xchgl      A=fbca7654 B=12345678
xchgw      A=12347654 B=fbca5678
xchgb      A=12345654 B=fbca7678
xchgl      A=fbca7654 B=12345678
xchgw      A=12347654 B=fbca5678
xchgb      A=12345654 B=fbca7678
xaddl      A=fbca7654 B=0dfecccc
xaddw      A=12347654 B=fbcacccc
xaddb      A=12345654 B=fbca76cc
xaddl same res=2468acf0
xaddl      A=fbca7654 B=0dfecccc
xaddw      A=12347654 B=fbcacccc
xaddb      A=12345654 B=fbca76cc
cmpxchgl   EAX=fbca7654 A=12345678 C=12345678
cmpxchgw   EAX=fbca7654 A=12345678 C=fbca5678
cmpxchgb   EAX=fbca7654 A=12345678 C=fbca7678
cmpxchgl   EAX=fffefdfc A=12345678 C=fbca7654
cmpxchgw   EAX=fffefdfc A=12345678 C=fbca7654
cmpxchgb   EAX=fffefdfc A=12345678 C=fbca7654
cmpxchgl   EAX=fbca7654 A=12345678 C=12345678
cmpxchgw   EAX=fbca7654 A=12345678 C=fbca5678
cmpxchgb   EAX=fbca7654 A=12345678 C=fbca7678
cmpxchgl   EAX=fffefdfc A=12345678 C=fbca7654
cmpxchgw   EAX=fffefdfc A=12345678 C=fbca7654
cmpxchgb   EAX=fffefdfc A=12345678 C=fbca7654
cmpxchg8b: eax=65423456 edx=000fbca7 op1=000fbca765423456 CC=00
cmpxchg8b: eax=6789abcd edx=00012345 op1=0006532432432434 CC=40