From: "H.J. Lu" <hjl.tools@gmail.com>
To: libc-alpha@sourceware.org
Subject: [PATCH v2 04/10] x86-64: Add memmove family functions with 256-bit EVEX
Date: Mon, 15 Mar 2021 07:25:14 -0700 [thread overview]
Message-ID: <20210315142520.1661407-5-hjl.tools@gmail.com> (raw)
In-Reply-To: <20210315142520.1661407-1-hjl.tools@gmail.com>
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.
---
sysdeps/x86_64/multiarch/Makefile | 1 +
sysdeps/x86_64/multiarch/ifunc-impl-list.c | 36 +++++++++++++++++++
sysdeps/x86_64/multiarch/ifunc-memmove.h | 21 +++++++++--
.../multiarch/memmove-evex-unaligned-erms.S | 33 +++++++++++++++++
.../multiarch/memmove-vec-unaligned-erms.S | 24 ++++++++-----
5 files changed, 104 insertions(+), 11 deletions(-)
create mode 100644 sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S
diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile
index 46783cd14b..4563fc56f5 100644
--- a/sysdeps/x86_64/multiarch/Makefile
+++ b/sysdeps/x86_64/multiarch/Makefile
@@ -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 \
diff --git a/sysdeps/x86_64/multiarch/ifunc-impl-list.c b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
index 74b20d8bd1..e1c39d58d6 100644
--- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
@@ -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),
diff --git a/sysdeps/x86_64/multiarch/ifunc-memmove.h b/sysdeps/x86_64/multiarch/ifunc-memmove.h
index bf42a555dc..517b332bfc 100644
--- a/sysdeps/x86_64/multiarch/ifunc-memmove.h
+++ b/sysdeps/x86_64/multiarch/ifunc-memmove.h
@@ -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 (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);
+ return OPTIMIZE (avx_unaligned);
+ }
}
if (!CPU_FEATURE_USABLE_P (cpu_features, SSSE3)
diff --git a/sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S
new file mode 100644
index 0000000000..0cbce8f944
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S
@@ -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
diff --git a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
index 50bb1fccb2..d713d7d679 100644
--- a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
+++ b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
@@ -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):
--
2.30.2
next prev parent reply other threads:[~2021-03-15 14:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 14:25 [PATCH v2 00/10] x86-64: Avoid RTM abort inside a RTM region H.J. Lu
2021-03-15 14:25 ` [PATCH v2 01/10] x86: Set Prefer_No_VZEROUPPER and add Prefer_AVX2_STRCMP H.J. Lu
2021-03-15 14:25 ` [PATCH v2 02/10] x86-64: Add ifunc-avx2.h functions with 256-bit EVEX H.J. Lu
2021-03-15 14:25 ` [PATCH v2 03/10] x86-64: Add strcpy family " H.J. Lu
2021-03-15 14:25 ` H.J. Lu [this message]
2021-03-15 14:25 ` [PATCH v2 05/10] x86-64: Add memset " H.J. Lu
2021-03-15 14:25 ` [PATCH v2 06/10] x86-64: Add memcmp " H.J. Lu
2021-03-15 14:25 ` [PATCH v2 07/10] x86-64: Add AVX optimized string/memory functions for RTM H.J. Lu
2021-03-15 14:25 ` [PATCH v2 08/10] x86: Add string/memory function tests in RTM region H.J. Lu
2021-03-15 14:25 ` [PATCH v2 09/10] x86-64: Use ZMM16-ZMM31 in AVX512 memset family functions H.J. Lu
2021-03-15 14:25 ` [PATCH v2 10/10] x86-64: Use ZMM16-ZMM31 in AVX512 memmove " H.J. Lu
2021-03-24 18:03 ` [PATCH v2 00/10] x86-64: Avoid RTM abort inside a RTM region H.J. Lu
2021-03-29 23:06 ` H.J. Lu
2022-01-27 17:13 ` H.J. Lu
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