[V1] x86-64: Optimize strcat/strncat, strcpy/strncpy and stpcpy/stpncpy with AVX2

Message ID 20190107202122.23215-1-leonardo.sandoval.gonzalez@linux.intel.com
State New
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  • [V1] x86-64: Optimize strcat/strncat, strcpy/strncpy and stpcpy/stpncpy with AVX2
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Commit Message

Leonardo Sandoval Jan. 7, 2019, 8:21 p.m.
From: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>

Optimize x86-64 strcat/strncat, strcpy/strncpy and stpcpy/stpncpy with AVX2.
It uses vector comparison as much as possible. In general, the larger the
source string, the greater performance gain observed, reaching speedups of
1.6x compared to SSE2 unaligned routines. Select AVX2 strcat/strncat,
strcpy/strncpy and stpcpy/stpncpy on AVX2 machines where vzeroupper is
preferred and AVX unaligned load is fast.

	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
	strcat-avx2, strncat-avx2, strcpy-avx2, strncpy-avx2,
	stpcpy-avx2 and stpncpy-avx2.
	* sysdeps/x86_64/multiarch/ifunc-impl-list.c:
	(__libc_ifunc_impl_list): Add tests for __strcat_avx2,
	__strncat_avx2, __strcpy_avx2, __strncpy_avx2, __stpcpy_avx2
	and __stpncpy_avx2.
	* sysdeps/x86_64/multiarch/{ifunc-unaligned-ssse3.h =>
	ifunc-strcpy.h}: rename header for a more generic name.
	* sysdeps/x86_64/multiarch/ifunc-strcpy.h:
	(IFUNC_SELECTOR): Return OPTIMIZE (avx2) on AVX 2 machines if
	AVX unaligned load is fast and vzeroupper is preferred.
	* sysdeps/x86_64/multiarch/stpcpy-avx2.S: New file
	* sysdeps/x86_64/multiarch/stpncpy-avx2.S: Likewise
	* sysdeps/x86_64/multiarch/strcat-avx2.S: Likewise
	* sysdeps/x86_64/multiarch/strcpy-avx2.S: Likewise
	* sysdeps/x86_64/multiarch/strncat-avx2.S: Likewise
	* sysdeps/x86_64/multiarch/strncpy-avx2.S: Likewise
---

NOTE: This patch is the same as [V1] (so effectively resending it, sorry for spamming) but the intention
is to make things clear and see if it can now be merged into master: as suggested V1's comments,
I went to implement V2 [V2] using generic routines but found out that performance is not as good as
[3]. The latter are plots computing speed-ups between SSE2 Unaligned versus V1 and SS2 Unaligned versus V2.
So numbers >1 are speedups, not regressions. V1 curve is most of the times >=1 and above V2, meaning better
performance compared to SS2 Unaligned and compare to V2.

[V1] https://patchwork.ozlabs.org/patch/980578/
[V2] https://patchwork.ozlabs.org/patch/1008490/
[3] https://github.com/lsandoval/strcpy-comparison/blob/master/speedup-v1-v2.png

