i386: Replace assembly versions of e_powf with generic e_powf.cmaster
commit5313581cb52fd5d3d2cf222ddb6f8f86f090974f
authorH.J. Lu <hjl.tools@gmail.com>
Sun, 22 Oct 2017 15:11:15 +0000 (22 08:11 -0700)
committerH.J. Lu <hjl.tools@gmail.com>
Sun, 22 Oct 2017 15:12:41 +0000 (22 08:12 -0700)
treee2ec5d944c1089cec1de29c5c72c3fb600a8c3fb
parent6089a3ee24cede17e9443aef0aa72fa1a0ba1548
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.
ChangeLog
sysdeps/i386/fpu/e_powf.S [deleted file]
sysdeps/i386/fpu/e_powf_log2_data.c [deleted file]
sysdeps/i386/fpu/libm-test-ulps
sysdeps/i386/fpu/w_powf.c [deleted file]
sysdeps/i386/i686/fpu/multiarch/Makefile
sysdeps/i386/i686/fpu/multiarch/e_powf-sse2.c [new file with mode: 0644]
sysdeps/i386/i686/fpu/multiarch/e_powf.c [new file with mode: 0644]
sysdeps/i386/i686/fpu/multiarch/libm-test-ulps