ASM_FMT_M17
op = ASM_OP_FETCHADD4_ACQ, fmt = ASM_FMT_M17;
op = ASM_OP_FETCHADD8_ACQ, fmt = ASM_FMT_M17;
op = ASM_OP_FETCHADD4_REL, fmt = ASM_FMT_M17;
op = ASM_OP_FETCHADD8_REL, fmt = ASM_FMT_M17;
case ASM_FMT_M17: