Re: [PATCH v2 08/13] target/ppc: Merge helper_{dcbz,dcbzep}

[BALATON Zoltan]

On Tue, 9 Jul 2024, Richard Henderson wrote:
> Merge the two and pass the mmu_idx directly from translation.
> Swap the argument order in dcbz_common to avoid extra swaps.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/ppc/helper.h     |  3 +--
> target/ppc/mem_helper.c | 14 ++++----------
> target/ppc/translate.c  |  4 ++--
> 3 files changed, 7 insertions(+), 14 deletions(-)
>
> diff --git a/target/ppc/helper.h b/target/ppc/helper.h
> index afc56855ff..4fa089cbf9 100644
> --- a/target/ppc/helper.h
> +++ b/target/ppc/helper.h
> @@ -46,8 +46,7 @@ DEF_HELPER_FLAGS_3(stmw, TCG_CALL_NO_WG, void, env, tl, i32)
> DEF_HELPER_4(lsw, void, env, tl, i32, i32)
> DEF_HELPER_5(lswx, void, env, tl, i32, i32, i32)
> DEF_HELPER_FLAGS_4(stsw, TCG_CALL_NO_WG, void, env, tl, i32, i32)
> -DEF_HELPER_FLAGS_2(dcbz, TCG_CALL_NO_WG, void, env, tl)
> -DEF_HELPER_FLAGS_2(dcbzep, TCG_CALL_NO_WG, void, env, tl)
> +DEF_HELPER_FLAGS_3(dcbz, TCG_CALL_NO_WG, void, env, tl, int)
> #ifdef TARGET_PPC64
> DEF_HELPER_FLAGS_2(dcbzl, TCG_CALL_NO_WG, void, env, tl)

Why only dcbz but not dcbzl as well to make them uniform?

Regards,
BALATON Zoltan

> #endif
> diff --git a/target/ppc/mem_helper.c b/target/ppc/mem_helper.c
> index d4957efd6e..24bae3b80c 100644
> --- a/target/ppc/mem_helper.c
> +++ b/target/ppc/mem_helper.c
> @@ -271,7 +271,7 @@ void helper_stsw(CPUPPCState *env, target_ulong addr, 
> uint32_t nb,
> }
>
> static void dcbz_common(CPUPPCState *env, target_ulong addr,
> -                        int dcbz_size, int mmu_idx, uintptr_t retaddr)
> +                        int mmu_idx, int dcbz_size, uintptr_t retaddr)
> {
>     target_ulong mask = ~(target_ulong)(dcbz_size - 1);
>     void *haddr;
> @@ -296,15 +296,9 @@ static void dcbz_common(CPUPPCState *env, target_ulong 
> addr,
>     }
> }
>
> -void helper_dcbz(CPUPPCState *env, target_ulong addr)
> +void helper_dcbz(CPUPPCState *env, target_ulong addr, int mmu_idx)
> {
> -    dcbz_common(env, addr, env->dcache_line_size,
> -                ppc_env_mmu_index(env, false), GETPC());
> -}
> -
> -void helper_dcbzep(CPUPPCState *env, target_ulong addr)
> -{
> -    dcbz_common(env, addr, env->dcache_line_size, PPC_TLB_EPID_STORE, GETPC());
> +    dcbz_common(env, addr, mmu_idx, env->dcache_line_size, GETPC());
> }
>
> #ifdef TARGET_PPC64
> @@ -320,7 +314,7 @@ void helper_dcbzl(CPUPPCState *env, target_ulong addr)
>         dcbz_size = 32;
>     }
>
> -    dcbz_common(env, addr, dcbz_size, ppc_env_mmu_index(env, false), GETPC());
> +    dcbz_common(env, addr, ppc_env_mmu_index(env, false), dcbz_size, GETPC());
> }
> #endif
>
> diff --git a/target/ppc/translate.c b/target/ppc/translate.c
> index 2664c94522..285734065b 100644
> --- a/target/ppc/translate.c
> +++ b/target/ppc/translate.c
> @@ -4458,7 +4458,7 @@ static void gen_dcbz(DisasContext *ctx)
>     }
> #endif
>
> -    gen_helper_dcbz(tcg_env, tcgv_addr);
> +    gen_helper_dcbz(tcg_env, tcgv_addr, tcg_constant_i32(ctx->mem_idx));
> }
>
> /* dcbzep */
> @@ -4468,7 +4468,7 @@ static void gen_dcbzep(DisasContext *ctx)
>
>     gen_set_access_type(ctx, ACCESS_CACHE);
>     gen_addr_reg_index(ctx, tcgv_addr);
> -    gen_helper_dcbzep(tcg_env, tcgv_addr);
> +    gen_helper_dcbz(tcg_env, tcgv_addr, tcg_constant_i32(PPC_TLB_EPID_STORE));
> }
>
> /* dst / dstt */