 sysdeps/x86_64/multiarch/Makefile             |    3 +
 sysdeps/x86_64/multiarch/ifunc-impl-list.c    |   12 +
 ...ifunc-unaligned-ssse3.h => ifunc-strcpy.h} |    6 +
 sysdeps/x86_64/multiarch/stpcpy-avx2.S        |    3 +
 sysdeps/x86_64/multiarch/stpcpy.c             |    2 +-
 sysdeps/x86_64/multiarch/stpncpy-avx2.S       |    4 +
 sysdeps/x86_64/multiarch/stpncpy.c            |    2 +-
 sysdeps/x86_64/multiarch/strcat-avx2.S        |  275 +++++
 sysdeps/x86_64/multiarch/strcat.c             |    2 +-
 sysdeps/x86_64/multiarch/strcpy-avx2.S        | 1022 +++++++++++++++++
 sysdeps/x86_64/multiarch/strcpy.c             |    2 +-
 sysdeps/x86_64/multiarch/strncat-avx2.S       |    3 +
 sysdeps/x86_64/multiarch/strncat.c            |    2 +-
 sysdeps/x86_64/multiarch/strncpy-avx2.S       |    3 +
 sysdeps/x86_64/multiarch/strncpy.c            |    2 +-
 15 files changed, 1337 insertions(+), 6 deletions(-)
 rename sysdeps/x86_64/multiarch/{ifunc-unaligned-ssse3.h => ifunc-strcpy.h} (83%)
 create mode 100644 sysdeps/x86_64/multiarch/stpcpy-avx2.S
 create mode 100644 sysdeps/x86_64/multiarch/stpncpy-avx2.S
 create mode 100644 sysdeps/x86_64/multiarch/strcat-avx2.S
 create mode 100644 sysdeps/x86_64/multiarch/strcpy-avx2.S
 create mode 100644 sysdeps/x86_64/multiarch/strncat-avx2.S
 create mode 100644 sysdeps/x86_64/multiarch/strncpy-avx2.S

Comments

H.J. Lu Jan. 10, 2019, 6:29 p.m. | #1
On Mon, Jan 7, 2019 at 12:21 PM
<leonardo.sandoval.gonzalez@linux.intel.com> wrote:
>
> From: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>
>
> Optimize x86-64 strcat/strncat, strcpy/strncpy and stpcpy/stpncpy with AVX2.
> It uses vector comparison as much as possible. In general, the larger the
> source string, the greater performance gain observed, reaching speedups of
> 1.6x compared to SSE2 unaligned routines. Select AVX2 strcat/strncat,
> strcpy/strncpy and stpcpy/stpncpy on AVX2 machines where vzeroupper is
> preferred and AVX unaligned load is fast.
>
>         * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
>         strcat-avx2, strncat-avx2, strcpy-avx2, strncpy-avx2,
>         stpcpy-avx2 and stpncpy-avx2.
>         * sysdeps/x86_64/multiarch/ifunc-impl-list.c:
>         (__libc_ifunc_impl_list): Add tests for __strcat_avx2,
>         __strncat_avx2, __strcpy_avx2, __strncpy_avx2, __stpcpy_avx2
>         and __stpncpy_avx2.
>         * sysdeps/x86_64/multiarch/{ifunc-unaligned-ssse3.h =>
>         ifunc-strcpy.h}: rename header for a more generic name.
>         * sysdeps/x86_64/multiarch/ifunc-strcpy.h:
>         (IFUNC_SELECTOR): Return OPTIMIZE (avx2) on AVX 2 machines if
>         AVX unaligned load is fast and vzeroupper is preferred.
>         * sysdeps/x86_64/multiarch/stpcpy-avx2.S: New file
>         * sysdeps/x86_64/multiarch/stpncpy-avx2.S: Likewise
>         * sysdeps/x86_64/multiarch/strcat-avx2.S: Likewise
>         * sysdeps/x86_64/multiarch/strcpy-avx2.S: Likewise
>         * sysdeps/x86_64/multiarch/strncat-avx2.S: Likewise
>         * sysdeps/x86_64/multiarch/strncpy-avx2.S: Likewise
> ---
>
> NOTE: This patch is the same as [V1] (so effectively resending it, sorry for spamming) but the intention
> is to make things clear and see if it can now be merged into master: as suggested V1's comments,
> I went to implement V2 [V2] using generic routines but found out that performance is not as good as
> [3]. The latter are plots computing speed-ups between SSE2 Unaligned versus V1 and SS2 Unaligned versus V2.
> So numbers >1 are speedups, not regressions. V1 curve is most of the times >=1 and above V2, meaning better
> performance compared to SS2 Unaligned and compare to V2.
>
> [V1] https://patchwork.ozlabs.org/patch/980578/
> [V2] https://patchwork.ozlabs.org/patch/1008490/
> [3] https://github.com/lsandoval/strcpy-comparison/blob/master/speedup-v1-v2.png
>

LGTM.

