/m32</span> -<span id="L267" class="LineNr">267 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L268" class="LineNr">268 </span><span class="traceContains">+run: SF=1; ZF=0; OF=0</span> -<span id="L269" class="LineNr">269 </span> -<span id="L270" class="LineNr">270 </span><span class="Delimiter">:(scenario compare_mem_at_r32_with_r32_equal)</span> -<span id="L271" class="LineNr">271 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L272" class="LineNr">272 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c0d;</span> -<span id="L273" class="LineNr">273 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L274" class="LineNr">274 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L275" class="LineNr">275 </span> <span class="Constant">39</span> <span class="Constant">18</span> <span class="Comment"># compare EBX with *EAX</span> -<span id="L276" class="LineNr">276 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> -<span id="L277" class="LineNr">277 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L278" class="LineNr">278 </span>0d 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> -<span id="L279" class="LineNr">279 </span><span class="traceContains">+run: compare <a href='010---vm.cc.html#L16'>EBX</a> with r/m32</span> -<span id="L280" class="LineNr">280 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L281" class="LineNr">281 </span><span class="traceContains">+run: SF=0; ZF=1; OF=0</span> -<span id="L282" class="LineNr">282 </span> -<span id="L283" class="LineNr">283 </span><span class="Comment">//:</span> -<span id="L284" class="LineNr">284 </span> -<span id="L285" class="LineNr">285 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> -<span id="L286" class="LineNr">286 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"3b"</span><span class="Delimiter">,</span> <span class="Constant">"set SF if rm32 > r32"</span><span class="Delimiter">);</span> -<span id="L287" class="LineNr">287 </span> -<span id="L288" class="LineNr">288 </span><span class="Delimiter">:(scenario compare_r32_with_mem_at_r32_greater)</span> -<span id="L289" class="LineNr">289 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L290" class="LineNr">290 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c0d;</span> -<span id="L291" class="LineNr">291 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L292" class="LineNr">292 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L293" class="LineNr">293 </span> 3b <span class="Constant">18</span> <span class="Comment"># compare *EAX with EBX</span> -<span id="L294" class="LineNr">294 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> -<span id="L295" class="LineNr">295 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L296" class="LineNr">296 </span><span class="PreProc">0</span><span class="Constant">7</span> 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> -<span id="L297" class="LineNr">297 </span><span class="traceContains">+run: compare r/m32 with <a href='010---vm.cc.html#L16'>EBX</a></span> -<span id="L298" class="LineNr">298 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L299" class="LineNr">299 </span><span class="traceContains">+run: SF=0; ZF=0; OF=0</span> -<span id="L300" class="LineNr">300 </span> -<span id="L301" class="LineNr">301 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L302" class="LineNr">302 </span><span class="Normal">case</span> <span class="Constant">0x3b</span>: <span class="Delimiter">{</span> <span class="Comment">// set SF if r32 < r/m32</span> -<span id="L303" class="LineNr">303 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> -<span id="L304" class="LineNr">304 </span> <span class="Normal">uint8_t</span> reg1 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> -<span id="L305" class="LineNr">305 </span> <a href='003trace.cc.html#L196'>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">"compare r/m32 with "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L306" class="LineNr">306 </span> <span class="Normal">int32_t</span> arg1 = Reg[reg1]<span class="Delimiter">.</span>i<span class="Delimiter">;</span> -<span id="L307" class="LineNr">307 </span> <span class="Normal">int32_t</span>* arg2 = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> -<span id="L308" class="LineNr">308 </span> <span class="Normal">int32_t</span> tmp1 = arg1 - *arg2<span class="Delimiter">;</span> -<span id="L309" class="LineNr">309 </span> SF = <span class="Delimiter">(</span>tmp1 < <span class="Constant">0</span><span class="Delimiter">);</span> -<span id="L310" class="LineNr">310 </span> ZF = <span class="Delimiter">(</span>tmp1 == <span class="Constant">0</span><span class="Delimiter">);</span> -<span id="L311" class="LineNr">311 </span> <span class="Normal">int64_t</span> tmp2 = arg1 - *arg2<span class="Delimiter">;</span> -<span id="L312" class="LineNr">312 </span> <a href='010---vm.cc.html#L59'>OF</a> = <span class="Delimiter">(</span>tmp1 != tmp2<span class="Delimiter">);</span> -<span id="L313" class="LineNr">313 </span> <a href='003trace.cc.html#L196'>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">"SF="</span> << SF << <span class="Constant">"; ZF="</span> << ZF << <span class="Constant">"; OF="</span> << <a href='010---vm.cc.html#L59'>OF</a> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L314" class="LineNr">314 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L315" class="LineNr">315 </span><span class="Delimiter">}</span> -<span id="L316" class="LineNr">316 </span> -<span id="L317" class="LineNr">317 </span><span class="Delimiter">:(scenario compare_r32_with_mem_at_r32_lesser)</span> -<span id="L318" class="LineNr">318 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L319" class="LineNr">319 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c07;</span> -<span id="L320" class="LineNr">320 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L321" class="LineNr">321 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L322" class="LineNr">322 </span> 3b <span class="Constant">18</span> <span class="Comment"># compare *EAX with EBX</span> -<span id="L323" class="LineNr">323 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> -<span id="L324" class="LineNr">324 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L325" class="LineNr">325 </span>0d 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> -<span id="L326" class="LineNr">326 </span><span class="traceContains">+run: compare r/m32 with <a href='010---vm.cc.html#L16'>EBX</a></span> -<span id="L327" class="LineNr">327 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L328" class="LineNr">328 </span><span class="traceContains">+run: SF=1; ZF=0; OF=0</span> -<span id="L329" class="LineNr">329 </span> -<span id="L330" class="LineNr">330 </span><span class="Delimiter">:(scenario compare_r32_with_mem_at_r32_equal)</span> -<span id="L331" class="LineNr">331 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L332" class="LineNr">332 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c0d;</span> -<span id="L333" class="LineNr">333 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L334" class="LineNr">334 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L335" class="LineNr">335 </span> 3b <span class="Constant">18</span> <span class="Comment"># compare *EAX with EBX</span> -<span id="L336" class="LineNr">336 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> -<span id="L337" class="LineNr">337 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L338" class="LineNr">338 </span>0d 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> -<span id="L339" class="LineNr">339 </span><span class="traceContains">+run: compare r/m32 with <a href='010---vm.cc.html#L16'>EBX</a></span> -<span id="L340" class="LineNr">340 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L341" class="LineNr">341 </span><span class="traceContains">+run: SF=0; ZF=1; OF=0</span> -<span id="L342" class="LineNr">342 </span> -<span id="L343" class="LineNr">343 </span><span class="SalientComment">//:: copy (mov)</span> -<span id="L344" class="LineNr">344 </span> -<span id="L345" class="LineNr">345 </span><span class="Delimiter">:(scenario copy_r32_to_mem_at_r32)</span> -<span id="L346" class="LineNr">346 </span><span class="Special">% Reg[EBX].i = 0xaf;</span> -<span id="L347" class="LineNr">347 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L348" class="LineNr">348 </span>== <span class="Constant">0x1</span> -<span id="L349" class="LineNr">349 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L350" class="LineNr">350 </span> <span class="Constant">89</span> <span class="Constant">18</span> <span class="Comment"># copy EBX to *EAX</span> -<span id="L351" class="LineNr">351 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> -<span id="L352" class="LineNr">352 </span><span class="traceContains">+run: copy <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L353" class="LineNr">353 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L354" class="LineNr">354 </span><span class="traceContains">+run: storing 0x000000af</span> -<span id="L355" class="LineNr">355 </span> -<span id="L356" class="LineNr">356 </span><span class="Comment">//:</span> -<span id="L357" class="LineNr">357 </span> -<span id="L358" class="LineNr">358 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> -<span id="L359" class="LineNr">359 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8b"</span><span class="Delimiter">,</span> <span class="Constant">"copy rm32 to r32"</span><span class="Delimiter">);</span> -<span id="L360" class="LineNr">360 </span> -<span id="L361" class="LineNr">361 </span><span class="Delimiter">:(scenario copy_mem_at_r32_to_r32)</span> -<span id="L362" class="LineNr">362 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L363" class="LineNr">363 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L364" class="LineNr">364 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L365" class="LineNr">365 </span> 8b <span class="Constant">18</span> <span class="Comment"># copy *EAX to EBX</span> -<span id="L366" class="LineNr">366 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L367" class="LineNr">367 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L368" class="LineNr">368 </span>af <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 0xaf</span> -<span id="L369" class="LineNr">369 </span><span class="traceContains">+run: copy r/m32 to <a href='010---vm.cc.html#L16'>EBX</a></span> -<span id="L370" class="LineNr">370 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L371" class="LineNr">371 </span><span class="traceContains">+run: storing 0x000000af</span> -<span id="L372" class="LineNr">372 </span> -<span id="L373" class="LineNr">373 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L374" class="LineNr">374 </span><span class="Normal">case</span> <span class="Constant">0x8b</span>: <span class="Delimiter">{</span> <span class="Comment">// copy r32 to r/m32</span> -<span id="L375" class="LineNr">375 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> -<span id="L376" class="LineNr">376 </span> <span class="Normal">uint8_t</span> reg1 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> -<span id="L377" class="LineNr">377 </span> <a href='003trace.cc.html#L196'>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 r/m32 to "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L378" class="LineNr">378 </span> <span class="Normal">int32_t</span>* arg2 = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> -<span id="L379" class="LineNr">379 </span> Reg[reg1]<span class="Delimiter">.