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ef8adeb041
glibc/sysdeps
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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
..
aarch64 Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
alpha Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
arm Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
generic Define and use a libm_alias_float macro. 2017-09-11 23:21:25 +00:00
gnu posix: Sync glob with gnulib [BZ #1062] 2017-09-08 09:39:13 +02:00
hppa Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
i386 Remove remaining _HAVE_STRING_ARCH_* definitions (BZ #18858) 2017-09-06 14:35:23 -03:00
ia64 Prefer new libm function wrappers for !LIBM_SVID_COMPAT. 2017-09-05 23:35:55 +00:00
ieee754 Prefer new libm function wrappers for !LIBM_SVID_COMPAT. 2017-09-05 23:35:55 +00:00
init_array Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
m68k Simplify HUGE_VAL definitions. 2017-08-31 15:50:50 +00:00
mach hurd: Fix build without NO_HIDDEN 2017-09-12 01:34:19 +02:00
microblaze Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
mips Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
nios2 Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
nptl Remove extra semicolons in struct pthread_mutex (bug 21804) 2017-07-24 12:22:05 +02:00
posix hurd: Fix libc link 2017-09-03 04:36:29 +02:00
powerpc Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
pthread aio: Remove internal_function function attribute 2017-08-31 15:59:06 +02:00
s390 Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
sh Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
sparc Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
tile Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
unix Add thunderx2t99 and thunderx2t99p1 CPU names to tunables list 2017-09-08 11:02:09 -07:00
wordsize-32 Build divdi3 only for architecture that required it 2017-04-06 15:14:34 -03:00
wordsize-64 posix: Consolidate Linux glob implementation 2017-09-08 16:34:02 +02:00
x86 x86: Add MathVec_Prefer_No_AVX512 to cpu-features [BZ #21967] 2017-09-12 07:54:47 -07:00
x86_64 x86: Add MathVec_Prefer_No_AVX512 to cpu-features [BZ #21967] 2017-09-12 07:54:47 -07:00