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authorJoseph Myers <joseph@codesourcery.com>2017-09-20 16:54:05 +0000
committerJoseph Myers <joseph@codesourcery.com>2017-09-20 16:54:05 +0000
commitae8372d7e4c44f6839aa3d851d4d0cb486b81cd5 (patch)
tree83340587a4086402e9f1686c278aa1a264ef77e7 /sysdeps/ia64/dl-dtprocnum.h
parenta856d4d4a8a56eaefdddb58884bfa2bfe922ee4c (diff)
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Add SSE4.1 trunc, truncf (bug 20142).
This patch adds SSE4.1 versions of trunc and truncf, using the roundsd
/ roundss instructions, similar to the versions of ceil, floor, rint
and nearbyint functions we already have.  In my testing with the glibc
benchtests these are about 30% faster than the C versions for double,
20% faster for float.

Tested for x86_64.

	[BZ #20142]
	* sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines):
	Add s_trunc-c, s_truncf-c, s_trunc-sse4_1 and s_truncf-sse4_1.
	* sysdeps/x86_64/fpu/multiarch/s_trunc-c.c: New file.
	* sysdeps/x86_64/fpu/multiarch/s_trunc-sse4_1.S: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_trunc.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_truncf-c.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_truncf-sse4_1.S: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_truncf.c: Likewise.
Diffstat (limited to 'sysdeps/ia64/dl-dtprocnum.h')
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