</span>i = *arg2<span class="Delimiter">;</span> -<span id="L380" class="LineNr">380 </span> <a href='003trace.cc.html#L196'>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#L260'>HEXWORD</a> << *arg2 << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L381" class="LineNr">381 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L382" class="LineNr">382 </span><span class="Delimiter">}</span> -<span id="L383" class="LineNr">383 </span> -<span id="L384" class="LineNr">384 </span><span class="Comment">//:</span> -<span id="L385" class="LineNr">385 </span> -<span id="L386" class="LineNr">386 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> -<span id="L387" class="LineNr">387 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"88"</span><span class="Delimiter">,</span> <span class="Constant">"copy r8 (lowermost byte of r32) to r8/m8-at-r32"</span><span class="Delimiter">);</span> -<span id="L388" class="LineNr">388 </span> -<span id="L389" class="LineNr">389 </span><span class="Delimiter">:(scenario copy_r8_to_mem_at_r32)</span> -<span id="L390" class="LineNr">390 </span><span class="Special">% Reg[EBX].i = 0xafafafaf;</span> -<span id="L391" class="LineNr">391 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L392" class="LineNr">392 </span>== <span class="Constant">0x1</span> -<span id="L393" class="LineNr">393 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L394" class="LineNr">394 </span> <span class="Constant">88</span> <span class="Constant">18</span> <span class="Comment"># copy just the lowermost byte of EBX to the byte at *EAX</span> -<span id="L395" class="LineNr">395 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L396" class="LineNr">396 </span><span class="traceContains">+run: copy lowermost byte of <a href='010---vm.cc.html#L16'>EBX</a> to r8/m8-at-r32</span> -<span id="L397" class="LineNr">397 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L398" class="LineNr">398 </span><span class="traceContains">+run: storing 0xaf</span> -<span id="L399" class="LineNr">399 </span><span class="Special">% CHECK_EQ(0x000000af, read_mem_u32(0x60));</span> -<span id="L400" class="LineNr">400 </span> -<span id="L401" class="LineNr">401 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L402" class="LineNr">402 </span><span class="Normal">case</span> <span class="Constant">0x88</span>: <span class="Delimiter">{</span> <span class="Comment">// copy r/m8 to r8</span> -<span id="L403" class="LineNr">403 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> -<span id="L404" class="LineNr">404 </span> <span class="Normal">uint8_t</span> reg2 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> -<span id="L405" class="LineNr">405 </span> <a href='003trace.cc.html#L196'>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 lowermost byte of "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg2<span class="Delimiter">)</span> << <span class="Constant">" to r8/m8-at-r32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L406" class="LineNr">406 </span> <span class="Comment">// use unsigned to zero-extend 8-bit value to 32 bits</span> -<span id="L407" class="LineNr">407 </span> <span class="Normal">uint8_t</span>* arg1 = <span class="Normal">reinterpret_cast</span><<span class="Normal">uint8_t</span>*><span class="Delimiter">(</span><a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">));</span> -<span id="L408" class="LineNr">408 </span> *arg1 = Reg[reg2]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> -<span id="L409" class="LineNr">409 </span> <a href='003trace.cc.html#L196'>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#L259'>HEXBYTE</a> << <a href='010---vm.cc.html#L262'>NUM</a><span class="Delimiter">(</span>*arg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L410" class="LineNr">410 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L411" class="LineNr">411 </span><span class="Delimiter">}</span> -<span id="L412" class="LineNr">412 </span> -<span id="L413" class="LineNr">413 </span><span class="Comment">//:</span> -<span id="L414" class="LineNr">414 </span> -<span id="L415" class="LineNr">415 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> -<span id="L416" class="LineNr">416 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8a"</span><span class="Delimiter">,</span> <span class="Constant">"copy r8/m8-at-r32 to r8 (lowermost byte of r32)"</span><span class="Delimiter">);</span> -<span id="L417" class="LineNr">417 </span> -<span id="L418" class="LineNr">418 </span><span class="Delimiter">:(scenario copy_mem_at_r32_to_r8)</span> -<span id="L419" class="LineNr">419 </span><span class="Special">% Reg[EBX].i = 0xaf;</span> -<span id="L420" class="LineNr">420 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L421" class="LineNr">421 </span>== <span class="Constant">0x1</span> -<span id="L422" class="LineNr">422 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L423" class="LineNr">423 </span> 8a <span class="Constant">18</span> <span class="Comment"># copy just the byte at *EAX to lowermost byte of EBX (clearing remaining bytes)</span> -<span id="L424" class="LineNr">424 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (dest EBX) 000 (src EAX)</span> -<span id="L425" class="LineNr">425 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L426" class="LineNr">426 </span>af ff ff ff <span class="Comment"># 0xaf with more data in following bytes</span> -<span id="L427" class="LineNr">427 </span><span class="traceContains">+run: copy r8/m8-at-r32 to lowermost byte of <a href='010---vm.cc.html#L16'>EBX</a></span> -<span id="L428" class="LineNr">428 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L429" class="LineNr">429 </span><span class="traceContains">+run: storing 0xaf</span> -<span id="L430" class="LineNr">430 </span> -<span id="L431" class="LineNr">431 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L432" class="LineNr">432 </span><span class="Normal">case</span> <span class="Constant">0x8a</span>: <span class="Delimiter">{</span> <span class="Comment">// copy r/m8 to r8</span> -<span id="L433" class="LineNr">433 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> -<span id="L434" class="LineNr">434 </span> <span class="Normal">uint8_t</span> reg1 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> -<span id="L435" class="LineNr">435 </span> <a href='003trace.cc.html#L196'>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 r8/m8-at-r32 to lowermost byte of "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L436" class="LineNr">436 </span> <span class="Comment">// use unsigned to zero-extend 8-bit value to 32 bits</span> -<span id="L437" class="LineNr">437 </span> <span class="Normal">uint8_t</span>* arg2 = <span class="Normal">reinterpret_cast</span><<span class="Normal">uint8_t</span>*><span class="Delimiter">(</span><a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">));</span> -<span id="L438" class="LineNr">438 </span> Reg[reg1]<span class="Delimiter">.</span>u = <span class="Normal">static_cast</span><<span class="Normal">uint32_t</span>><span class="Delimiter">(</span>*arg2<span class="Delimiter">);</span> -<span id="L439" class="LineNr">439 </span> <a href='003trace.cc.html#L196'>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#L259'>HEXBYTE</a> << <a href='010---vm.cc.html#L262'>NUM</a><span class="Delimiter">(</span>*arg2<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L440" class="LineNr">440 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L441" class="LineNr">441 </span><span class="Delimiter">}</span> -<span id="L442" class="LineNr">442 </span> -<span id="L443" class="LineNr">443 </span><span class="SalientComment">//:: jump</span> -<span id="L444" class="LineNr">444 </span> -<span id="L445" class="LineNr">445 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> -<span id="L446" class="LineNr">446 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"ff"</span><span class="Delimiter">,</span> <span class="Constant">"jump/push/call rm32 based on subop"</span><span class="Delimiter">);</span> -<span id="L447" class="LineNr">447 </span> -<span id="L448" class="LineNr">448 </span><span class="Delimiter">:(scenario jump_mem_at_r32)</span> -<span id="L449" class="LineNr">449 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L450" class="LineNr">450 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L451" class="LineNr">451 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L452" class="LineNr">452 </span> ff <span class="Constant">20</span> <span class="Comment"># jump to *EAX</span> -<span id="L453" class="LineNr">453 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 100 (jump to r/m32) 000 (src EAX)</span> -<span id="L454" class="LineNr">454 </span> <span class="PreProc">0</span><span class="Constant">5</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">1</span> -<span id="L455" class="LineNr">455 </span> <span class="PreProc">0</span><span class="Constant">5</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">2</span> -<span id="L456" class="LineNr">456 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L457" class="LineNr">457 </span><span class="Error">08</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 8</span> -<span id="L458" class="LineNr">458 </span><span class="traceContains">+run: inst: 0x00000001</span> -<span id="L459" class="LineNr">459 </span><span class="traceContains">+run: jump to r/m32</span> -<span id="L460" class="LineNr">460 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L461" class="LineNr">461 </span><span class="traceContains">+run: jumping to 0x00000008</span> -<span id="L462" class="LineNr">462 </span><span class="traceContains">+run: inst: 0x00000008</span> -<span id="L463" class="LineNr">463 </span><span class="traceAbsent">-run: inst: 0x00000003</span> -<span id="L464" class="LineNr">464 </span> -<span id="L465" class="LineNr">465 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L466" class="LineNr">466 </span><span class="Normal">case</span> <span class="Constant">0xff</span>: <span