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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:11:15 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-10-22 08:12:41 -0700 |
| commit | 5313581cb52fd5d3d2cf222ddb6f8f86f090974f (patch) | |
| tree | e2ec5d944c1089cec1de29c5c72c3fb600a8c3fb /NEWS | |
| parent | 6089a3ee24cede17e9443aef0aa72fa1a0ba1548 (diff) | |
| download | glibc-5313581cb52fd5d3d2cf222ddb6f8f86f090974f.tar glibc-5313581cb52fd5d3d2cf222ddb6f8f86f090974f.tar.gz glibc-5313581cb52fd5d3d2cf222ddb6f8f86f090974f.tar.bz2 glibc-5313581cb52fd5d3d2cf222ddb6f8f86f090974f.zip | |
i386: Replace assembly versions of e_powf with generic e_powf.c
This patch replaces i386 assembly versions of e_powf with generic
e_powf.c. For workload-spec2017.wrf, on Nehalem, it improves
performance by:
Before After Improvement
reciprocal-throughput 230.855 78.3358 194%
latency 231.685 94.1259 146%
On Skylake, it improves performance by:
Before After Improvement
reciprocal-throughput 239.858 47.4713 405%
latency 247.57 93.8798 163%
On IvyBridge with --disable-multi-arch, it improves performance by:
Before After Improvement
reciprocal-throughput 269.078 63.3758 324%
latency 271.473 102.091 165%
* sysdeps/i386/fpu/e_powf.S: Removed.
* sysdeps/i386/fpu/e_powf_log2_data.c: Likewise.
* sysdeps/i386/fpu/w_powf.c: Likewise.
* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_powf.c.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
Add e_powf-sse2.
(CFLAGS-e_powf-sse2.c): New.
* sysdeps/i386/i686/fpu/multiarch/e_powf-sse2.c: New file.
* sysdeps/i386/i686/fpu/multiarch/e_powf.c: Likewise.
Diffstat (limited to 'NEWS')
0 files changed, 0 insertions, 0 deletions