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target/ppc/mem_helper.c: Remove a conditional from dcbz_common() 

Instead of passing a bool and select a value within dcbz_common() let
the callers pass in the right value to avoid this conditional
statement. On PPC dcbz is often used to zero memory and some code uses
it a lot. This change improves the run time of a test case that copies
memory with a dcbz call in every iteration from 6.23 to 5.83 seconds.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <20240622204833.5F7C74E6000@zero.eik.bme.hu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
BALATON Zoltan 2024-06-22 22:48:33 +02:00 committed by Richard Henderson
parent 3b9991e35c
commit 73a93ae5f4
1 changed files with 3 additions and 4 deletions
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7
target/ppc/mem_helper.c
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@ -271,12 +271,11 @@ void helper_stsw(CPUPPCState *env, target_ulong addr, uint32_t nb,
}
static void dcbz_common(CPUPPCState *env, target_ulong addr,
uint32_t opcode, bool epid, uintptr_t retaddr)
uint32_t opcode, int mmu_idx, uintptr_t retaddr)
{
target_ulong mask, dcbz_size = env->dcache_line_size;
uint32_t i;
void *haddr;
int mmu_idx = epid ? PPC_TLB_EPID_STORE : ppc_env_mmu_index(env, false);
#if defined(TARGET_PPC64)
/* Check for dcbz vs dcbzl on 970 */
@ -309,12 +308,12 @@ static void dcbz_common(CPUPPCState *env, target_ulong addr,
void helper_dcbz(CPUPPCState *env, target_ulong addr, uint32_t opcode)
{
dcbz_common(env, addr, opcode, false, GETPC());
dcbz_common(env, addr, opcode, ppc_env_mmu_index(env, false), GETPC());
}
void helper_dcbzep(CPUPPCState *env, target_ulong addr, uint32_t opcode)
{
dcbz_common(env, addr, opcode, true, GETPC());
dcbz_common(env, addr, opcode, PPC_TLB_EPID_STORE, GETPC());
}
void helper_icbi(CPUPPCState *env, target_ulong addr)