class="Delimiter">{</span> -<span id="L467" class="LineNr">467 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> -<span id="L468" class="LineNr">468 </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="L469" class="LineNr">469 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>subop<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L470" class="LineNr">470 </span> <span class="Normal">case</span> <span class="Constant">4</span>: <span class="Delimiter">{</span> <span class="Comment">// jump to r/m32</span> -<span id="L471" class="LineNr">471 </span> <a href='003trace.cc.html#L196'>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">"jump to r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L472" class="LineNr">472 </span> <span class="Normal">int32_t</span>* arg2 = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> -<span id="L473" class="LineNr">473 </span> <a href='010---vm.cc.html#L29'>EIP</a> = *arg2<span class="Delimiter">;</span> -<span id="L474" class="LineNr">474 </span> <a href='003trace.cc.html#L196'>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">"jumping to 0x"</span> << <a href='010---vm.cc.html#L260'>HEXWORD</a> << <a href='010---vm.cc.html#L29'>EIP</a> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L475" class="LineNr">475 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L476" class="LineNr">476 </span> <span class="Delimiter">}</span> -<span id="L477" class="LineNr">477 </span> <span class="Comment">// End Op ff Subops</span> -<span id="L478" class="LineNr">478 </span> <span class="Delimiter">}</span> -<span id="L479" class="LineNr">479 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L480" class="LineNr">480 </span><span class="Delimiter">}</span> -<span id="L481" class="LineNr">481 </span> -<span id="L482" class="LineNr">482 </span><span class="SalientComment">//:: push</span> -<span id="L483" class="LineNr">483 </span> -<span id="L484" class="LineNr">484 </span><span class="Delimiter">:(scenario push_mem_at_r32)</span> -<span id="L485" class="LineNr">485 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L486" class="LineNr">486 </span><span class="Special">% Reg[ESP].u = 0x14;</span> -<span id="L487" class="LineNr">487 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L488" class="LineNr">488 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L489" class="LineNr">489 </span> ff <span class="Constant">30</span> <span class="Comment"># push *EAX to stack</span> -<span id="L490" class="LineNr">490 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 110 (push r/m32) 000 (src EAX)</span> -<span id="L491" class="LineNr">491 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L492" class="LineNr">492 </span>af <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 0xaf</span> -<span id="L493" class="LineNr">493 </span><span class="traceContains">+run: <a href='012elf.cc.html#L85'>push</a> r/m32</span> -<span id="L494" class="LineNr">494 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L495" class="LineNr">495 </span><span class="traceContains">+run: decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000010</span> -<span id="L496" class="LineNr">496 </span><span class="traceContains">+run: pushing value 0x000000af</span> -<span id="L497" class="LineNr">497 </span> -<span id="L498" class="LineNr">498 </span><span class="Delimiter">:(before "End Op ff Subops")</span> -<span id="L499" class="LineNr">499 </span><span class="Normal">case</span> <span class="Constant">6</span>: <span class="Delimiter">{</span> <span class="Comment">// push r/m32 to stack</span> -<span id="L500" class="LineNr">500 </span> <a href='003trace.cc.html#L196'>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">"push r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L501" class="LineNr">501 </span> <span class="Normal">const</span> <span class="Normal">int32_t</span>* val = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> -<span id="L502" class="LineNr">502 </span> <a href='012elf.cc.html#L85'>push</a><span class="Delimiter">(</span>*val<span class="Delimiter">);</span> -<span id="L503" class="LineNr">503 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L504" class="LineNr">504 </span><span class="Delimiter">}</span> -<span id="L505" class="LineNr">505 </span> -<span id="L506" class="LineNr">506 </span><span class="SalientComment">//:: pop</span> -<span id="L507" class="LineNr">507 </span> -<span id="L508" class="LineNr">508 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> -<span id="L509" class="LineNr">509 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8f"</span><span class="Delimiter">,</span> <span class="Constant">"pop top of stack to rm32"</span><span class="Delimiter">);</span> -<span id="L510" class="LineNr">510 </span> -<span id="L511" class="LineNr">511 </span><span class="Delimiter">:(scenario pop_mem_at_r32)</span> -<span id="L512" class="LineNr">512 </span><span class="Special">% Reg[EAX].i = 0x60;</span> -<span id="L513" class="LineNr">513 </span><span class="Special">% Reg[ESP].u = 0x10;</span> -<span id="L514" class="LineNr">514 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L515" class="LineNr">515 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L516" class="LineNr">516 </span> <span class="Constant">8f</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># pop stack into *EAX</span> -<span id="L517" class="LineNr">517 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 000 (pop r/m32) 000 (dest EAX)</span> -<span id="L518" class="LineNr">518 </span>== <span class="Constant">0x10</span> <span class="Comment"># data segment</span> -<span id="L519" class="LineNr">519 </span><span class="Constant">30</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 0x30</span> -<span id="L520" class="LineNr">520 </span><span class="traceContains">+run: <a href='013direct_addressing.cc.html#L412'>pop</a> into r/m32</span> -<span id="L521" class="LineNr">521 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> -<span id="L522" class="LineNr">522 </span><span class="traceContains">+run: popping value 0x00000030</span> -<span id="L523" class="LineNr">523 </span><span class="traceContains">+run: incrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000014</span> -<span id="L524" class="LineNr">524 </span> -<span id="L525" class="LineNr">525 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> -<span id="L526" class="LineNr">526 </span><span class="Normal">case</span> <span class="Constant">0x8f</span>: <span class="Delimiter">{</span> <span class="Comment">// pop stack into r/m32</span> -<span id="L527" class="LineNr">527 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> -<span id="L528" class="LineNr">528 </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 id="L529" class="LineNr">529 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>subop<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L530" class="LineNr">530 </span> <span class="Normal">case</span> <span class="Constant">0</span>: <span class="Delimiter">{</span> -<span id="L531" class="LineNr">531 </span> <a href='003trace.cc.html#L196'>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">"pop into r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L532" class="LineNr">532 </span> <span class="Normal">int32_t</span>* dest = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> -<span id="L533" class="LineNr">533 </span> *dest = <a href='013direct_addressing.cc.html#L412'>pop</a><span class="Delimiter">();</span> -<span id="L534" class="LineNr">534 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L535" class="LineNr">535 </span> <span class="Delimiter">}</span> -<span id="L536" class="LineNr">536 </span> <span class="Delimiter">}</span> -<span id="L537" class="LineNr">537 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L538" class="LineNr">538 </span><span class="Delimiter">}</span> -<span id="L539" class="LineNr">539 </span> -<span id="L540" class="LineNr">540 </span><span class="SalientComment">//:: special-case for loading address from disp32 rather than register</span> -<span id="L541" class="LineNr">541 </span> -<span id="L542" class="LineNr">542 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_displacement)</span> -<span id="L543" class="LineNr">543 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L544" class="LineNr">544 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L545" class="LineNr">545 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L546" class="LineNr">546 </span> <span class="PreProc">0</span><span class="Constant">1</span> 1d <span class="Constant">60</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># add EBX to *0x60</span> -<span id="L547" class="LineNr">547 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 101 (dest in disp32)</span> -<span id="L548" class="LineNr">548 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L549" class="LineNr">549 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> -<span id="L550" class="LineNr">550 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L551" class="LineNr">551 </span><span class="traceContains">+run: effective address is 0x60 (disp32)</span> -<span id="L552" class="LineNr">552 </span><span class="traceContains">+run: storing 0x00000011</span> -<span id="L553" class="LineNr">553 </span> -<span id="L554" class="LineNr">554 </span><span class="Delimiter">:(before "End Mod 0 Special-cases(addr)")</span> -<span id="L555" class="LineNr">555 </span><span class="Normal">case</span> <span class="Constant">5</span>: <span class="Comment">// exception: mod 0b00 rm 0b101 => incoming disp32</span> -<span id="L556" class="LineNr">556 </span> addr = <a href='011run.cc.html#L299'>imm32</a><span class="Delimiter">();</span> -<span id="L557" class="LineNr">557 </span> <a href='003trace.cc.html#L196'>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">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (disp32)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L558" class="LineNr">558 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L559" class="LineNr">559 </span> -<span id="L560" class="LineNr">560 </span><span class="Comment">//:</span> -<span id="L561" class="LineNr">561 </span> -<span id="L562" class="LineNr">562 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_disp8)</span> -<span id="L563" class="LineNr">563 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L564" class="LineNr">564 </span><span class="Special">% Reg[EAX].i = 0x5e; // dest</span> -<span id="L565" class="LineNr">565 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L566" class="LineNr">566 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L567" class="LineNr">567 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">58</span> <span class="PreProc">0</span><span