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a6b7502ec0
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>
18 lines
412 B
ArmAsm
18 lines
412 B
ArmAsm
#if IS_IN (libc)
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# define VEC_SIZE 32
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# define VEC(i) ymm##i
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# define VMOVNT vmovntdq
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# define VMOVU vmovdqu
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# define VMOVA vmovdqa
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# define MOV_SIZE 4
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# define ZERO_UPPER_VEC_REGISTERS_RETURN \
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ZERO_UPPER_VEC_REGISTERS_RETURN_XTEST
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# define VZEROUPPER_RETURN jmp L(return)
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# define SECTION(p) p##.avx.rtm
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# define MEMMOVE_SYMBOL(p,s) p##_avx_##s##_rtm
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# include "memmove-vec-unaligned-erms.S"
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#endif
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