Re: [PATCH] xtensa: Make use of CLAMPS instruction if configured

[Max Filippov via Gcc-patches]

On Sun, Feb 26, 2023 at 9:27 AM Takayuki 'January June' Suwa
<jjsuwa_sys3...@yahoo.co.jp> wrote:
>
> This patch introduces the use of CLAMPS instruction when the instruction
> is configured.
>
>     /* example */
>     int test(int a) {
>       if (a < -512)
>         return -512;
>       if (a > 511)
>         return 511;
>       return a;
>     }
>
>     ;; prereq: TARGET_CLAMPS
>     test:
>         clamps  a2, a2, 9
>         ret.n
>
> gcc/ChangeLog:
>
>         * config/xtensa/xtensa-protos.h (xtensa_match_CLAMPS_imms_p):
>         New prototype.
>         * config/xtensa/xtensa.cc (xtensa_match_CLAMPS_imms_p):
>         New function.
>         * config/xtensa/xtensa.h (TARGET_CLAMPS): New macro definition.
>         * config/xtensa/xtensa.md (*xtensa_clamps): New insn pattern.
> ---
>  gcc/config/xtensa/xtensa-protos.h |  1 +
>  gcc/config/xtensa/xtensa.cc       | 13 +++++++++++
>  gcc/config/xtensa/xtensa.h        |  1 +
>  gcc/config/xtensa/xtensa.md       | 37 +++++++++++++++++++++++++++++++
>  4 files changed, 52 insertions(+)

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

-- 
Thanks.
-- Max