class="Constant">2</span> <span class="Comment"># add EBX to *(EAX+2)</span> -<span id="L568" class="LineNr">568 </span><span class="Comment"># ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L569" class="LineNr">569 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L570" class="LineNr">570 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> -<span id="L571" class="LineNr">571 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L572" class="LineNr">572 </span><span class="traceContains">+run: effective address is initially 0x5e (EAX)</span> -<span id="L573" class="LineNr">573 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp8)</span> -<span id="L574" class="LineNr">574 </span><span class="traceContains">+run: storing 0x00000011</span> -<span id="L575" class="LineNr">575 </span> -<span id="L576" class="LineNr">576 </span><span class="Delimiter">:(before "End Mod Special-cases(addr)")</span> -<span id="L577" class="LineNr">577 </span><span class="Normal">case</span> <span class="Constant">1</span>: <span class="Comment">// indirect + disp8 addressing</span> -<span id="L578" class="LineNr">578 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>rm<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L579" class="LineNr">579 </span> <span class="Normal">default</span>: -<span id="L580" class="LineNr">580 </span> addr = Reg[rm]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> -<span id="L581" class="LineNr">581 </span> <a href='003trace.cc.html#L196'>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">"effective address is initially 0x"</span> << std::hex << addr << <span class="Constant">" ("</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>rm<span class="Delimiter">)</span> << <span class="Constant">")"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L582" class="LineNr">582 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L583" class="LineNr">583 </span> <span class="Comment">// End Mod 1 Special-cases(addr)</span> -<span id="L584" class="LineNr">584 </span> <span class="Delimiter">}</span> -<span id="L585" class="LineNr">585 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>addr > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L586" class="LineNr">586 </span> addr += <span class="Normal">static_cast</span><<span class="Normal">int8_t</span>><span class="Delimiter">(</span><a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">());</span> -<span id="L587" class="LineNr">587 </span> <a href='003trace.cc.html#L196'>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">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (after adding disp8)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L588" class="LineNr">588 </span> <span class="Delimiter">}</span> -<span id="L589" class="LineNr">589 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L590" class="LineNr">590 </span> -<span id="L591" class="LineNr">591 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_negative_disp8)</span> -<span id="L592" class="LineNr">592 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L593" class="LineNr">593 </span><span class="Special">% Reg[EAX].i = 0x61; // dest</span> -<span id="L594" class="LineNr">594 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L595" class="LineNr">595 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L596" class="LineNr">596 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">58</span> ff <span class="Comment"># add EBX to *(EAX-1)</span> -<span id="L597" class="LineNr">597 </span><span class="Comment"># ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L598" class="LineNr">598 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L599" class="LineNr">599 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> -<span id="L600" class="LineNr">600 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L601" class="LineNr">601 </span><span class="traceContains">+run: effective address is initially 0x61 (EAX)</span> -<span id="L602" class="LineNr">602 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp8)</span> -<span id="L603" class="LineNr">603 </span><span class="traceContains">+run: storing 0x00000011</span> -<span id="L604" class="LineNr">604 </span> -<span id="L605" class="LineNr">605 </span><span class="Comment">//:</span> -<span id="L606" class="LineNr">606 </span> -<span id="L607" class="LineNr">607 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_disp32)</span> -<span id="L608" class="LineNr">608 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L609" class="LineNr">609 </span><span class="Special">% Reg[EAX].i = 0x5e; // dest</span> -<span id="L610" class="LineNr">610 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L611" class="LineNr">611 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L612" class="LineNr">612 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">98</span> <span class="PreProc">0</span><span class="Constant">2</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># add EBX to *(EAX+2)</span> -<span id="L613" class="LineNr">613 </span><span class="Comment"># ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L614" class="LineNr">614 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L615" class="LineNr">615 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> -<span id="L616" class="LineNr">616 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L617" class="LineNr">617 </span><span class="traceContains">+run: effective address is initially 0x5e (EAX)</span> -<span id="L618" class="LineNr">618 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp32)</span> -<span id="L619" class="LineNr">619 </span><span class="traceContains">+run: storing 0x00000011</span> -<span id="L620" class="LineNr">620 </span> -<span id="L621" class="LineNr">621 </span><span class="Delimiter">:(before "End Mod Special-cases(addr)")</span> -<span id="L622" class="LineNr">622 </span><span class="Normal">case</span> <span class="Constant">2</span>: <span class="Comment">// indirect + disp32 addressing</span> -<span id="L623" class="LineNr">623 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>rm<span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L624" class="LineNr">624 </span> <span class="Normal">default</span>: -<span id="L625" class="LineNr">625 </span> addr = Reg[rm]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> -<span id="L626" class="LineNr">626 </span> <a href='003trace.cc.html#L196'>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">"effective address is initially 0x"</span> << std::hex << addr << <span class="Constant">" ("</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>rm<span class="Delimiter">)</span> << <span class="Constant">")"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L627" class="LineNr">627 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L628" class="LineNr">628 </span> <span class="Comment">// End Mod 2 Special-cases(addr)</span> -<span id="L629" class="LineNr">629 </span> <span class="Delimiter">}</span> -<span id="L630" class="LineNr">630 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>addr > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> -<span id="L631" class="LineNr">631 </span> addr += <a href='011run.cc.html#L299'>imm32</a><span class="Delimiter">();</span> -<span id="L632" class="LineNr">632 </span> <a href='003trace.cc.html#L196'>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">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (after adding disp32)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> -<span id="L633" class="LineNr">633 </span> <span class="Delimiter">}</span> -<span id="L634" class="LineNr">634 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> -<span id="L635" class="LineNr">635 </span> -<span id="L636" class="LineNr">636 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_negative_disp32)</span> -<span id="L637" class="LineNr">637 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> -<span id="L638" class="LineNr">638 </span><span class="Special">% Reg[EAX].i = 0x61; // dest</span> -<span id="L639" class="LineNr">639 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> -<span id="L640" class="LineNr">640 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> -<span id="L641" class="LineNr">641 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">98</span> ff ff ff ff <span class="Comment"># add EBX to *(EAX-1)</span> -<span id="L642" class="LineNr">642 </span><span class="Comment"># ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX)</span> -<span id="L643" class="LineNr">643 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> -<span id="L644" class="LineNr">644 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> -<span id="L645" class="LineNr">645 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> -<span id="L646" class="LineNr">646 </span><span class="traceContains">+run: effective address is initially 0x61 (EAX)</span> -<span id="L647" class="LineNr">647 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp32)</span> -<span id="L648" class="LineNr">648 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L240" class="LineNr">240 </span><span class="traceContains">+run: subop: not</span> +<span id="L241" class="LineNr">241 </span><span class="traceContains">+run: storing 0xf0f0ff00</span> +<span id="L242" class="LineNr">242 </span> +<span id="L243" class="LineNr">243 </span><span class="SalientComment">//:: compare (cmp)</span> +<span id="L244" class="LineNr">244 </span> +<span id="L245" class="LineNr">245 </span><span class="Delimiter">:(scenario compare_mem_at_r32_with_r32_greater)</span> +<span id="L246" class="LineNr">246 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L247" class="LineNr">247 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c07;</span> +<span id="L248" class="LineNr">248 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L249" class="LineNr">249 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L250" class="LineNr">250 </span> <span class="Constant">39</span> <span class="Constant">18</span> <span class="Comment"># compare EBX with *EAX</span> +<span id="L251" class="LineNr">251 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> +<span id="L252" class="LineNr">252 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L253" class="LineNr">253 </span>0d 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> +<span id="L254" class="LineNr">254 </span><span class="traceContains">+run: compare <a href='010---vm.cc.html#L16'>EBX</a> with r/m32</span> +<span id="L255" class="LineNr">255 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L256" class="LineNr">256 </span><span class="traceContains">+run: SF=0; ZF=0; OF=0</span> +<span id="L257" class="LineNr">257 </span> +<span id="L258" class="LineNr">258 </span><span class="Delimiter">:(scenario