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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 13:33:50 +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
--- Comment #17 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU C Library master sources".
The branch, hjl/expf/master has been created
at e0e4259030c1c025bd443e49e6095e7dc4367db5 (commit)
- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e0e4259030c1c025bd443e49e6095e7dc4367db5
commit e0e4259030c1c025bd443e49e6095e7dc4367db5
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Aug 15 08:45:34 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 and 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.
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