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[Bug math/21912] Optimize float math functions with FMA
- From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Wed, 16 Aug 2017 15:46:47 +0000
- Subject: [Bug math/21912] Optimize float math functions with FMA
- Auto-submitted: auto-generated
- References: <bug-21912-131@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=21912
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The branch, master has been updated
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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=24a2e6588d2e0c91b4003878b0625d4a9360e8f3
commit 24a2e6588d2e0c91b4003878b0625d4a9360e8f3
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Wed Aug 16 08:43:35 2017 -0700
x86-64: Optimize e_expf with FMA [BZ #21912]
FMA optimized e_expf improves performance by more than 50% on Skylake.
[BZ #21912]
* sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines):
Add e_expf-fma.
* sysdeps/x86_64/fpu/multiarch/e_expf-fma.S: New file.
* sysdeps/x86_64/fpu/multiarch/e_expf.c: Likewise.
* sysdeps/x86_64/fpu/multiarch/ifunc-fma.h: Likewise.
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 9 ++
sysdeps/x86_64/fpu/multiarch/Makefile | 3 +
sysdeps/x86_64/fpu/multiarch/e_expf-fma.S | 182 +++++++++++++++++++++++++++++
sysdeps/x86_64/fpu/multiarch/e_expf.c | 26 ++++
sysdeps/x86_64/fpu/multiarch/ifunc-fma.h | 34 ++++++
5 files changed, 254 insertions(+), 0 deletions(-)
create mode 100644 sysdeps/x86_64/fpu/multiarch/e_expf-fma.S
create mode 100644 sysdeps/x86_64/fpu/multiarch/e_expf.c
create mode 100644 sysdeps/x86_64/fpu/multiarch/ifunc-fma.h
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