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From: Max Filippov <jcmvbkbc@gmail.com>
Date: Sat, 11 Jun 2022 16:13:08 -0700
Message-ID: <CAMo8Bf+Doy=6Q_PjR=b0vdHjE4W4p=OTyvq0VhaH9qngs+YJWg@mail.gmail.com>
Subject: Re: [PATCH 1/4] xtensa: Tweak some widen multiplications
To: "Takayuki 'January June' Suwa" <jjsuwa_sys3175@yahoo.co.jp>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>
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On Thu, Jun 9, 2022 at 9:26 PM Takayuki 'January June' Suwa
<jjsuwa_sys3175@yahoo.co.jp> wrote:
>
> umulsidi3 is faster than umuldi3 even if library call, and is also
> prerequisite for fast constant division by multiplication.
>
> gcc/ChangeLog:
>
>         * config/xtensa/xtensa.md (mulsidi3, umulsidi3):
>         Split into individual signedness, in order to use libcall
>         "__umulsidi3" but not the other.
>         (<u>mulhisi3): Merge into one by using code iterator.
>         (<u>mulsidi3, mulhisi3, umulhisi3): Remove.
> ---
>   gcc/config/xtensa/xtensa.md | 56 +++++++++++++++++++++----------------
>   1 file changed, 32 insertions(+), 24 deletions(-)

Regtested for target=xtensa-linux-uclibc, no new regressions.
Committed to master.

-- 
Thanks.
-- Max