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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-03-05 07:26:42 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-03-29 07:40:17 -0700 |
| commit | 7ebba91361badf7531d4e75050627a88d424872f (patch) | |
| tree | d99781a37b47b95441ad358d119ec3741960d405 /sysdeps/x86_64/multiarch/strcmp-avx2-rtm.S | |
| parent | 91264fe3577fe887b4860923fa6142b5274c8965 (diff) | |
| download | glibc-7ebba91361badf7531d4e75050627a88d424872f.tar.gz glibc-7ebba91361badf7531d4e75050627a88d424872f.tar.xz glibc-7ebba91361badf7531d4e75050627a88d424872f.zip | |
x86-64: Add AVX optimized string/memory functions for RTM
Since VZEROUPPER triggers RTM abort while VZEROALL won't, select AVX optimized string/memory functions with xtest jz 1f vzeroall ret 1: vzeroupper ret at function exit on processors with usable RTM, but without 256-bit EVEX instructions to avoid VZEROUPPER inside a transactionally executing RTM region.
Diffstat (limited to 'sysdeps/x86_64/multiarch/strcmp-avx2-rtm.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcmp-avx2-rtm.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/strcmp-avx2-rtm.S b/sysdeps/x86_64/multiarch/strcmp-avx2-rtm.S new file mode 100644 index 0000000000..aecd30d97f --- /dev/null +++ b/sysdeps/x86_64/multiarch/strcmp-avx2-rtm.S @@ -0,0 +1,12 @@ +#ifndef STRCMP +# define STRCMP __strcmp_avx2_rtm +#endif + +#define ZERO_UPPER_VEC_REGISTERS_RETURN \ + ZERO_UPPER_VEC_REGISTERS_RETURN_XTEST + +#define VZEROUPPER_RETURN jmp L(return_vzeroupper) + +#define SECTION(p) p##.avx.rtm + +#include "strcmp-avx2.S" |