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| author |   Noah Goldstein <goldstein.w.n@gmail.com> | 2022-06-08 21:16:51 -0700 |
|---|---|---|
| committer |   Andreas K. Hüttel <dilfridge@gentoo.org> | 2022-09-03 22:19:41 +0200 |
| commit | 7a32d09fec3513787cf266100564847d6c1c3a7a (patch) | |
| tree | ead59ccdda0dcaf4255401fff761cf5c4c8bf412 /sysdeps | |
| parent | x86: ZERO_UPPER_VEC_REGISTERS_RETURN_XTEST expect no transactions (diff) | |
| download | glibc-7a32d09fec3513787cf266100564847d6c1c3a7a.tar.gz glibc-7a32d09fec3513787cf266100564847d6c1c3a7a.tar.bz2 glibc-7a32d09fec3513787cf266100564847d6c1c3a7a.zip | |
x86: Align varshift table to 32-bytes
This ensures the load will never split a cache line.
(cherry picked from commit 0f91811333f23b61cf681cab2704b35a0a073b97)
(cherry picked from commit 6b4a2ab7e0bd0c0fd94753043b3fd88387c0c40a)
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/x86_64/multiarch/varshift.c | 5 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/varshift.h | 3 |
2 files changed, 5 insertions, 3 deletions
diff --git a/sysdeps/x86_64/multiarch/varshift.c b/sysdeps/x86_64/multiarch/varshift.c index c8210f0546..d27767520a 100644 --- a/sysdeps/x86_64/multiarch/varshift.c +++ b/sysdeps/x86_64/multiarch/varshift.c @@ -16,9 +16,10 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ -#include "varshift.h" +#include <stdint.h> -const int8_t ___m128i_shift_right[31] attribute_hidden = +const int8_t ___m128i_shift_right[31] attribute_hidden + __attribute__((aligned(32))) = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 diff --git a/sysdeps/x86_64/multiarch/varshift.h b/sysdeps/x86_64/multiarch/varshift.h index af30694488..ffd12d79e4 100644 --- a/sysdeps/x86_64/multiarch/varshift.h +++ b/sysdeps/x86_64/multiarch/varshift.h @@ -19,7 +19,8 @@ #include <stdint.h> #include <tmmintrin.h> -extern const int8_t ___m128i_shift_right[31] attribute_hidden; +extern const int8_t ___m128i_shift_right[31] attribute_hidden + __attribute__ ((aligned (32))); static __inline__ __m128i __m128i_shift_right (__m128i value, unsigned long int offset) |