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glibc/sysdeps/x86
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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
cacheinfo.c tunables: Add IFUNC selection and cache sizes 2017-06-20 08:37:28 -07:00
cpu-features-offsets.sym
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
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
dl-tunables.list x86: Rename glibc.tune.ifunc to glibc.tune.hwcaps 2017-06-21 10:21:37 -07:00
elide.h
float128-abi.h Add float128 support for x86_64, x86. 2017-06-26 22:02:24 +00:00
fpu_control.h
init-arch.h
libc-start.c
linkmap.h
Makefile
math-tests.h Add float128 support for x86_64, x86. 2017-06-26 22:02:24 +00:00
string_private.h
tininess.h
tst-get-cpu-features-static.c
tst-get-cpu-features.c
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