ASM_FMT_M5
op = ASM_OP_ST1_, fmt = ASM_FMT_M5;
op = ASM_OP_ST2_, fmt = ASM_FMT_M5;
op = ASM_OP_ST4_, fmt = ASM_FMT_M5;
op = ASM_OP_ST8_, fmt = ASM_FMT_M5;
op = ASM_OP_ST1_REL, fmt = ASM_FMT_M5;
op = ASM_OP_ST2_REL, fmt = ASM_FMT_M5;
op = ASM_OP_ST4_REL, fmt = ASM_FMT_M5;
op = ASM_OP_ST8_REL, fmt = ASM_FMT_M5;
op = ASM_OP_ST8_SPILL, fmt = ASM_FMT_M5;
case ASM_FMT_M5: