target/ppc: optimize hreg_compute_pmu_hflags_value
Cache env->spr[SPR_POWER_MMCR0] in a local variable as used in multiple
conditions to avoid multiple indirect accesses.
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
diff --git a/target/ppc/helper_regs.c b/target/ppc/helper_regs.c
index fe543ab..7b23e5e 100644
--- a/target/ppc/helper_regs.c
+++ b/target/ppc/helper_regs.c
@@ -83,15 +83,16 @@
static uint32_t hreg_compute_pmu_hflags_value(CPUPPCState *env)
{
uint32_t hflags = 0;
-
#if defined(TARGET_PPC64)
- if (env->spr[SPR_POWER_MMCR0] & MMCR0_PMCC0) {
+ target_ulong mmcr0 = env->spr[SPR_POWER_MMCR0];
+
+ if (mmcr0 & MMCR0_PMCC0) {
hflags |= 1 << HFLAGS_PMCC0;
}
- if (env->spr[SPR_POWER_MMCR0] & MMCR0_PMCC1) {
+ if (mmcr0 & MMCR0_PMCC1) {
hflags |= 1 << HFLAGS_PMCC1;
}
- if (env->spr[SPR_POWER_MMCR0] & MMCR0_PMCjCE) {
+ if (mmcr0 & MMCR0_PMCjCE) {
hflags |= 1 << HFLAGS_PMCJCE;
}
if (hreg_check_bhrb_enable(env)) {
