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Re: [PATCH 19/26] target/s390x: Simplify help_branch


From: Ilya Leoshkevich
Subject: Re: [PATCH 19/26] target/s390x: Simplify help_branch
Date: Wed, 30 Nov 2022 13:06:04 +0100

On Wed, Oct 05, 2022 at 08:44:14PM -0700, Richard Henderson wrote:
> Always use a tcg branch, instead of movcond.  The movcond
> was not a bad idea before PER was added, but since then
> we have either 2 or 3 actions to perform on each leg of
> the branch, and multiple movcond is inefficient.
> 
> Reorder the taken branch to be fallthrough of the tcg branch.
> This will be helpful later with TARGET_TB_PCREL.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  target/s390x/tcg/translate.c | 154 ++++++++++-------------------------
>  1 file changed, 44 insertions(+), 110 deletions(-)

Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>



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