mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 22:00:08 +00:00
a7392db2ff
No bug.
The optimizations are as follows:
1) Always align entry to 64 bytes. This makes behavior more
predictable and makes other frontend optimizations easier.
2) Make the L(more_8x_vec) cases 4k aliasing aware. This can have
significant benefits in the case that:
0 < (dst - src) < [256, 512]
3) Align before `rep movsb`. For ERMS this is roughly a [0, 30%]
improvement and for FSRM [-10%, 25%].
In addition to these primary changes there is general cleanup
throughout to optimize the aligning routines and control flow logic.
Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
(cherry picked from commit a6b7502ec0)
13 lines
275 B
ArmAsm
13 lines
275 B
ArmAsm
#if IS_IN (libc)
|
|
# define VEC_SIZE 32
|
|
# define VEC(i) ymm##i
|
|
# define VMOVNT vmovntdq
|
|
# define VMOVU vmovdqu
|
|
# define VMOVA vmovdqa
|
|
# define MOV_SIZE 4
|
|
# define SECTION(p) p##.avx
|
|
# define MEMMOVE_SYMBOL(p,s) p##_avx_##s
|
|
|
|
# include "memmove-vec-unaligned-erms.S"
|
|
#endif
|