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 2/2] xtensa: Reflect the 32-bit Integer Divide Option
Date: Fri, 13 May 2022 02:37:18 -0700 [thread overview]
Message-ID: <CAMo8Bf+KccQmoG_jAjX8wyLKfjFTVUrmBj1mpBdC4Q0pAm4ugg@mail.gmail.com> (raw)
In-Reply-To: <5f99c6da-aa0c-5384-ee48-3556a03a6bf0@yahoo.co.jp>
On Fri, May 6, 2022 at 3:36 AM Takayuki 'January June' Suwa via
Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
>
> On Espressif's ESP8266 (based on Tensilica LX106, no hardware divider),
> this patch reduces the size of each:
>
> __moddi3() @ libgcc.a : 969 -> 301 (saves 668)
> __divmoddi4() : 1111 -> 426 (saves 685)
> __udivmoddi4() : 1043 -> 319 (saves 724)
>
> in bytes, respectively.
>
> gcc/ChangeLog:
>
> * config/xtensa/xtensa.h (TARGET_HAS_NO_HW_DIVIDE): New macro
> definition.
> ---
> gcc/config/xtensa/xtensa.h | 5 +++++
> 1 file changed, 5 insertions(+)
Regtested for target=xtensa-linux-uclibc, there's new regression in
gcc.c-torture/execute/20101011-1.c
related to division by 0 implemented as an invalid opcode exception
that the kernel should convert to division by 0 signal, but does not.
It should be fixed in the kernel.
Committed to master.
--
Thanks.
-- Max
prev parent reply other threads:[~2022-05-13 9:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-06 10:34 Takayuki 'January June' Suwa
2022-05-13 9:37 ` Max Filippov [this message]
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