CMPXCHG16B

SEMAPHORE CMPXCHG16B x86_64

2 encoding forms.

X86_CMPXCHG16B_X86_LEGACY_0F_C7_229641
m128,
X86_LEGACY C7 /1 CMPXCHG16B
XED_CMPXCHG16B_X86_LEGACY_0F_C7_727178
MEM0:rcw:dq REG0=XED_REG_RDX:rcw:SUPP REG1=XED_REG_RAX:rcw:SUPP REG2=XED_REG_RCX:r:SUPP REG3=XED_REG_RBX:r:SUPP
X86_LEGACY C7 /1 CMPXCHG16B