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x86-64: Add memmove family functions with 256-bit EVEX

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Update ifunc-memmove.h to select the function optimized with 256-bit EVEX
instructions using YMM16-YMM31 registers to avoid RTM abort with usable
AVX512VL since VZEROUPPER isn't needed at function exit.
This commit is contained in:
H.J. Lu 2021-03-05 06:46:08 -08:00
parent 525bc2a32c
commit 63ad43566f
5 changed files with 104 additions and 11 deletions
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1
sysdeps/x86_64/multiarch/Makefile
View File

@ -41,6 +41,7 @@ sysdep_routines += strncat-c stpncpy-c strncpy-c \
memset-avx2-unaligned-erms \
memset-avx512-unaligned-erms \
memchr-evex \
memmove-evex-unaligned-erms \
memrchr-evex \
rawmemchr-evex \
stpcpy-evex \

36
sysdeps/x86_64/multiarch/ifunc-impl-list.c
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@ -80,6 +80,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, __memmove_chk,
CPU_FEATURE_USABLE (AVX),
__memmove_chk_avx_unaligned_erms)
IFUNC_IMPL_ADD (array, i, __memmove_chk,
CPU_FEATURE_USABLE (AVX512VL),
__memmove_chk_evex_unaligned)
IFUNC_IMPL_ADD (array, i, __memmove_chk,
CPU_FEATURE_USABLE (AVX512VL),
__memmove_chk_evex_unaligned_erms)
IFUNC_IMPL_ADD (array, i, __memmove_chk,
CPU_FEATURE_USABLE (SSSE3),
__memmove_chk_ssse3_back)
@ -102,6 +108,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, memmove,
CPU_FEATURE_USABLE (AVX),
__memmove_avx_unaligned_erms)
IFUNC_IMPL_ADD (array, i, memmove,
CPU_FEATURE_USABLE (AVX512VL),
__memmove_evex_unaligned)
IFUNC_IMPL_ADD (array, i, memmove,
CPU_FEATURE_USABLE (AVX512VL),
__memmove_evex_unaligned_erms)
IFUNC_IMPL_ADD (array, i, memmove,
CPU_FEATURE_USABLE (AVX512F),
__memmove_avx512_no_vzeroupper)
@ -565,6 +577,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, __memcpy_chk,
CPU_FEATURE_USABLE (AVX),
__memcpy_chk_avx_unaligned_erms)
IFUNC_IMPL_ADD (array, i, __memcpy_chk,
CPU_FEATURE_USABLE (AVX512VL),
__memcpy_chk_evex_unaligned)
IFUNC_IMPL_ADD (array, i, __memcpy_chk,
CPU_FEATURE_USABLE (AVX512VL),
__memcpy_chk_evex_unaligned_erms)
IFUNC_IMPL_ADD (array, i, __memcpy_chk,
CPU_FEATURE_USABLE (SSSE3),
__memcpy_chk_ssse3_back)
@ -587,6 +605,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, memcpy,
CPU_FEATURE_USABLE (AVX),
__memcpy_avx_unaligned_erms)
IFUNC_IMPL_ADD (array, i, memcpy,
CPU_FEATURE_USABLE (AVX512VL),
__memcpy_evex_unaligned)
IFUNC_IMPL_ADD (array, i, memcpy,
CPU_FEATURE_USABLE (AVX512VL),
__memcpy_evex_unaligned_erms)
IFUNC_IMPL_ADD (array, i, memcpy, CPU_FEATURE_USABLE (SSSE3),
__memcpy_ssse3_back)
IFUNC_IMPL_ADD (array, i, memcpy, CPU_FEATURE_USABLE (SSSE3),
@ -623,6 +647,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
CPU_FEATURE_USABLE (AVX),
__mempcpy_chk_avx_unaligned_erms)
IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
CPU_FEATURE_USABLE (AVX512VL),
__mempcpy_chk_evex_unaligned)
IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
CPU_FEATURE_USABLE (AVX512VL),
__mempcpy_chk_evex_unaligned_erms)
IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
CPU_FEATURE_USABLE (SSSE3),
__mempcpy_chk_ssse3_back)
@ -654,6 +684,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_IMPL_ADD (array, i, mempcpy,
CPU_FEATURE_USABLE (AVX),
__mempcpy_avx_unaligned_erms)
IFUNC_IMPL_ADD (array, i, mempcpy,
CPU_FEATURE_USABLE (AVX512VL),
__mempcpy_evex_unaligned)
IFUNC_IMPL_ADD (array, i, mempcpy,
CPU_FEATURE_USABLE (AVX512VL),
__mempcpy_evex_unaligned_erms)
IFUNC_IMPL_ADD (array, i, mempcpy, CPU_FEATURE_USABLE (SSSE3),
__mempcpy_ssse3_back)
IFUNC_IMPL_ADD (array, i, mempcpy, CPU_FEATURE_USABLE (SSSE3),

