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H.J. Lu ef8adeb041 x86: Add MathVec_Prefer_No_AVX512 to cpu-features [BZ #21967] 
AVX512 functions in mathvec are used on machines with AVX512.  An AVX2
wrapper is also provided and it can be used when the AVX512 version
isn't profitable.  MathVec_Prefer_No_AVX512 is addded to cpu-features.
If glibc.tune.hwcaps=MathVec_Prefer_No_AVX512 is set in GLIBC_TUNABLES
environment variable, the AVX2 wrapper will be used.

Tested on x86-64 machines with and without AVX512.  Also verified
glibc.tune.hwcaps=MathVec_Prefer_No_AVX512 on AVX512 machine.

	[BZ #21967]
	* sysdeps/x86/cpu-features.h (bit_arch_MathVec_Prefer_No_AVX512):
	New.
	(index_arch_MathVec_Prefer_No_AVX512): Likewise.
	* sysdeps/x86/cpu-tunables.c (TUNABLE_CALLBACK (set_hwcaps)):
	Handle MathVec_Prefer_No_AVX512.
	* sysdeps/x86_64/fpu/multiarch/ifunc-mathvec-avx512.h
	(IFUNC_SELECTOR): Return AVX2 version if MathVec_Prefer_No_AVX512
	is set.
 		2017-09-12 07:54:47 -07:00
..
bits Simplify HUGE_VAL definitions. 2017-08-31 15:50:50 +00:00
fpu hurd: fix libm link 2017-09-03 05:32:10 +02:00
nptl/bits Move shared pthread definitions to common headers 2017-05-09 17:49:17 -03:00
Makefile Remove x86 ifunc-defines.sym and rtld-global-offsets.sym 2016-05-11 05:51:39 -07:00
Versions Add _dl_x86_cpu_features to rtld_global 2015-08-13 03:41:22 -07:00
cacheinfo.c tunables: Add IFUNC selection and cache sizes 2017-06-20 08:37:28 -07:00
cpu-features-offsets.sym Remove x86 ifunc-defines.sym and rtld-global-offsets.sym 2016-05-11 05:51:39 -07:00
cpu-features.c x86: Add x86_64 to x86-64 HWCAP [BZ #22093] 2017-09-11 08:18:32 -07:00
cpu-features.h x86: Add MathVec_Prefer_No_AVX512 to cpu-features [BZ #21967] 2017-09-12 07:54:47 -07:00
cpu-tunables.c x86: Add MathVec_Prefer_No_AVX512 to cpu-features [BZ #21967] 2017-09-12 07:54:47 -07:00
dl-get-cpu-features.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-hwcap.h x86: Add x86_64 to x86-64 HWCAP [BZ #22093] 2017-09-11 08:18:32 -07:00
dl-procinfo.c x86: Add x86_64 to x86-64 HWCAP [BZ #22093] 2017-09-11 08:18:32 -07:00
dl-procinfo.h x86: Set dl_platform and dl_hwcap from CPU features [BZ #21391] 2017-05-03 13:44:35 -07:00
dl-tunables.list x86: Rename glibc.tune.ifunc to glibc.tune.hwcaps 2017-06-21 10:21:37 -07:00
elide.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
float128-abi.h Add float128 support for x86_64, x86. 2017-06-26 22:02:24 +00:00
fpu_control.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
init-arch.h x86: Add macros to implement ifunce selection in C 2017-06-05 08:28:13 -07:00
libc-start.c Delay initialization of CPU features struct in static binaries 2017-05-31 06:38:33 +05:30
linkmap.h Rename bits/linkmap.h to linkmap.h (bug 14912). 2015-09-04 19:44:27 +00:00
math-tests.h Add float128 support for x86_64, x86. 2017-06-26 22:02:24 +00:00
string_private.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tininess.h Use sysdeps/x86/tininess.h for i386 and x86_64 2012-10-30 20:38:31 -07:00
tst-get-cpu-features-static.c Add _dl_x86_cpu_features to rtld_global 2015-08-13 03:41:22 -07:00
tst-get-cpu-features.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00