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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> | 2022-01-27 11:33:05 -0800 |
| commit | 2a7cef79d5da8a2b3b1c4b368efb81c69c8403b9 (patch) | |
| tree | 260eacf7020bd8302236aa7c3847ae3c5227b7d1 /sysdeps/x86_64/multiarch/memcmp-avx2-movbe-rtm.S | |
| parent | 43e3ba09ece40ba4beb3d3c985190209ecc6a052 (diff) | |
| download | glibc-2a7cef79d5da8a2b3b1c4b368efb81c69c8403b9.tar.gz glibc-2a7cef79d5da8a2b3b1c4b368efb81c69c8403b9.tar.xz glibc-2a7cef79d5da8a2b3b1c4b368efb81c69c8403b9.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. (cherry picked from commit 7ebba91361badf7531d4e75050627a88d424872f)
Diffstat (limited to 'sysdeps/x86_64/multiarch/memcmp-avx2-movbe-rtm.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/memcmp-avx2-movbe-rtm.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/memcmp-avx2-movbe-rtm.S b/sysdeps/x86_64/multiarch/memcmp-avx2-movbe-rtm.S new file mode 100644 index 0000000000..cf4eff5d4a --- /dev/null +++ b/sysdeps/x86_64/multiarch/memcmp-avx2-movbe-rtm.S @@ -0,0 +1,12 @@ +#ifndef MEMCMP +# define MEMCMP __memcmp_avx2_movbe_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 "memcmp-avx2-movbe.S" |