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author | H.J. Lu <hjl.tools@gmail.com> | 2017-06-05 11:09:48 -0700 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2017-06-05 11:09:59 -0700 |
commit | ef9c4cb6c7abb6340b52e19de31d2a56c8de5844 (patch) | |
tree | e97752428e31d5d595c22a44b1905b5a91948d24 /sysdeps/x86_64/multiarch/memset-avx512-unaligned-erms.S | |
parent | 9cd30491dd6d9d4c5e9372d7a5c75f78f3a11260 (diff) | |
download | glibc-ef9c4cb6c7abb6340b52e19de31d2a56c8de5844.tar.gz glibc-ef9c4cb6c7abb6340b52e19de31d2a56c8de5844.tar.xz glibc-ef9c4cb6c7abb6340b52e19de31d2a56c8de5844.zip |
x86-64: Optimize wmemset with SSE2/AVX2/AVX512
The difference between memset and wmemset is byte vs int. Add stubs to SSE2/AVX2/AVX512 memset for wmemset with updated constant and size: SSE2 wmemset: shl $0x2,%rdx movd %esi,%xmm0 mov %rdi,%rax pshufd $0x0,%xmm0,%xmm0 jmp entry_from_wmemset SSE2 memset: movd %esi,%xmm0 mov %rdi,%rax punpcklbw %xmm0,%xmm0 punpcklwd %xmm0,%xmm0 pshufd $0x0,%xmm0,%xmm0 entry_from_wmemset: Since the ERMS versions of wmemset requires "rep stosl" instead of "rep stosb", only the vector store stubs of SSE2/AVX2/AVX512 wmemset are added. The SSE2 wmemset is about 3X faster and the AVX2 wmemset is about 6X faster on Haswell. * include/wchar.h (__wmemset_chk): New. * sysdeps/x86_64/memset.S (VDUP_TO_VEC0_AND_SET_RETURN): Renamed to MEMSET_VDUP_TO_VEC0_AND_SET_RETURN. (WMEMSET_VDUP_TO_VEC0_AND_SET_RETURN): New. (WMEMSET_CHK_SYMBOL): Likewise. (WMEMSET_SYMBOL): Likewise. (__wmemset): Add hidden definition. (wmemset): Add weak hidden definition. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add wmemset_chk-nonshared. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add __wmemset_sse2_unaligned, __wmemset_avx2_unaligned, __wmemset_avx512_unaligned, __wmemset_chk_sse2_unaligned, __wmemset_chk_avx2_unaligned and __wmemset_chk_avx512_unaligned. * sysdeps/x86_64/multiarch/memset-avx2-unaligned-erms.S (VDUP_TO_VEC0_AND_SET_RETURN): Renamed to ... (MEMSET_VDUP_TO_VEC0_AND_SET_RETURN): This. (WMEMSET_VDUP_TO_VEC0_AND_SET_RETURN): New. (WMEMSET_SYMBOL): Likewise. * sysdeps/x86_64/multiarch/memset-avx512-unaligned-erms.S (VDUP_TO_VEC0_AND_SET_RETURN): Renamed to ... (MEMSET_VDUP_TO_VEC0_AND_SET_RETURN): This. (WMEMSET_VDUP_TO_VEC0_AND_SET_RETURN): New. (WMEMSET_SYMBOL): Likewise. * sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S: Updated. (WMEMSET_CHK_SYMBOL): New. (WMEMSET_CHK_SYMBOL (__wmemset_chk, unaligned)): Likewise. (WMEMSET_SYMBOL (__wmemset, unaligned)): Likewise. * sysdeps/x86_64/multiarch/memset.S (WMEMSET_SYMBOL): New. (libc_hidden_builtin_def): Also define __GI_wmemset and __GI___wmemset. (weak_alias): New. * sysdeps/x86_64/multiarch/wmemset.c: New file. * sysdeps/x86_64/multiarch/wmemset.h: Likewise. * sysdeps/x86_64/multiarch/wmemset_chk-nonshared.S: Likewise. * sysdeps/x86_64/multiarch/wmemset_chk.c: Likewise. * sysdeps/x86_64/wmemset.c: Likewise. * sysdeps/x86_64/wmemset_chk.c: Likewise.
Diffstat (limited to 'sysdeps/x86_64/multiarch/memset-avx512-unaligned-erms.S')
-rw-r--r-- | sysdeps/x86_64/multiarch/memset-avx512-unaligned-erms.S | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sysdeps/x86_64/multiarch/memset-avx512-unaligned-erms.S b/sysdeps/x86_64/multiarch/memset-avx512-unaligned-erms.S index a5ec349198..0783979ca5 100644 --- a/sysdeps/x86_64/multiarch/memset-avx512-unaligned-erms.S +++ b/sysdeps/x86_64/multiarch/memset-avx512-unaligned-erms.S @@ -4,14 +4,21 @@ # define VMOVU vmovdqu64 # define VMOVA vmovdqa64 -# define VDUP_TO_VEC0_AND_SET_RETURN(d, r) \ +# define MEMSET_VDUP_TO_VEC0_AND_SET_RETURN(d, r) \ vmovd d, %xmm0; \ movq r, %rax; \ vpbroadcastb %xmm0, %xmm0; \ vpbroadcastq %xmm0, %zmm0 +# define WMEMSET_VDUP_TO_VEC0_AND_SET_RETURN(d, r) \ + vmovd d, %xmm0; \ + movq r, %rax; \ + vpbroadcastd %xmm0, %xmm0; \ + vpbroadcastq %xmm0, %zmm0 + # define SECTION(p) p##.avx512 # define MEMSET_SYMBOL(p,s) p##_avx512_##s +# define WMEMSET_SYMBOL(p,s) p##_avx512_##s # include "memset-vec-unaligned-erms.S" #endif |