From: Max Filippov <jcmvbkbc@gmail.com>
To: "Takayuki 'January June' Suwa" <jjsuwa_sys3175@yahoo.co.jp>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH 1/4] xtensa: Tweak some widen multiplications
Date: Sat, 11 Jun 2022 16:13:08 -0700 [thread overview]
Message-ID: <CAMo8Bf+Doy=6Q_PjR=b0vdHjE4W4p=OTyvq0VhaH9qngs+YJWg@mail.gmail.com> (raw)
In-Reply-To: <fcd45c0a-50a8-d7b8-7026-ff33db79291e@yahoo.co.jp>
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
prev parent reply other threads:[~2022-06-11 23:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-10 4:17 Takayuki 'January June' Suwa
2022-06-11 23:13 ` Max Filippov [this message]
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