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authorH.J. Lu <hjl.tools@gmail.com>2017-10-22 07:58:54 -0700
committerH.J. Lu <hjl.tools@gmail.com>2017-10-22 08:00:18 -0700
commit7eda65f69e0e4533b76ca4614fe516de03fe2b3a (patch)
tree0b81497d81ea5be20c8a130f92c62f245a4e2089 /sysdeps/i386/fpu/libm-test-ulps
parent5d15c9697577d2c342b5ade820bfd7b84a736b23 (diff)
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i386: Replace assembly versions of e_exp2f with generic e_exp2f.c
This patch replaces i386 assembly versions of e_exp2f with generic
e_exp2f.c.  For workload-spec2017.wrf, on Nehalem, it improves
performance by:

                           Before            After     Improvement
reciprocal-throughput      112.996          40.0454       182%
latency                    126.581          54.4479       132%

On Skylake, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      113.14           39.447        186%
latency                    136.068          55.684        144%

On IvyBridge with --disable-multi-arch, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      132.521          40.3759       228%
latency                    145.791          58.4587       149%

	* sysdeps/i386/fpu/e_exp2f.S: Removed.
	* sysdeps/i386/fpu/w_exp2f.c: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_exp2f.c.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
	Add e_exp2f-sse2.
	(CFLAGS-e_exp2f-sse2.c): New.
	* sysdeps/i386/i686/fpu/multiarch/e_exp2f-sse2.c: New file.
	* sysdeps/i386/i686/fpu/multiarch/e_exp2f.c: Likewise.
Diffstat (limited to 'sysdeps/i386/fpu/libm-test-ulps')
-rw-r--r--sysdeps/i386/fpu/libm-test-ulps2
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index c826b29c2c..0aa18ea9b7 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1921,7 +1921,9 @@ ildouble: 1
 ldouble: 1
 
 Function: "exp2_upward":
+float: 1
 float128: 2
+ifloat: 1
 ifloat128: 2
 ildouble: 1
 ldouble: 1