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Re: [PATCH 7/7] target/alpha: Tidy helper_fp_exc_raise_s


From: Philippe Mathieu-Daudé
Subject: Re: [PATCH 7/7] target/alpha: Tidy helper_fp_exc_raise_s
Date: Sat, 21 Sep 2019 10:57:31 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0

On 9/21/19 6:32 AM, Richard Henderson wrote:
> Remove a redundant masking of ignore.  Once that's gone it is
> obvious that the system-mode inner test is redundant with the
> outer test.  Move the fpcr_exc_enable masking up and tidy.
> 
> No functional change.
> 
> Signed-off-by: Richard Henderson <address@hidden>

Reviewed-by: Philippe Mathieu-Daudé <address@hidden>

> ---
>  target/alpha/fpu_helper.c | 15 ++++-----------
>  1 file changed, 4 insertions(+), 11 deletions(-)
> 
> diff --git a/target/alpha/fpu_helper.c b/target/alpha/fpu_helper.c
> index 62a066d902..df8b58963b 100644
> --- a/target/alpha/fpu_helper.c
> +++ b/target/alpha/fpu_helper.c
> @@ -90,25 +90,18 @@ void helper_fp_exc_raise_s(CPUAlphaState *env, uint32_t 
> ignore, uint32_t regno)
>      uint32_t exc = env->error_code & ~ignore;
>      if (exc) {
>          env->fpcr |= exc;
> -        exc &= ~ignore;
> -#ifdef CONFIG_USER_ONLY
> -        /*
> -         * In user mode, the kernel's software handler only
> -         * delivers a signal if the exception is enabled.
> -         */
> -        if (!(exc & env->fpcr_exc_enable)) {
> -            return;
> -        }
> -#else
> +        exc &= env->fpcr_exc_enable;
>          /*
>           * In system mode, the software handler gets invoked
>           * for any non-ignored exception.
> +         * In user mode, the kernel's software handler only
> +         * delivers a signal if the exception is enabled.
>           */
> +#ifdef CONFIG_USER_ONLY
>          if (!exc) {
>              return;
>          }
>  #endif
> -        exc &= env->fpcr_exc_enable;
>          fp_exc_raise1(env, GETPC(), exc, regno, EXC_M_SWC);
>      }
>  }
> 




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