21
sysdeps/x86_64/multiarch/ifunc-memmove.h
View File

@ -29,6 +29,10 @@ extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3_back) attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (avx_unaligned) attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (avx_unaligned_erms)
attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (evex_unaligned)
attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (evex_unaligned_erms)
attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned)
attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned_erms)
@ -59,10 +63,21 @@ IFUNC_SELECTOR (void)
if (CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load))
{
if (CPU_FEATURE_USABLE_P (cpu_features, ERMS))
return OPTIMIZE (avx_unaligned_erms);
if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL))
{
if (CPU_FEATURE_USABLE_P (cpu_features, ERMS))
return OPTIMIZE (evex_unaligned_erms);
return OPTIMIZE (avx_unaligned);
return OPTIMIZE (evex_unaligned);
}
if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER))
{
if (CPU_FEATURE_USABLE_P (cpu_features, ERMS))
return OPTIMIZE (avx_unaligned_erms);
return OPTIMIZE (avx_unaligned);
}
}
if (!CPU_FEATURE_USABLE_P (cpu_features, SSSE3)

33
sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S Normal file
View File

@ -0,0 +1,33 @@
#if IS_IN (libc)
# define VEC_SIZE 32
# define XMM0 xmm16
# define XMM1 xmm17
# define YMM0 ymm16
# define YMM1 ymm17
# define VEC0 ymm16
# define VEC1 ymm17
# define VEC2 ymm18
# define VEC3 ymm19
# define VEC4 ymm20
# define VEC5 ymm21
# define VEC6 ymm22
# define VEC7 ymm23
# define VEC8 ymm24
# define VEC9 ymm25
# define VEC10 ymm26
# define VEC11 ymm27
# define VEC12 ymm28
# define VEC13 ymm29
# define VEC14 ymm30
# define VEC15 ymm31
# define VEC(i) VEC##i
# define VMOVNT vmovntdq
# define VMOVU vmovdqu64
# define VMOVA vmovdqa64
# define VZEROUPPER
# define SECTION(p) p##.evex
# define MEMMOVE_SYMBOL(p,s) p##_evex_##s
# include "memmove-vec-unaligned-erms.S"
#endif

24
sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
View File

@ -51,6 +51,14 @@
# define MEMMOVE_CHK_SYMBOL(p,s) MEMMOVE_SYMBOL(p, s)
#endif
#ifndef XMM0
# define XMM0 xmm0
#endif
#ifndef YMM0
# define YMM0 ymm0
#endif
#ifndef VZEROUPPER
# if VEC_SIZE > 16
# define VZEROUPPER vzeroupper
@ -301,20 +309,20 @@ L(less_vec):
#if VEC_SIZE > 32
L(between_32_63):
/* From 32 to 63. No branch when size == 32. */
vmovdqu (%rsi), %ymm0
vmovdqu -32(%rsi,%rdx), %ymm1
vmovdqu %ymm0, (%rdi)
vmovdqu %ymm1, -32(%rdi,%rdx)
VMOVU (%rsi), %YMM0
VMOVU -32(%rsi,%rdx), %YMM1
VMOVU %YMM0, (%rdi)
VMOVU %YMM1, -32(%rdi,%rdx)
VZEROUPPER
ret
#endif
#if VEC_SIZE > 16
/* From 16 to 31. No branch when size == 16. */
L(between_16_31):
vmovdqu (%rsi), %xmm0
vmovdqu -16(%rsi,%rdx), %xmm1
vmovdqu %xmm0, (%rdi)
vmovdqu %xmm1, -16(%rdi,%rdx)
VMOVU (%rsi), %XMM0
VMOVU -16(%rsi,%rdx), %XMM1
VMOVU %XMM0, (%rdi)
VMOVU %XMM1, -16(%rdi,%rdx)
ret
#endif
L(between_8_15):