| Conditional operations |
| Name |
Description |
Code |
Operation |
operands |
operand size |
| set |
Set byte if true |
set<cond> dest |
dest = 1 if <cond> is true
dest = 0 if <cond> is false |
reg
mem |
byte |
| salc |
Set AL if carry |
salc |
al = 0xFF if CF=1
al = 0x00 if CF=0 |
|
|
| cmov |
Conditional move |
cmov<cond> dest,source |
dest = source
if <cond> is true |
reg, reg
reg, mem |
word, word
dword,dword |
| cmpxchg |
Compare and exchange |
cmpxchg dest,source |
dest = source if dest=al/ax/eax
al/ax/eax = dest otherwise |
reg,reg
mem,reg |
byte,byte
word,word
dword,dword |
| cmpxchg8b |
Compare and exchange 8 bytes |
cmpxchg8b dest |
dest = ecx:ebx if dest=edx:eax
edx:eax = dest otherwise |
mem |
qword |