compare_mem_at_r32_with_r32_lesser)</span> +<span id="L259" class="LineNr">259 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L260" class="LineNr">260 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c0d;</span> +<span id="L261" class="LineNr">261 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L262" class="LineNr">262 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L263" class="LineNr">263 </span> <span class="Constant">39</span> <span class="Constant">18</span> <span class="Comment"># compare EBX with *EAX</span> +<span id="L264" class="LineNr">264 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> +<span id="L265" class="LineNr">265 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L266" class="LineNr">266 </span><span class="PreProc">0</span><span class="Constant">7</span> 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> +<span id="L267" class="LineNr">267 </span><span class="traceContains">+run: compare <a href='010---vm.cc.html#L16'>EBX</a> with r/m32</span> +<span id="L268" class="LineNr">268 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L269" class="LineNr">269 </span><span class="traceContains">+run: SF=1; ZF=0; OF=0</span> +<span id="L270" class="LineNr">270 </span> +<span id="L271" class="LineNr">271 </span><span class="Delimiter">:(scenario compare_mem_at_r32_with_r32_equal)</span> +<span id="L272" class="LineNr">272 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L273" class="LineNr">273 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c0d;</span> +<span id="L274" class="LineNr">274 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L275" class="LineNr">275 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L276" class="LineNr">276 </span> <span class="Constant">39</span> <span class="Constant">18</span> <span class="Comment"># compare EBX with *EAX</span> +<span id="L277" class="LineNr">277 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> +<span id="L278" class="LineNr">278 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L279" class="LineNr">279 </span>0d 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> +<span id="L280" class="LineNr">280 </span><span class="traceContains">+run: compare <a href='010---vm.cc.html#L16'>EBX</a> with r/m32</span> +<span id="L281" class="LineNr">281 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L282" class="LineNr">282 </span><span class="traceContains">+run: SF=0; ZF=1; OF=0</span> +<span id="L283" class="LineNr">283 </span> +<span id="L284" class="LineNr">284 </span><span class="Comment">//:</span> +<span id="L285" class="LineNr">285 </span> +<span id="L286" class="LineNr">286 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L287" class="LineNr">287 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"3b"</span><span class="Delimiter">,</span> <span class="Constant">"set SF if rm32 > r32"</span><span class="Delimiter">);</span> +<span id="L288" class="LineNr">288 </span> +<span id="L289" class="LineNr">289 </span><span class="Delimiter">:(scenario compare_r32_with_mem_at_r32_greater)</span> +<span id="L290" class="LineNr">290 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L291" class="LineNr">291 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c0d;</span> +<span id="L292" class="LineNr">292 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L293" class="LineNr">293 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L294" class="LineNr">294 </span> 3b <span class="Constant">18</span> <span class="Comment"># compare *EAX with EBX</span> +<span id="L295" class="LineNr">295 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> +<span id="L296" class="LineNr">296 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L297" class="LineNr">297 </span><span class="PreProc">0</span><span class="Constant">7</span> 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> +<span id="L298" class="LineNr">298 </span><span class="traceContains">+run: compare r/m32 with <a href='010---vm.cc.html#L16'>EBX</a></span> +<span id="L299" class="LineNr">299 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L300" class="LineNr">300 </span><span class="traceContains">+run: SF=0; ZF=0; OF=0</span> +<span id="L301" class="LineNr">301 </span> +<span id="L302" class="LineNr">302 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L303" class="LineNr">303 </span><span class="Normal">case</span> <span class="Constant">0x3b</span>: <span class="Delimiter">{</span> <span class="Comment">// set SF if r32 < r/m32</span> +<span id="L304" class="LineNr">304 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L305" class="LineNr">305 </span> <span class="Normal">uint8_t</span> reg1 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> +<span id="L306" class="LineNr">306 </span> <a href='003trace.cc.html#L196'>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">"compare r/m32 with "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L307" class="LineNr">307 </span> <span class="Normal">int32_t</span> arg1 = Reg[reg1]<span class="Delimiter">.</span>i<span class="Delimiter">;</span> +<span id="L308" class="LineNr">308 </span> <span class="Normal">int32_t</span>* arg2 = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L309" class="LineNr">309 </span> <span class="Normal">int32_t</span> tmp1 = arg1 - *arg2<span class="Delimiter">;</span> +<span id="L310" class="LineNr">310 </span> SF = <span class="Delimiter">(</span>tmp1 < <span class="Constant">0</span><span class="Delimiter">);</span> +<span id="L311" class="LineNr">311 </span> ZF = <span class="Delimiter">(</span>tmp1 == <span class="Constant">0</span><span class="Delimiter">);</span> +<span id="L312" class="LineNr">312 </span> <span class="Normal">int64_t</span> tmp2 = arg1 - *arg2<span class="Delimiter">;</span> +<span id="L313" class="LineNr">313 </span> <a href='010---vm.cc.html#L59'>OF</a> = <span class="Delimiter">(</span>tmp1 != tmp2<span class="Delimiter">);</span> +<span id="L314" class="LineNr">314 </span> <a href='003trace.cc.html#L196'>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">"SF="</span> << SF << <span class="Constant">"; ZF="</span> << ZF << <span class="Constant">"; OF="</span> << <a href='010---vm.cc.html#L59'>OF</a> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L315" class="LineNr">315 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L316" class="LineNr">316 </span><span class="Delimiter">}</span> +<span id="L317" class="LineNr">317 </span> +<span id="L318" class="LineNr">318 </span><span class="Delimiter">:(scenario compare_r32_with_mem_at_r32_lesser)</span> +<span id="L319" class="LineNr">319 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L320" class="LineNr">320 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c07;</span> +<span id="L321" class="LineNr">321 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L322" class="LineNr">322 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L323" class="LineNr">323 </span> 3b <span class="Constant">18</span> <span class="Comment"># compare *EAX with EBX</span> +<span id="L324" class="LineNr">324 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> +<span id="L325" class="LineNr">325 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L326" class="LineNr">326 </span>0d 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> +<span id="L327" class="LineNr">327 </span><span class="traceContains">+run: compare r/m32 with <a href='010---vm.cc.html#L16'>EBX</a></span> +<span id="L328" class="LineNr">328 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L329" class="LineNr">329 </span><span class="traceContains">+run: SF=1; ZF=0; OF=0</span> +<span id="L330" class="LineNr">330 </span> +<span id="L331" class="LineNr">331 </span><span class="Delimiter">:(scenario compare_r32_with_mem_at_r32_equal)</span> +<span id="L332" class="LineNr">332 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L333" class="LineNr">333 </span><span class="Special">% Reg[EBX].i = 0x0a0b0c0d;</span> +<span id="L334" class="LineNr">334 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L335" class="LineNr">335 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L336" class="LineNr">336 </span> 3b <span class="Constant">18</span> <span class="Comment"># compare *EAX with EBX</span> +<span id="L337" class="LineNr">337 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> +<span id="L338" class="LineNr">338 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L339" class="LineNr">339 </span>0d 0c 0b 0a <span class="Comment"># 0x0a0b0c0d</span> +<span id="L340" class="LineNr">340 </span><span class="traceContains">+run: compare r/m32 with <a href='010---vm.cc.html#L16'>EBX</a></span> +<span id="L341" class="LineNr">341 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L342" class="LineNr">342 </span><span class="traceContains">+run: SF=0; ZF=1; OF=0</span> +<span id="L343" class="LineNr">343 </span> +<span id="L344" class="LineNr">344 </span><span class="SalientComment">//:: copy (mov)</span> +<span id="L345" class="LineNr">345 </span> +<span id="L346" class="LineNr">346 </span><span class="Delimiter">:(scenario copy_r32_to_mem_at_r32)</span> +<span id="L347" class="LineNr">347 </span><span class="Special">% Reg[EBX].i = 0xaf;</span> +<span id="L348" class="LineNr">348 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L349" class="LineNr">349 </span>== <span class="Constant">0x1</span> +<span id="L350" class="LineNr">350 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L351" class="LineNr">351 </span> <span class="Constant">89</span> <span class="Constant">18</span> <span class="Comment"># copy EBX to *EAX</span> +<span id="L352" class="LineNr">352 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX)</span> +<span id="L353" class="LineNr">353 </span><span class="traceContains">+run: copy <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L354" class="LineNr">354 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L355" class="LineNr">355 </span><span class="traceContains">+run: storing 0x000000af</span> +<span id="L356" class="LineNr">356 </span> +<span id="L357" class="LineNr">357 </span><span class="Comment">//:</span> +<span id="L358" class="LineNr">358 </span> +<span id="L359" class="LineNr">359 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L360" class="LineNr">360 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8b"</span><span class="Delimiter">,</span> <span class="Constant">"copy rm32 to r32"</span><span class="Delimiter">);</span> +<span id="L361" class="LineNr">361 </span> +<span id="L362" class="LineNr">362 </span><span class="Delimiter">:(scenario copy_mem_at_r32_to_r32)</span> +<span id="L363" class="LineNr">363 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L364" class="LineNr">364 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L365" class="LineNr">365 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L366" class="LineNr">366 </span> 8b <span class="Constant">18</span> <span class="Comment"># copy *EAX to EBX</span> +<span id="L367" class="LineNr">367 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L368" class="LineNr">368 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L369" class="LineNr">369 </span>af <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 0xaf</span> +<span id="L370" class="LineNr">370 </span><span class="traceContains">+run: copy r/m32 to <a href='010---vm.cc.html#L16'>EBX</a></span> +<span id="L371" class="LineNr">371 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L372" class="LineNr">372 </span><span class="traceContains">+run: storing 0x000000af</span> +<span id="L373" class="LineNr">373 </span> +<span id="L374" class="LineNr">374 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L375" class="LineNr">375 </span><span class="Normal">case</span> <span class="Constant">0x8b</span>: <span class="Delimiter">{</span> <span class="Comment">// copy r32 to r/m32</span> +<span id="L376" class="LineNr">376 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L377" class="LineNr">377 </span> <span class="Normal">uint8_t</span> reg1 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> +<span id="L378" class="LineNr">378 </span> <a href='003trace.cc.html#L196'>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 r/m32 to "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L379" class="LineNr">379 </span> <span class="Normal">int32_t</span>* arg2 = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L380" class="LineNr">380 </span> Reg[reg1]<span class="Delimiter">.</span>i = *arg2<span class="Delimiter">;</span> +<span id="L381" class="LineNr">381 </span> <a href='003trace.cc.html#L196'>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#L260'>HEXWORD</a> << *arg2 << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L382" class="LineNr">382 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L383" class="LineNr">383 </span><span class="Delimiter">}</span> +<span id="L384" class="LineNr">384 </span> +<span id="L385" class="LineNr">385 </span><span class="Comment">//:</span> +<span id="L386" class="LineNr">386 </span> +<span id="L387" class="LineNr">387 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L388" class="LineNr">388 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"88"</span><span class="Delimiter">,</span> <span class="Constant">"copy r8 (lowermost byte of r32) to r8/m8-at-r32"</span><span class="Delimiter">);</span> +<span id="L389" class="LineNr">389 </span> +<span id="L390" class="LineNr">390 </span><span class="Delimiter">:(scenario copy_r8_to_mem_at_r32)</span> +<span id="L391" class="LineNr">391 </span><span class="Special">% Reg[EBX].i = 0xafafafaf;</span> +<span id="L392" class="LineNr">392 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L393" class="LineNr">393 </span>== <span class="Constant">0x1</span> +<span id="L394" class="LineNr">394 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L395" class="LineNr">395 </span> <span class="Constant">88</span> <span class="Constant">18</span> <span class="Comment"># copy just the lowermost byte of EBX to the byte at *EAX</span> +<span id="L396" class="LineNr">396 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L397" class="LineNr">397 </span><span class="traceContains">+run: copy lowermost byte of <a href='010---vm.cc.html#L16'>EBX</a> to r8/m8-at-r32</span> +<span id="L398" class="LineNr">398 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L399" class="LineNr">399 </span><span class="traceContains">+run: storing 0xaf</span> +<span id="L400" class="LineNr">400 </span><span class="Special">% CHECK_EQ(0x000000af, read_mem_u32(0x60));</span> +<span id="L401" class="LineNr">401 </span> +<span id="L402" class="LineNr">402 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L403" class="LineNr">403 </span><span class="Normal">case</span> <span class="Constant">0x88</span>: <span class="Delimiter">{</span> <span class="Comment">// copy r/m8 to r8</span> +<span id="L404" class="LineNr">404 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L405" class="LineNr">405 </span> <span class="Normal">uint8_t</span> reg2 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> +<span id="L406" class="LineNr">406 </span> <a href='003trace.cc.html#L196'>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 lowermost byte of "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg2<span class="Delimiter">)</span> << <span class="Constant">" to r8/m8-at-r32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L407" class="LineNr">407 </span> <span class="Comment">// use unsigned to zero-extend 8-bit value to 32 bits</span> +<span id="L408" class="LineNr">408 </span> <span class="Normal">uint8_t</span>* arg1 = <span class="Normal">reinterpret_cast</span><<span class="Normal">uint8_t</span>*><span class="Delimiter">(</span><a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">));</span> +<span id="L409" class="LineNr">409 </span> *arg1 = Reg[reg2]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> +<span id="L410" class="LineNr">410 </span> <a href='003trace.cc.html#L196'>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#L259'>HEXBYTE</a> << <a href='010---vm.cc.html#L262'>NUM</a><span class="Delimiter">(</span>*arg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L411" class="LineNr">411 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L412" class="LineNr">412 </span><span class="Delimiter">}</span> +<span id="L413" class="LineNr">413 </span> +<span id="L414" class="LineNr">414 </span><span class="Comment">//:</span> +<span id="L415" class="LineNr">415 </span> +<span id="L416" class="LineNr">416 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L417" class="LineNr">417 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8a"</span><span class="Delimiter">,</span> <span class="Constant">"copy r8/m8-at-r32 to r8 (lowermost byte of r32)"</span><span class="Delimiter">);</span> +<span id="L418" class="LineNr">418 </span> +<span id="L419" class="LineNr">419 </span><span class="Delimiter">:(scenario copy_mem_at_r32_to_r8)</span> +<span id="L420" class="LineNr">420 </span><span class="Special">% Reg[EBX].i = 0xaf;</span> +<span id="L421" class="LineNr">421 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L422" class="LineNr">422 </span>== <span class="Constant">0x1</span> +<span id="L423" class="LineNr">423 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L424" class="LineNr">424 </span> 8a <span class="Constant">18</span> <span class="Comment"># copy just the byte at *EAX to lowermost byte of EBX (clearing remaining bytes)</span> +<span id="L425" class="LineNr">425 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (dest EBX) 000 (src EAX)</span> +<span id="L426" class="LineNr">426 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L427" class="LineNr">427 </span>af ff ff ff <span class="Comment"># 0xaf with more data in following bytes</span> +<span id="L428" class="LineNr">428 </span><span class="traceContains">+run: copy r8/m8-at-r32 to lowermost byte of <a href='010---vm.cc.html#L16'>EBX</a></span> +<span id="L429" class="LineNr">429 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L430" class="LineNr">430 </span><span class="traceContains">+run: storing 0xaf</span> +<span id="L431" class="LineNr">431 </span> +<span id="L432" class="LineNr">432 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L433" class="LineNr">433 </span><span class="Normal">case</span> <span class="Constant">0x8a</span>: <span class="Delimiter">{</span> <span class="Comment">// copy r/m8 to r8</span> +<span id="L434" class="LineNr">434 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L435" class="LineNr">435 </span> <span class="Normal">uint8_t</span> reg1 = <span class="Delimiter">(</span>modrm>><span class="Constant">3</span><span class="Delimiter">)</span>&<span class="Constant">0x7</span><span class="Delimiter">;</span> +<span id="L436" class="LineNr">436 </span> <a href='003trace.cc.html#L196'>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 r8/m8-at-r32 to lowermost byte of "</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>reg1<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L437" class="LineNr">437 </span> <span class="Comment">// use unsigned to zero-extend 8-bit value to 32 bits</span> +<span id="L438" class="LineNr">438 </span> <span class="Normal">uint8_t</span>* arg2 = <span class="Normal">reinterpret_cast</span><<span class="Normal">uint8_t</span>*><span class="Delimiter">(</span><a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">));</span> +<span id="L439" class="LineNr">439 </span> Reg[reg1]<span class="Delimiter">.</span>u = <span class="Normal">static_cast</span><<span class="Normal">uint32_t</span>><span class="Delimiter">(</span>*arg2<span class="Delimiter">);</span> +<span id="L440" class="LineNr">440 </span> <a href='003trace.cc.html#L196'>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#L259'>HEXBYTE</a> << <a href='010---vm.cc.html#L262'>NUM</a><span class="Delimiter">(</span>*arg2<span class="Delimiter">)</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L441" class="LineNr">441 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L442" class="LineNr">442 </span><span class="Delimiter">}</span> +<span id="L443" class="LineNr">443 </span> +<span id="L444" class="LineNr">444 </span><span class="SalientComment">//:: jump</span> +<span id="L445" class="LineNr">445 </span> +<span id="L446" class="LineNr">446 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L447" class="LineNr">447 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"ff"</span><span class="Delimiter">,</span> <span class="Constant">"jump/push/call rm32 based on subop"</span><span class="Delimiter">);</span> +<span id="L448" class="LineNr">448 </span> +<span id="L449" class="LineNr">449 </span><span class="Delimiter">:(scenario jump_mem_at_r32)</span> +<span id="L450" class="LineNr">450 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L451" class="LineNr">451 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L452" class="LineNr">452 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L453" class="LineNr">453 </span> ff <span class="Constant">20</span> <span class="Comment"># jump to *EAX</span> +<span id="L454" class="LineNr">454 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 100 (jump to r/m32) 000 (src EAX)</span> +<span id="L455" class="LineNr">455 </span> <span class="PreProc">0</span><span class="Constant">5</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">1</span> +<span id="L456" class="LineNr">456 </span> <span class="PreProc">0</span><span class="Constant">5</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">2</span> +<span