Thanks.

Patch

diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile
index bb5e970735..395e432c09 100644
--- a/sysdeps/x86_64/multiarch/Makefile
+++ b/sysdeps/x86_64/multiarch/Makefile
@@ -24,11 +24,14 @@  sysdep_routines += strncat-c stpncpy-c strncpy-c \
 		   strchr-sse2 strchrnul-sse2 strchr-avx2 strchrnul-avx2 \
 		   strrchr-sse2 strrchr-avx2 \
 		   strlen-sse2 strnlen-sse2 strlen-avx2 strnlen-avx2 \
+		   strcat-avx2 strncat-avx2 \
 		   strcat-ssse3 strncat-ssse3\
+		   strcpy-avx2 strncpy-avx2 \
 		   strcpy-sse2 stpcpy-sse2 \
 		   strcpy-ssse3 strncpy-ssse3 stpcpy-ssse3 stpncpy-ssse3 \
 		   strcpy-sse2-unaligned strncpy-sse2-unaligned \
 		   stpcpy-sse2-unaligned stpncpy-sse2-unaligned \
+		   stpcpy-avx2 stpncpy-avx2 \
 		   strcat-sse2 \
 		   strcat-sse2-unaligned strncat-sse2-unaligned \
 		   strchr-sse2-no-bsf memcmp-ssse3 strstr-sse2-unaligned \
diff --git a/sysdeps/x86_64/multiarch/ifunc-impl-list.c b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
index cee2aebaee..cbf6614280 100644
--- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
@@ -199,6 +199,8 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_IMPL (i, name, stpncpy,
 	      IFUNC_IMPL_ADD (array, i, stpncpy, HAS_CPU_FEATURE (SSSE3),
 			      __stpncpy_ssse3)
+	      IFUNC_IMPL_ADD (array, i, stpncpy, HAS_ARCH_FEATURE (AVX2_Usable),
+			      __stpncpy_avx2)
 	      IFUNC_IMPL_ADD (array, i, stpncpy, 1,
 			      __stpncpy_sse2_unaligned)
 	      IFUNC_IMPL_ADD (array, i, stpncpy, 1, __stpncpy_sse2))
@@ -207,6 +209,8 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_IMPL (i, name, stpcpy,
 	      IFUNC_IMPL_ADD (array, i, stpcpy, HAS_CPU_FEATURE (SSSE3),
 			      __stpcpy_ssse3)
+	      IFUNC_IMPL_ADD (array, i, stpcpy, HAS_ARCH_FEATURE (AVX2_Usable),
+			      __stpcpy_avx2)
 	      IFUNC_IMPL_ADD (array, i, stpcpy, 1, __stpcpy_sse2_unaligned)
 	      IFUNC_IMPL_ADD (array, i, stpcpy, 1, __stpcpy_sse2))
 
