From: Xi Ruoyao <xry111@xry111.site>
To: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>,
Junxian Zhu <zhujunxian@oss.cipunited.com>
Cc: libc-alpha@sourceware.org
Subject: Re: [PATCH 2/2] MIPS: Hard-float rounding instructions support
Date: Wed, 27 Dec 2023 05:50:28 +0800 [thread overview]
Message-ID: <f5cf4b437bd9922827e758fc989bc25cf17423e7.camel@xry111.site> (raw)
In-Reply-To: <61ecc506-3796-49e1-a4f3-7a39807a1fc3@linaro.org>
On Tue, 2023-12-26 at 17:12 -0300, Adhemerval Zanella Netto wrote:
> Also, I see no point in implementing this optimizations with assembly where
> a C implementation would be way simpler and generate similar code. Similar
> to what I did for powerpc with sysdeps/powerpc/fpu/round_to_integer.h, I
> implemented a similar approach for MIPS [1]. The resulting code should be
> similar to the assembly implementation, taking in consideration the correct
> fix to save/restore floating-point exceptions. I did see no math regression
> on cfarm23 with a glibc built with -mabi=64 -mips64r2.
Is there a micro-benchmark result on the cfarm machine? AFAIK the FCSR
setting instruction may be much more slower than normal instructions, so
I'm not sure if this is really a win.
--
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University
next prev parent reply other threads:[~2023-12-26 21:50 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-25 10:35 [PATCH 0/2] Add hard-float rounding instructions support for MIPS architecture Junxian Zhu
2023-12-25 10:35 ` [PATCH 1/2] limb-alias-double.h: Fix missing semicolon Junxian Zhu
2023-12-25 10:35 ` [PATCH 2/2] MIPS: Hard-float rounding instructions support Junxian Zhu
2023-12-25 10:51 ` Xi Ruoyao
2023-12-26 2:37 ` Junxian Zhu
2023-12-26 8:29 ` Xi Ruoyao
2023-12-26 20:12 ` Adhemerval Zanella Netto
2023-12-26 21:50 ` Xi Ruoyao [this message]
2023-12-26 22:50 ` Xi Ruoyao
2023-12-27 13:25 ` Adhemerval Zanella Netto
2024-01-02 10:08 ` Junxian Zhu
2024-01-02 9:43 ` Junxian Zhu
2024-01-02 9:57 ` Xi Ruoyao
[not found] ` <5f0f4c83-f6d8-4af3-8cce-e12cd5314da1@oss.cipunited.com>
2024-01-31 9:08 ` Xi Ruoyao
2024-01-25 13:58 ` Junxian Zhu
2024-01-25 14:37 ` Xi Ruoyao
2023-12-25 12:36 ` YunQiang Su
2023-12-26 2:48 ` Junxian Zhu
2024-01-02 9:51 ` Junxian Zhu
2023-12-29 1:00 ` Joseph Myers
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