mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 17:11:06 +00:00
ef8adeb041
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. |
||
---|---|---|
.. | ||
aarch64 | ||
alpha | ||
arm | ||
generic | ||
gnu | ||
hppa | ||
i386 | ||
ia64 | ||
ieee754 | ||
init_array | ||
m68k | ||
mach | ||
microblaze | ||
mips | ||
nios2 | ||
nptl | ||
posix | ||
powerpc | ||
pthread | ||
s390 | ||
sh | ||
sparc | ||
tile | ||
unix | ||
wordsize-32 | ||
wordsize-64 | ||
x86 | ||
x86_64 |