@@ -239,6 +243,8 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 
   /* Support sysdeps/x86_64/multiarch/strcat.c.  */
   IFUNC_IMPL (i, name, strcat,
+	      IFUNC_IMPL_ADD (array, i, strcat, HAS_ARCH_FEATURE (AVX2_Usable),
+			      __strcat_avx2)
 	      IFUNC_IMPL_ADD (array, i, strcat, HAS_CPU_FEATURE (SSSE3),
 			      __strcat_ssse3)
 	      IFUNC_IMPL_ADD (array, i, strcat, 1, __strcat_sse2_unaligned)
@@ -280,6 +286,8 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 
   /* Support sysdeps/x86_64/multiarch/strcpy.c.  */
   IFUNC_IMPL (i, name, strcpy,
+	      IFUNC_IMPL_ADD (array, i, strcpy, HAS_ARCH_FEATURE (AVX2_Usable),
+			      __strcpy_avx2)
 	      IFUNC_IMPL_ADD (array, i, strcpy, HAS_CPU_FEATURE (SSSE3),
 			      __strcpy_ssse3)
 	      IFUNC_IMPL_ADD (array, i, strcpy, 1, __strcpy_sse2_unaligned)
@@ -321,6 +329,8 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 
   /* Support sysdeps/x86_64/multiarch/strncat.c.  */
   IFUNC_IMPL (i, name, strncat,
+	      IFUNC_IMPL_ADD (array, i, strncat, HAS_ARCH_FEATURE (AVX2_Usable),
+			      __strncat_avx2)
 	      IFUNC_IMPL_ADD (array, i, strncat, HAS_CPU_FEATURE (SSSE3),
 			      __strncat_ssse3)
 	      IFUNC_IMPL_ADD (array, i, strncat, 1,
@@ -329,6 +339,8 @@  __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 
   /* Support sysdeps/x86_64/multiarch/strncpy.c.  */
   IFUNC_IMPL (i, name, strncpy,
+	      IFUNC_IMPL_ADD (array, i, strncpy, HAS_ARCH_FEATURE (AVX2_Usable),
+ 			      __strncpy_avx2)
 	      IFUNC_IMPL_ADD (array, i, strncpy, HAS_CPU_FEATURE (SSSE3),
 			      __strncpy_ssse3)
 	      IFUNC_IMPL_ADD (array, i, strncpy, 1,
diff --git a/sysdeps/x86_64/multiarch/ifunc-unaligned-ssse3.h b/sysdeps/x86_64/multiarch/ifunc-strcpy.h
similarity index 83%
rename from sysdeps/x86_64/multiarch/ifunc-unaligned-ssse3.h
rename to sysdeps/x86_64/multiarch/ifunc-strcpy.h
index 4ddca9f15f..bc6a70fc7c 100644
--- a/sysdeps/x86_64/multiarch/ifunc-unaligned-ssse3.h
+++ b/sysdeps/x86_64/multiarch/ifunc-strcpy.h
@@ -24,12 +24,18 @@  extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned)
   attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden;
 
 static inline void *
 IFUNC_SELECTOR (void)
 {
   const struct cpu_features* cpu_features = __get_cpu_features ();
 
+  if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER)
+      && CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable)
+      && CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load))
+    return OPTIMIZE (avx2);
+
   if (CPU_FEATURES_ARCH_P (cpu_features, Fast_Unaligned_Load))
     return OPTIMIZE (sse2_unaligned);
 
diff --git a/sysdeps/x86_64/multiarch/stpcpy-avx2.S b/sysdeps/x86_64/multiarch/stpcpy-avx2.S
new file mode 100644
index 0000000000..f0bd3029fe
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/stpcpy-avx2.S
@@ -0,0 +1,3 @@ 
+#define USE_AS_STPCPY
+#define STRCPY __stpcpy_avx2
+#include "strcpy-avx2.S"
diff --git a/sysdeps/x86_64/multiarch/stpcpy.c b/sysdeps/x86_64/multiarch/stpcpy.c
index 0b12f5d7a1..fabe03204b 100644
--- a/sysdeps/x86_64/multiarch/stpcpy.c
+++ b/sysdeps/x86_64/multiarch/stpcpy.c
@@ -28,7 +28,7 @@ 
 # undef __stpcpy
 
 # define SYMBOL_NAME stpcpy
-# include "ifunc-unaligned-ssse3.h"
+# include "ifunc-strcpy.h"
 
 libc_ifunc_redirected (__redirect_stpcpy, __stpcpy, IFUNC_SELECTOR ());
 
diff --git a/sysdeps/x86_64/multiarch/stpncpy-avx2.S b/sysdeps/x86_64/multiarch/stpncpy-avx2.S
new file mode 100644
index 0000000000..032b0407d0
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/stpncpy-avx2.S
@@ -0,0 +1,4 @@ 
+#define USE_AS_STPCPY
+#define USE_AS_STRNCPY
+#define STRCPY __stpncpy_avx2
+#include "strcpy-avx2.S"
diff --git a/sysdeps/x86_64/multiarch/stpncpy.c b/sysdeps/x86_64/multiarch/stpncpy.c
index 71edc291e4..3b618e7491 100644
--- a/sysdeps/x86_64/multiarch/stpncpy.c
+++ b/sysdeps/x86_64/multiarch/stpncpy.c
@@ -26,7 +26,7 @@ 
 # undef __stpncpy
 
