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target/ppc: optimize hreg_compute_pmu_hflags_value

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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>
This commit is contained in:
Harsh Prateek Bora 2024-10-10 11:17:33 +05:30 • committed by Nicholas Piggin
parent 2bbddc08bc
commit 052af14ef2
1 changed files with 5 additions and 4 deletions
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9
target/ppc/helper_regs.c
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@ -83,15 +83,16 @@ static bool hreg_check_bhrb_enable(CPUPPCState *env)
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)) {