1ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Browncmpxchg %bl,%cl (al=22 bl=44 cl=33) 2ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown al!=cl so al should equal cl (Result al=33 bl=44 cl=33) 3ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Browncmpxchg %bl,%cl (al=77 bl=55 cl=55) 4ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown al==cl so cl should equal bl (Result al=55 bl=55 cl=55) 5ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Browncmpxchg %bx,%cx (ax=2222 bx=4444 cx=3333) 6ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ax!=cx so ax should equal cx (Result ax=3333 bx=4444 cx=3333) 7ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Browncmpxchg %bx,%cx (ax=7777 bx=5555 cx=5555) 8ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ax==cx so cx should equal bx (Result ax=5555 bx=5555 cx=5555) 9ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Browncmpxchg %ebx,%ecx (eax=22222222 ebx=44444444 ecx=33333333) 10ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown eax!=ecx so eax should equal ecx (Result eax=33333333 ebx=44444444 ecx=33333333) 11ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Browncmpxchg %ebx,%ecx (eax=77777777 ebx=55555555 ecx=55555555) 12ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown eax==ecx so ecx should equal ebx (Result eax=55555555 ebx=55555555 ecx=55555555) 13ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Browncmpxchg %rbx,%rcx (rax=222222222 rbx=444444444 rcx=333333333) 14ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown rax!=rcx so rax should equal rcx (Result rax=333333333 rbx=444444444 rcx=333333333) 15ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Browncmpxchg %rbx,%rcx (rax=777777777 rbx=555555555 rcx=555555555) 16ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown rax==rcx so ecx should equal rbx (Result rax=555555555 rbx=555555555 rcx=555555555) 17