 # define SYMBOL_NAME stpncpy
-# include "ifunc-unaligned-ssse3.h"
+# include "ifunc-strcpy.h"
 
 libc_ifunc_redirected (__redirect_stpncpy, __stpncpy, IFUNC_SELECTOR ());
 
diff --git a/sysdeps/x86_64/multiarch/strcat-avx2.S b/sysdeps/x86_64/multiarch/strcat-avx2.S
new file mode 100644
index 0000000000..b062356427
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/strcat-avx2.S
@@ -0,0 +1,275 @@ 
+/* strcat with AVX2
+   Copyright (C) 2011-2018 Free Software Foundation, Inc.
+   Contributed by Intel Corporation.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#if IS_IN (libc)
+
+# include <sysdep.h>
+
+# ifndef STRCAT
+#  define STRCAT  __strcat_avx2
+# endif
+
+# define USE_AS_STRCAT
+
+/* Number of bytes in a vector register */
+# define VEC_SIZE	32
+
+	.section .text.avx,"ax",@progbits
+ENTRY (STRCAT)
+	mov	%rdi, %r9
+# ifdef USE_AS_STRNCAT
+	mov	%rdx, %r8
+# endif
+
+	xor	%eax, %eax
+	mov	%edi, %ecx
+	and	$((VEC_SIZE * 4) - 1), %ecx
+	vpxor	%xmm6, %xmm6, %xmm6
+	cmp	$(VEC_SIZE * 3), %ecx
+	ja	L(fourth_vector_boundary)
+	vpcmpeqb (%rdi), %ymm6, %ymm0
+	vpmovmskb %ymm0, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_first_vector)
+	mov	%rdi, %rax
+	and	$-VEC_SIZE, %rax
+	jmp	L(align_vec_size_start)
+L(fourth_vector_boundary):
+	mov	%rdi, %rax
+	and	$-VEC_SIZE, %rax
+	vpcmpeqb	(%rax), %ymm6, %ymm0
+	mov	$-1, %r10d
+	sub	%rax, %rcx
+	shl	%cl, %r10d
+	vpmovmskb %ymm0, %edx
+	and	%r10d, %edx
+	jnz	L(exit)
+
+L(align_vec_size_start):
+	vpcmpeqb VEC_SIZE(%rax), %ymm6, %ymm0
+	vpmovmskb %ymm0, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_second_vector)
+
+	vpcmpeqb (VEC_SIZE * 2)(%rax), %ymm6, %ymm1
+	vpmovmskb %ymm1, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_third_vector)
+
+	vpcmpeqb (VEC_SIZE * 3)(%rax), %ymm6, %ymm2
+	vpmovmskb %ymm2, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fourth_vector)
+
+	vpcmpeqb (VEC_SIZE * 4)(%rax), %ymm6, %ymm3
+	vpmovmskb %ymm3, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fifth_vector)
+
+	vpcmpeqb (VEC_SIZE * 5)(%rax), %ymm6, %ymm0
+	add	$(VEC_SIZE * 4), %rax
+	vpmovmskb %ymm0, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_second_vector)
+
+	vpcmpeqb (VEC_SIZE * 2)(%rax), %ymm6, %ymm1
+	vpmovmskb %ymm1, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_third_vector)
+
+	vpcmpeqb (VEC_SIZE * 3)(%rax), %ymm6, %ymm2
+	vpmovmskb %ymm2, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fourth_vector)
+
+	vpcmpeqb (VEC_SIZE * 4)(%rax), %ymm6, %ymm3
+	vpmovmskb %ymm3, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fifth_vector)
+
+	vpcmpeqb (VEC_SIZE * 5)(%rax), %ymm6, %ymm0
+	add	$(VEC_SIZE * 4), %rax
+	vpmovmskb %ymm0, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_second_vector)
+
+	vpcmpeqb (VEC_SIZE * 2)(%rax), %ymm6, %ymm1
+	vpmovmskb %ymm1, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_third_vector)
+
+	vpcmpeqb (VEC_SIZE * 3)(%rax), %ymm6, %ymm2
+	vpmovmskb %ymm2, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fourth_vector)
+
+	vpcmpeqb (VEC_SIZE * 4)(%rax), %ymm6, %ymm3
+	vpmovmskb %ymm3, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fifth_vector)
+
+	vpcmpeqb (VEC_SIZE * 5)(%rax), %ymm6, %ymm0
+	add	$(VEC_SIZE * 4), %rax
+	vpmovmskb %ymm0, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_second_vector)
+
+	vpcmpeqb (VEC_SIZE * 2)(%rax), %ymm6, %ymm1
+	vpmovmskb %ymm1, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_third_vector)
+
+	vpcmpeqb (VEC_SIZE * 3)(%rax), %ymm6, %ymm2
+	vpmovmskb %ymm2, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fourth_vector)
+
+	vpcmpeqb (VEC_SIZE * 4)(%rax), %ymm6, %ymm3
+	vpmovmskb %ymm3, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fifth_vector)
+
+	test	$((VEC_SIZE * 4) - 1), %rax
+	jz	L(align_four_vec_loop)
+
+	vpcmpeqb (VEC_SIZE * 5)(%rax), %ymm6, %ymm0
+	add	$(VEC_SIZE * 5), %rax
+	vpmovmskb %ymm0, %edx
+	test	%edx, %edx
+	jnz	L(exit)
+
+	test	$((VEC_SIZE * 4) - 1), %rax
+	jz	L(align_four_vec_loop)
+
+	vpcmpeqb VEC_SIZE(%rax), %ymm6, %ymm1
+	add	$VEC_SIZE, %rax
+	vpmovmskb %ymm1, %edx
+	test	%edx, %edx
+	jnz	L(exit)
+
+	test	$((VEC_SIZE * 4) - 1), %rax
+	jz	L(align_four_vec_loop)
+
+	vpcmpeqb VEC_SIZE(%rax), %ymm6, %ymm2
+	add	$VEC_SIZE, %rax
+	vpmovmskb %ymm2, %edx
+	test	%edx, %edx
+	jnz	L(exit)
+
+	test	$((VEC_SIZE * 4) - 1), %rax
+	jz	L(align_four_vec_loop)
+
+	vpcmpeqb VEC_SIZE(%rax), %ymm6, %ymm3
+	add	$VEC_SIZE, %rax
+	vpmovmskb %ymm3, %edx
+	test	%edx, %edx
+	jnz	L(exit)
+
+	add	$VEC_SIZE, %rax
+
+	.p2align 4
+L(align_four_vec_loop):
+	vmovaps	(%rax),	%ymm4
+	vpminub	VEC_SIZE(%rax),	%ymm4, %ymm4
+	vmovaps	(VEC_SIZE * 2)(%rax),	%ymm5
+	vpminub	(VEC_SIZE * 3)(%rax),	%ymm5, %ymm5
+	add	$(VEC_SIZE * 4),	%rax
+	vpminub	%ymm4,	%ymm5, %ymm5
+	vpcmpeqb %ymm5,	%ymm6, %ymm5
+	vpmovmskb %ymm5,	%edx
+	test	%edx,	%edx
+	jz	L(align_four_vec_loop)
+
+	vpcmpeqb -(VEC_SIZE * 4)(%rax), %ymm6, %ymm0
+	sub	$(VEC_SIZE * 5),	%rax
