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From: David Gibson <david@gibson.dropbear.id.au>
To: "Bruno Larsen (billionai)" <bruno.larsen@eldorado.org.br>
Cc: farosas@linux.ibm.com, richard.henderson@linaro.org,
	qemu-devel@nongnu.org, lucas.araujo@eldorado.org.br,
	fernando.valle@eldorado.org.br, qemu-ppc@nongnu.org,
	matheus.ferst@eldorado.org.br, luis.pires@eldorado.org.br
Subject: Re: [PATCH v5 1/4] target/ppc: used ternary operator when registering MAS
Date: Thu, 27 May 2021 14:13:17 +1000	[thread overview]
Message-ID: <YK8cXQEp1sNWgVqN@yekko> (raw)
In-Reply-To: <20210525115355.8254-2-bruno.larsen@eldorado.org.br>

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On Tue, May 25, 2021 at 08:53:52AM -0300, Bruno Larsen (billionai) wrote:
> The write calback decision when registering the MAS SPR has been turned
> into a ternary operation, rather than an if-then-else block.
> 
> This was done because when building without TCG, even though the
> compiler will optimize away the pointers to spr_write_generic*, it
> doesn't optimize away the decision and assignment to the local pointer,
> creating compiler errors. This cleanup looked better than using ifdefs,
> so  we decided to with it.
> 
> Signed-off-by: Bruno Larsen (billionai) <bruno.larsen@eldorado.org.br>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

Applied to ppc-for-6.1, thanks.

> ---
>  target/ppc/cpu_init.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
> index b696469d1a..40719f6480 100644
> --- a/target/ppc/cpu_init.c
> +++ b/target/ppc/cpu_init.c
> @@ -1205,15 +1205,12 @@ static void register_BookE206_sprs(CPUPPCState *env, uint32_t mas_mask,
>      /* TLB assist registers */
>      /* XXX : not implemented */
>      for (i = 0; i < 8; i++) {
> -        void (*uea_write)(DisasContext *ctx, int sprn, int gprn) =
> -            &spr_write_generic32;
> -        if (i == 2 && (mas_mask & (1 << i)) && (env->insns_flags & PPC_64B)) {
> -            uea_write = &spr_write_generic;
> -        }
>          if (mas_mask & (1 << i)) {
>              spr_register(env, mas_sprn[i], mas_names[i],
>                           SPR_NOACCESS, SPR_NOACCESS,
> -                         &spr_read_generic, uea_write,
> +                         &spr_read_generic,
> +                         (i == 2 && (env->insns_flags & PPC_64B))
> +                         ? &spr_write_generic : &spr_write_generic32,
>                           0x00000000);
>          }
>      }

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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  reply	other threads:[~2021-05-27  7:14 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-25 11:53 [PATCH v5 0/4] target/ppc: add support to disable-tcg Bruno Larsen (billionai)
2021-05-25 11:53 ` [PATCH v5 1/4] target/ppc: used ternary operator when registering MAS Bruno Larsen (billionai)
2021-05-27  4:13   ` David Gibson [this message]
2021-05-25 11:53 ` [PATCH v5 2/4] target/ppc: added ifdefs around TCG-only code Bruno Larsen (billionai)
2021-05-25 13:02   ` Philippe Mathieu-Daudé
2021-05-26 17:24     ` Bruno Piazera Larsen
2021-05-27  4:18       ` David Gibson
2021-05-25 11:53 ` [PATCH v5 3/4] target/ppc: created tcg-stub.c file Bruno Larsen (billionai)
2021-05-27  4:18   ` David Gibson
2021-05-25 11:53 ` [PATCH v5 4/4] target/ppc: updated meson.build to support disable-tcg Bruno Larsen (billionai)
2021-05-27  5:10   ` David Gibson

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