diff --git a/util/m5/m5op_arm.S b/util/m5/m5op_arm.S
index b1fb9adc7..b9557ee9d 100644
--- a/util/m5/m5op_arm.S
+++ b/util/m5/m5op_arm.S
@@ -65,27 +65,27 @@ func:
                 RET;            \
         END(_f)
 
-#define ARM(reg) INST(m5_op, reg, 0, arm_func)
+#define ARM INST(m5_op, 0, 0, arm_func)
 #define QUIESCE INST(m5_op, 0, 0, quiesce_func)
-#define QUIESCENS(r1) INST(m5_op, r1, 0, quiescens_func)
-#define QUIESCECYC(r1) INST(m5_op, r1, 0, quiescecycle_func)
+#define QUIESCENS INST(m5_op, 0, 0, quiescens_func)
+#define QUIESCECYC INST(m5_op, 0, 0, quiescecycle_func)
 #define QUIESCETIME INST(m5_op, 0, 0, quiescetime_func)
 #define RPNS INST(m5_op, 0, 0, rpns_func)
-#define WAKE_CPU(r1) INST(m5_op, r1, 0, wakecpu_func)
-#define M5EXIT(reg) INST(m5_op, reg, 0, exit_func)
-#define INITPARAM(reg) INST(m5_op, reg, 0, initparam_func)
-#define LOADSYMBOL(reg) INST(m5_op, reg, 0, loadsymbol_func)
-#define RESET_STATS(r1, r2) INST(m5_op, r1, r2, resetstats_func)
-#define DUMP_STATS(r1, r2) INST(m5_op, r1, r2, dumpstats_func)
-#define DUMPRST_STATS(r1, r2) INST(m5_op, r1, r2, dumprststats_func)
-#define CHECKPOINT(r1, r2) INST(m5_op, r1, r2, ckpt_func)
+#define WAKE_CPU INST(m5_op, 0, 0, wakecpu_func)
+#define M5EXIT INST(m5_op, 0, 0, exit_func)
+#define INITPARAM INST(m5_op, 0, 0, initparam_func)
+#define LOADSYMBOL INST(m5_op, 0, 0, loadsymbol_func)
+#define RESET_STATS INST(m5_op, 0, 0, resetstats_func)
+#define DUMP_STATS INST(m5_op, 0, 0, dumpstats_func)
+#define DUMPRST_STATS INST(m5_op, 0, 0, dumprststats_func)
+#define CHECKPOINT INST(m5_op, 0, 0, ckpt_func)
 #define READFILE INST(m5_op, 0, 0, readfile_func)
 #define DEBUGBREAK INST(m5_op, 0, 0, debugbreak_func)
 #define SWITCHCPU INST(m5_op, 0, 0, switchcpu_func)
-#define ADDSYMBOL(r1,r2) INST(m5_op, r1, r2, addsymbol_func)
+#define ADDSYMBOL INST(m5_op, 0, 0, addsymbol_func)
 #define PANIC INST(m5_op, 0, 0, panic_func)
-#define WORK_BEGIN(r1,r2) INST(m5_op, r1, r2, work_begin_func)
-#define WORK_END(r1,r2) INST(m5_op, r1, r2, work_end_func)
+#define WORK_BEGIN INST(m5_op, 0, 0, work_begin_func)
+#define WORK_END INST(m5_op, 0, 0, work_end_func)
 
 #define AN_BSM INST(m5_op, an_bsm, 0, annotate_func)
 #define AN_ESM INST(m5_op, an_esm, 0, annotate_func)
@@ -106,27 +106,27 @@ func:
 
 .text
 
-SIMPLE_OP(arm, ARM(0))
+SIMPLE_OP(arm, ARM)
 SIMPLE_OP(quiesce, QUIESCE)
-SIMPLE_OP(quiesceNs, QUIESCENS(0))
-SIMPLE_OP(quiesceCycle, QUIESCECYC(0))
+SIMPLE_OP(quiesceNs, QUIESCENS)
+SIMPLE_OP(quiesceCycle, QUIESCECYC)
 SIMPLE_OP(quiesceTime, QUIESCETIME)
 SIMPLE_OP(rpns, RPNS)
-SIMPLE_OP(wakeCPU, WAKE_CPU(0))
-SIMPLE_OP(m5_exit, M5EXIT(0))
-SIMPLE_OP(m5_initparam, INITPARAM(0))
-SIMPLE_OP(m5_loadsymbol, LOADSYMBOL(0))
-SIMPLE_OP(m5_reset_stats, RESET_STATS(0, 0))
-SIMPLE_OP(m5_dump_stats, DUMP_STATS(0, 1))
-SIMPLE_OP(m5_dumpreset_stats, DUMPRST_STATS(0, 1))
-SIMPLE_OP(m5_checkpoint, CHECKPOINT(0, 1))
+SIMPLE_OP(wakeCPU, WAKE_CPU)
+SIMPLE_OP(m5_exit, M5EXIT)
+SIMPLE_OP(m5_initparam, INITPARAM)
+SIMPLE_OP(m5_loadsymbol, LOADSYMBOL)
+SIMPLE_OP(m5_reset_stats, RESET_STATS)
+SIMPLE_OP(m5_dump_stats, DUMP_STATS)
+SIMPLE_OP(m5_dumpreset_stats, DUMPRST_STATS)
+SIMPLE_OP(m5_checkpoint, CHECKPOINT)
 SIMPLE_OP(m5_readfile, READFILE)
 SIMPLE_OP(m5_debugbreak, DEBUGBREAK)
 SIMPLE_OP(m5_switchcpu, SWITCHCPU)
-SIMPLE_OP(m5_addsymbol, ADDSYMBOL(0, 1))
+SIMPLE_OP(m5_addsymbol, ADDSYMBOL)
 SIMPLE_OP(m5_panic, PANIC)
-SIMPLE_OP(m5_work_begin, WORK_BEGIN(0,1))
-SIMPLE_OP(m5_work_end, WORK_END(0,1))
+SIMPLE_OP(m5_work_begin, WORK_BEGIN)
+SIMPLE_OP(m5_work_end, WORK_END)
 
 SIMPLE_OP(m5a_bsm, AN_BSM)
 SIMPLE_OP(m5a_esm, AN_ESM)