id="L457" class="LineNr">457 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L458" class="LineNr">458 </span><span class="Error">08</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 8</span> +<span id="L459" class="LineNr">459 </span><span class="traceContains">+run: inst: 0x00000001</span> +<span id="L460" class="LineNr">460 </span><span class="traceContains">+run: jump to r/m32</span> +<span id="L461" class="LineNr">461 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L462" class="LineNr">462 </span><span class="traceContains">+run: jumping to 0x00000008</span> +<span id="L463" class="LineNr">463 </span><span class="traceContains">+run: inst: 0x00000008</span> +<span id="L464" class="LineNr">464 </span><span class="traceAbsent">-run: inst: 0x00000003</span> +<span id="L465" class="LineNr">465 </span> +<span id="L466" class="LineNr">466 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L467" class="LineNr">467 </span><span class="Normal">case</span> <span class="Constant">0xff</span>: <span class="Delimiter">{</span> +<span id="L468" class="LineNr">468 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L469" class="LineNr">469 </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="L470" class="LineNr">470 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>subop<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L471" class="LineNr">471 </span> <span class="Normal">case</span> <span class="Constant">4</span>: <span class="Delimiter">{</span> <span class="Comment">// jump to r/m32</span> +<span id="L472" class="LineNr">472 </span> <a href='003trace.cc.html#L196'>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">"jump to r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L473" class="LineNr">473 </span> <span class="Normal">int32_t</span>* arg2 = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L474" class="LineNr">474 </span> <a href='010---vm.cc.html#L29'>EIP</a> = *arg2<span class="Delimiter">;</span> +<span id="L475" class="LineNr">475 </span> <a href='003trace.cc.html#L196'>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">"jumping to 0x"</span> << <a href='010---vm.cc.html#L260'>HEXWORD</a> << <a href='010---vm.cc.html#L29'>EIP</a> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L476" class="LineNr">476 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L477" class="LineNr">477 </span> <span class="Delimiter">}</span> +<span id="L478" class="LineNr">478 </span> <span class="Comment">// End Op ff Subops</span> +<span id="L479" class="LineNr">479 </span> <span class="Delimiter">}</span> +<span id="L480" class="LineNr">480 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L481" class="LineNr">481 </span><span class="Delimiter">}</span> +<span id="L482" class="LineNr">482 </span> +<span id="L483" class="LineNr">483 </span><span class="SalientComment">//:: push</span> +<span id="L484" class="LineNr">484 </span> +<span id="L485" class="LineNr">485 </span><span class="Delimiter">:(scenario push_mem_at_r32)</span> +<span id="L486" class="LineNr">486 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L487" class="LineNr">487 </span><span class="Special">% Reg[ESP].u = 0x14;</span> +<span id="L488" class="LineNr">488 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L489" class="LineNr">489 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L490" class="LineNr">490 </span> ff <span class="Constant">30</span> <span class="Comment"># push *EAX to stack</span> +<span id="L491" class="LineNr">491 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 110 (push r/m32) 000 (src EAX)</span> +<span id="L492" class="LineNr">492 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L493" class="LineNr">493 </span>af <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 0xaf</span> +<span id="L494" class="LineNr">494 </span><span class="traceContains">+run: <a href='012elf.cc.html#L84'>push</a> r/m32</span> +<span id="L495" class="LineNr">495 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L496" class="LineNr">496 </span><span class="traceContains">+run: decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000010</span> +<span id="L497" class="LineNr">497 </span><span class="traceContains">+run: pushing value 0x000000af</span> +<span id="L498" class="LineNr">498 </span> +<span id="L499" class="LineNr">499 </span><span class="Delimiter">:(before "End Op ff Subops")</span> +<span id="L500" class="LineNr">500 </span><span class="Normal">case</span> <span class="Constant">6</span>: <span class="Delimiter">{</span> <span class="Comment">// push r/m32 to stack</span> +<span id="L501" class="LineNr">501 </span> <a href='003trace.cc.html#L196'>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">"push r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L502" class="LineNr">502 </span> <span class="Normal">const</span> <span class="Normal">int32_t</span>* val = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L503" class="LineNr">503 </span> <a href='012elf.cc.html#L84'>push</a><span class="Delimiter">(</span>*val<span class="Delimiter">);</span> +<span id="L504" class="LineNr">504 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L505" class="LineNr">505 </span><span class="Delimiter">}</span> +<span id="L506" class="LineNr">506 </span> +<span id="L507" class="LineNr">507 </span><span class="SalientComment">//:: pop</span> +<span id="L508" class="LineNr">508 </span> +<span id="L509" class="LineNr">509 </span><span class="Delimiter">:(before "End Initialize Op Names(name)")</span> +<span id="L510" class="LineNr">510 </span><a href='001help.cc.html#L243'>put</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L228'>name</a><span class="Delimiter">,</span> <span class="Constant">"8f"</span><span class="Delimiter">,</span> <span class="Constant">"pop top of stack to rm32"</span><span class="Delimiter">);</span> +<span id="L511" class="LineNr">511 </span> +<span id="L512" class="LineNr">512 </span><span class="Delimiter">:(scenario pop_mem_at_r32)</span> +<span id="L513" class="LineNr">513 </span><span class="Special">% Reg[EAX].i = 0x60;</span> +<span id="L514" class="LineNr">514 </span><span class="Special">% Reg[ESP].u = 0x10;</span> +<span id="L515" class="LineNr">515 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L516" class="LineNr">516 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L517" class="LineNr">517 </span> <span class="Constant">8f</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># pop stack into *EAX</span> +<span id="L518" class="LineNr">518 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 000 (pop r/m32) 000 (dest EAX)</span> +<span id="L519" class="LineNr">519 </span>== <span class="Constant">0x10</span> <span class="Comment"># data segment</span> +<span id="L520" class="LineNr">520 </span><span class="Constant">30</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 0x30</span> +<span id="L521" class="LineNr">521 </span><span class="traceContains">+run: <a href='013direct_addressing.cc.html#L452'>pop</a> into r/m32</span> +<span id="L522" class="LineNr">522 </span><span class="traceContains">+run: effective address is 0x60 (EAX)</span> +<span id="L523" class="LineNr">523 </span><span class="traceContains">+run: popping value 0x00000030</span> +<span id="L524" class="LineNr">524 </span><span class="traceContains">+run: incrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000014</span> +<span id="L525" class="LineNr">525 </span> +<span id="L526" class="LineNr">526 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span> +<span id="L527" class="LineNr">527 </span><span class="Normal">case</span> <span class="Constant">0x8f</span>: <span class="Delimiter">{</span> <span class="Comment">// pop stack into r/m32</span> +<span id="L528" class="LineNr">528 </span> <span class="Normal">uint8_t</span> modrm = <a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">();</span> +<span id="L529" class="LineNr">529 </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 id="L530" class="LineNr">530 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>subop<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L531" class="LineNr">531 </span> <span class="Normal">case</span> <span class="Constant">0</span>: <span class="Delimiter">{</span> +<span id="L532" class="LineNr">532 </span> <a href='003trace.cc.html#L196'>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">"pop into r/m32"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L533" class="LineNr">533 </span> <span class="Normal">int32_t</span>* dest = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span> +<span id="L534" class="LineNr">534 </span> *dest = <a href='013direct_addressing.cc.html#L452'>pop</a><span class="Delimiter">();</span> +<span id="L535" class="LineNr">535 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L536" class="LineNr">536 </span> <span class="Delimiter">}</span> +<span id="L537" class="LineNr">537 </span> <span class="Delimiter">}</span> +<span id="L538" class="LineNr">538 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L539" class="LineNr">539 </span><span class="Delimiter">}</span> +<span id="L540" class="LineNr">540 </span> +<span id="L541" class="LineNr">541 </span><span class="SalientComment">//:: special-case for loading address from disp32 rather than register</span> +<span id="L542" class="LineNr">542 </span> +<span id="L543" class="LineNr">543 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_displacement)</span> +<span id="L544" class="LineNr">544 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L545" class="LineNr">545 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L546" class="LineNr">546 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L547" class="LineNr">547 </span> <span class="PreProc">0</span><span class="Constant">1</span> 1d <span class="Constant">60</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># add EBX to *0x60</span> +<span id="L548" class="LineNr">548 </span><span class="Comment"># ModR/M in binary: 00 (indirect mode) 011 (src EBX) 101 (dest in disp32)</span> +<span id="L549" class="LineNr">549 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L550" class="LineNr">550 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> +<span id="L551" class="LineNr">551 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L552" class="LineNr">552 </span><span class="traceContains">+run: effective address is 0x60 (disp32)</span> +<span id="L553" class="LineNr">553 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L554" class="LineNr">554 </span> +<span id="L555" class="LineNr">555 </span><span class="Delimiter">:(before "End Mod 0 Special-cases(addr)")</span> +<span id="L556" class="LineNr">556 </span><span class="Normal">case</span> <span class="Constant">5</span>: <span