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

["Alex Bennée" <alex.bennee@linaro.org>]

Richard Henderson <richard.henderson@linaro.org> writes:

> 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 <richard.henderson@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  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);
>      }
>  }


--
Alex Bennée