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 3/4] xtensa: Optimize '(~x & y)' to '((x & y) ^ y)'
Date: Thu, 9 Jun 2022 15:12:51 -0700 [thread overview]
Message-ID: <CAMo8BfJM4sW1mePwojkmcRSamWZyA06XHC=BTW=01JOwMYwn=g@mail.gmail.com> (raw)
In-Reply-To: <123a21c0-f79a-70a4-9ee6-abf874e3a695@yahoo.co.jp>
On Sun, May 29, 2022 at 4:00 AM Takayuki 'January June' Suwa
<jjsuwa_sys3175@yahoo.co.jp> wrote:
>
> In Xtensa ISA, there is no single machine instruction that calculates unary
> bitwise negation.
>
> gcc/ChangeLog:
>
> * config/xtensa/xtensa.md (*andsi3_bitcmpl):
> New insn_and_split pattern.
>
> gcc/testsuite/ChangeLog:
>
> * gcc.target/xtensa/check_zero_byte.c: New.
> ---
> gcc/config/xtensa/xtensa.md | 20 +++++++++++++++++++
> .../gcc.target/xtensa/check_zero_byte.c | 9 +++++++++
> 2 files changed, 29 insertions(+)
> create mode 100644 gcc/testsuite/gcc.target/xtensa/check_zero_byte.c
Regtested for target=xtensa-linux-uclibc, no new regressions.
Committed to master.
--
Thanks.
-- Max
prev parent reply other threads:[~2022-06-09 22:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-29 10:55 Takayuki 'January June' Suwa
2022-06-09 22:12 ` Max Filippov [this message]
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