class="Comment">// exception: mod 0b00 rm 0b101 => incoming disp32</span> +<span id="L557" class="LineNr">557 </span> addr = <a href='011run.cc.html#L299'>next32</a><span class="Delimiter">();</span> +<span id="L558" class="LineNr">558 </span> <a href='003trace.cc.html#L196'>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">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (disp32)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L559" class="LineNr">559 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L560" class="LineNr">560 </span> +<span id="L561" class="LineNr">561 </span><span class="Comment">//:</span> +<span id="L562" class="LineNr">562 </span> +<span id="L563" class="LineNr">563 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_disp8)</span> +<span id="L564" class="LineNr">564 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L565" class="LineNr">565 </span><span class="Special">% Reg[EAX].i = 0x5e; // dest</span> +<span id="L566" class="LineNr">566 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L567" class="LineNr">567 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L568" class="LineNr">568 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">58</span> <span class="PreProc">0</span><span class="Constant">2</span> <span class="Comment"># add EBX to *(EAX+2)</span> +<span id="L569" class="LineNr">569 </span><span class="Comment"># ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L570" class="LineNr">570 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L571" class="LineNr">571 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> +<span id="L572" class="LineNr">572 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L573" class="LineNr">573 </span><span class="traceContains">+run: effective address is initially 0x5e (EAX)</span> +<span id="L574" class="LineNr">574 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp8)</span> +<span id="L575" class="LineNr">575 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L576" class="LineNr">576 </span> +<span id="L577" class="LineNr">577 </span><span class="Delimiter">:(before "End Mod Special-cases(addr)")</span> +<span id="L578" class="LineNr">578 </span><span class="Normal">case</span> <span class="Constant">1</span>: <span class="Comment">// indirect + disp8 addressing</span> +<span id="L579" class="LineNr">579 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>rm<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L580" class="LineNr">580 </span> <span class="Normal">default</span>: +<span id="L581" class="LineNr">581 </span> addr = Reg[rm]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> +<span id="L582" class="LineNr">582 </span> <a href='003trace.cc.html#L196'>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">"effective address is initially 0x"</span> << std::hex << addr << <span class="Constant">" ("</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>rm<span class="Delimiter">)</span> << <span class="Constant">")"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L583" class="LineNr">583 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L584" class="LineNr">584 </span> <span class="Comment">// End Mod 1 Special-cases(addr)</span> +<span id="L585" class="LineNr">585 </span> <span class="Delimiter">}</span> +<span id="L586" class="LineNr">586 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>addr > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L587" class="LineNr">587 </span> addr += <span class="Normal">static_cast</span><<span class="Normal">int8_t</span>><span class="Delimiter">(</span><a href='010---vm.cc.html#L214'>next</a><span class="Delimiter">());</span> +<span id="L588" class="LineNr">588 </span> <a href='003trace.cc.html#L196'>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">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (after adding disp8)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L589" class="LineNr">589 </span> <span class="Delimiter">}</span> +<span id="L590" class="LineNr">590 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L591" class="LineNr">591 </span> +<span id="L592" class="LineNr">592 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_negative_disp8)</span> +<span id="L593" class="LineNr">593 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L594" class="LineNr">594 </span><span class="Special">% Reg[EAX].i = 0x61; // dest</span> +<span id="L595" class="LineNr">595 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L596" class="LineNr">596 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L597" class="LineNr">597 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">58</span> ff <span class="Comment"># add EBX to *(EAX-1)</span> +<span id="L598" class="LineNr">598 </span><span class="Comment"># ModR/M in binary: 01 (indirect+disp8 mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L599" class="LineNr">599 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L600" class="LineNr">600 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> +<span id="L601" class="LineNr">601 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L602" class="LineNr">602 </span><span class="traceContains">+run: effective address is initially 0x61 (EAX)</span> +<span id="L603" class="LineNr">603 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp8)</span> +<span id="L604" class="LineNr">604 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L605" class="LineNr">605 </span> +<span id="L606" class="LineNr">606 </span><span class="Comment">//:</span> +<span id="L607" class="LineNr">607 </span> +<span id="L608" class="LineNr">608 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_disp32)</span> +<span id="L609" class="LineNr">609 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L610" class="LineNr">610 </span><span class="Special">% Reg[EAX].i = 0x5e; // dest</span> +<span id="L611" class="LineNr">611 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L612" class="LineNr">612 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L613" class="LineNr">613 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">98</span> <span class="PreProc">0</span><span class="Constant">2</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># add EBX to *(EAX+2)</span> +<span id="L614" class="LineNr">614 </span><span class="Comment"># ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L615" class="LineNr">615 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L616" class="LineNr">616 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> +<span id="L617" class="LineNr">617 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L618" class="LineNr">618 </span><span class="traceContains">+run: effective address is initially 0x5e (EAX)</span> +<span id="L619" class="LineNr">619 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp32)</span> +<span id="L620" class="LineNr">620 </span><span class="traceContains">+run: storing 0x00000011</span> +<span id="L621" class="LineNr">621 </span> +<span id="L622" class="LineNr">622 </span><span class="Delimiter">:(before "End Mod Special-cases(addr)")</span> +<span id="L623" class="LineNr">623 </span><span class="Normal">case</span> <span class="Constant">2</span>: <span class="Comment">// indirect + disp32 addressing</span> +<span id="L624" class="LineNr">624 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>rm<span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L625" class="LineNr">625 </span> <span class="Normal">default</span>: +<span id="L626" class="LineNr">626 </span> addr = Reg[rm]<span class="Delimiter">.</span>u<span class="Delimiter">;</span> +<span id="L627" class="LineNr">627 </span> <a href='003trace.cc.html#L196'>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">"effective address is initially 0x"</span> << std::hex << addr << <span class="Constant">" ("</span> << <a href='013direct_addressing.cc.html#L50'>rname</a><span class="Delimiter">(</span>rm<span class="Delimiter">)</span> << <span class="Constant">")"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L628" class="LineNr">628 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L629" class="LineNr">629 </span> <span class="Comment">// End Mod 2 Special-cases(addr)</span> +<span id="L630" class="LineNr">630 </span> <span class="Delimiter">}</span> +<span id="L631" class="LineNr">631 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>addr > <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> +<span id="L632" class="LineNr">632 </span> addr += <a href='011run.cc.html#L299'>next32</a><span class="Delimiter">();</span> +<span id="L633" class="LineNr">633 </span> <a href='003trace.cc.html#L196'>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">"effective address is 0x"</span> << std::hex << addr << <span class="Constant">" (after adding disp32)"</span> << <a href='003trace.cc.html#L222'>end</a><span class="Delimiter">();</span> +<span id="L634" class="LineNr">634 </span> <span class="Delimiter">}</span> +<span id="L635" class="LineNr">635 </span> <span class="Identifier">break</span><span class="Delimiter">;</span> +<span id="L636" class="LineNr">636 </span> +<span id="L637" class="LineNr">637 </span><span class="Delimiter">:(scenario add_r32_to_mem_at_r32_plus_negative_disp32)</span> +<span id="L638" class="LineNr">638 </span><span class="Special">% Reg[EBX].i = 0x10; // source</span> +<span id="L639" class="LineNr">639 </span><span class="Special">% Reg[EAX].i = 0x61; // dest</span> +<span id="L640" class="LineNr">640 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span> +<span id="L641" class="LineNr">641 </span><span class="Comment"># op ModR/M SIB displacement immediate</span> +<span id="L642" class="LineNr">642 </span> <span class="PreProc">0</span><span class="Constant">1</span> <span class="Constant">98</span> ff ff ff ff <span class="Comment"># add EBX to *(EAX-1)</span> +<span id="L643" class="LineNr">643 </span><span class="Comment"># ModR/M in binary: 10 (indirect+disp32 mode) 011 (src EBX) 000 (dest EAX)</span> +<span id="L644" class="LineNr">644 </span>== <span class="Constant">0x60</span> <span class="Comment"># data segment</span> +<span id="L645" class="LineNr">645 </span><span class="PreProc">0</span><span class="Constant">1</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 1</span> +<span id="L646" class="LineNr">646 </span><span class="traceContains">+run: add <a href='010---vm.cc.html#L16'>EBX</a> to r/m32</span> +<span id="L647" class="LineNr">647 </span><span class="traceContains">+run: effective address is initially 0x61 (EAX)</span> +<span id="L648" class="LineNr">648 </span><span class="traceContains">+run: effective address is 0x60 (after adding disp32)</span> +<span id="L649" class="LineNr">649 </span><span class="traceContains">+run: storing 0x00000011</span> </pre> </body> </html> |