AND_LOCK

LOGICAL I86 x86_64

AND_LOCK is an instruction of the x86_64 architecture (x86 / x86-64 (covers 16/32/64-bit modes)), category LOGICAL. This page lists its 6 encoding forms, distinguished by opcode bytes: 20, 21, 80, 81, 82, 83.

Each form below links to its full decode: the operand roles and where each one is encoded in the instruction, the flag and register effects, and any micro-op sequence authored for it.

XED_AND_LOCK_MEMb_IMMb_80r4
MEM0:rw:b IMM0:r:b
X86_LEGACY 80 /4 I86
XED_AND_LOCK_MEMb_IMMb_82r4
MEM0:rw:b IMM0:r:b
X86_LEGACY 82 /4 I86
XED_AND_LOCK_X86_LEGACY_ONEBYTE_20_498909
MEM0:rw:b REG0=GPR8_R():r
X86_LEGACY 20 /r I86
XED_AND_LOCK_X86_LEGACY_ONEBYTE_21_483603
MEM0:rw:v REG0=GPRv_R():r
X86_LEGACY 21 /r I86
XED_AND_LOCK_X86_LEGACY_ONEBYTE_81_10714
MEM0:rw:v IMM0:r:z
X86_LEGACY 81 /4 I86
XED_AND_LOCK_X86_LEGACY_ONEBYTE_83_187232
MEM0:rw:v IMM0:r:b:i8
X86_LEGACY 83 /4 I86