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| author | Kartik Agaram <vc@akkartik.com> | 2020-01-16 18:31:12 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-01-16 18:31:12 -0800 |
| commit | 6070c23e5e1c60d3bb169e43bddfa59b1d322427 (patch) | |
| tree | 9a70e378c33c15e4779cf94abda8f37c35a5d1da /html/069allocate.subx.html | |
| parent | 5a6601aba973ba1d1ef30b7b64438c25623b89c5 (diff) | |
| download | mu-6070c23e5e1c60d3bb169e43bddfa59b1d322427.tar.gz | |
5897 - rename comparison instructions
Signed and unsigned don't quite capture the essence of what the different combinations of x86 flags are doing for SubX. The crucial distinction is that one set of comparison operators is for integers and the second is for addresses.
Diffstat (limited to 'html/069allocate.subx.html')
| -rw-r--r-- | html/069allocate.subx.html | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/html/069allocate.subx.html b/html/069allocate.subx.html index ef63f935..d6ffe82c 100644 --- a/html/069allocate.subx.html +++ b/html/069allocate.subx.html @@ -133,7 +133,7 @@ if ('onhashchange' in window) { <span id="L72" class="LineNr"> 72 </span> 89/copy 3/mod/direct 2/rm32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy eax to edx</span> <span id="L73" class="LineNr"> 73 </span> 03/add 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># add *(ebp+12) to edx</span> <span id="L74" class="LineNr"> 74 </span> 3b/compare 1/mod/*+disp8 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx 4/disp8 <span class="Normal"> . </span> <span class="subxComment"># compare edx with *(ecx+4)</span> -<span id="L75" class="LineNr"> 75 </span> 73/jump-if-greater-or-equal-signed $allocate:abort/disp8 +<span id="L75" class="LineNr"> 75 </span> 73/jump-if->=-signed $allocate:abort/disp8 <span id="L76" class="LineNr"> 76 </span><span class="Constant">$allocate:commit</span>: <span id="L77" class="LineNr"> 77 </span> <span class="subxComment"># update ad->curr</span> <span id="L78" class="LineNr"> 78 </span> 89/copy 0/mod/indirect 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 2/r32/edx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy edx to *ecx</span> @@ -257,7 +257,7 @@ if ('onhashchange' in window) { <span id="L196" class="LineNr">196 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L197" class="LineNr">197 </span> <span class="subxComment"># if (eax == 0) abort</span> <span id="L198" class="LineNr">198 </span> 3d/compare-eax-and 0/imm32 -<span id="L199" class="LineNr">199 </span> 74/jump-if-equal $allocate-region:abort/disp8 +<span id="L199" class="LineNr">199 </span> 74/jump-if-= $allocate-region:abort/disp8 <span id="L200" class="LineNr">200 </span> <span class="subxComment"># earmark 8 bytes at the start for a new allocation descriptor</span> <span id="L201" class="LineNr">201 </span> <span class="subxS1Comment"># . *eax = eax + 8</span> <span id="L202" class="LineNr">202 </span> 89/copy 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy eax to ecx</span> |