+	vpmovmskb %ymm0, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_second_vector)
+
+	vpcmpeqb (VEC_SIZE * 2)(%rax), %ymm6, %ymm1
+	vpmovmskb %ymm1, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_third_vector)
+
+	vpcmpeqb (VEC_SIZE * 3)(%rax), %ymm6, %ymm2
+	vpmovmskb %ymm2, %edx
+	test	%edx, %edx
+	jnz	L(exit_null_on_fourth_vector)
+
+	vpcmpeqb (VEC_SIZE * 4)(%rax), %ymm6, %ymm3
+	vpmovmskb %ymm3, %edx
+	sub	%rdi, %rax
+	bsf	%rdx, %rdx
+	add	%rdx, %rax
+	add	$(VEC_SIZE * 4), %rax
+	jmp	L(StartStrcpyPart)
+
+	.p2align 4
+L(exit):
+	sub	%rdi, %rax
+L(exit_null_on_first_vector):
+	bsf	%rdx, %rdx
+	add	%rdx, %rax
+	jmp	L(StartStrcpyPart)
+
+	.p2align 4
+L(exit_null_on_second_vector):
+	sub	%rdi, %rax
+	bsf	%rdx, %rdx
+	add	%rdx, %rax
+	add	$VEC_SIZE, %rax
+	jmp	L(StartStrcpyPart)
+
+	.p2align 4
+L(exit_null_on_third_vector):
+	sub	%rdi, %rax
+	bsf	%rdx, %rdx
+	add	%rdx, %rax
+	add	$(VEC_SIZE * 2), %rax
+	jmp	L(StartStrcpyPart)
+
+	.p2align 4
+L(exit_null_on_fourth_vector):
+	sub	%rdi, %rax
+	bsf	%rdx, %rdx
+	add	%rdx, %rax
+	add	$(VEC_SIZE * 3), %rax
+	jmp	L(StartStrcpyPart)
+
+	.p2align 4
+L(exit_null_on_fifth_vector):
+	sub	%rdi, %rax
+	bsf	%rdx, %rdx
+	add	%rdx, %rax
+	add	$(VEC_SIZE * 4), %rax
+
+	.p2align 4
+L(StartStrcpyPart):
+	lea	(%r9, %rax), %rdi
+	mov	%rsi, %rcx
+	mov	%r9, %rax      /* save result */
+
+# ifdef USE_AS_STRNCAT
+	test	%r8, %r8
+	jz	L(ExitZero)
+#  define USE_AS_STRNCPY
+# endif
+
+# include "strcpy-avx2.S"
+#endif
diff --git a/sysdeps/x86_64/multiarch/strcat.c b/sysdeps/x86_64/multiarch/strcat.c
index a0341b9514..92c360afc4 100644
--- a/sysdeps/x86_64/multiarch/strcat.c
+++ b/sysdeps/x86_64/multiarch/strcat.c
@@ -24,7 +24,7 @@ 
 # undef strcat
 
 # define SYMBOL_NAME strcat
-# include "ifunc-unaligned-ssse3.h"
+# include "ifunc-strcpy.h"
 
 libc_ifunc_redirected (__redirect_strcat, strcat, IFUNC_SELECTOR ());
 
diff --git a/sysdeps/x86_64/multiarch/strcpy-avx2.S b/sysdeps/x86_64/multiarch/strcpy-avx2.S
new file mode 100644
index 0000000000..81677f9060
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/strcpy-avx2.S
@@ -0,0 +1,1022 @@ 
+/* strcpy with AVX2
+   Copyright (C) 2011-2018 Free Software Foundation, Inc.
+   Contributed by Intel Corporation.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#if IS_IN (libc)
+
+# ifndef USE_AS_STRCAT
+#  include <sysdep.h>
+
+#  ifndef STRCPY
+#   define STRCPY  __strcpy_avx2
+#  endif
+
+# endif
+
+/* Number of bytes in a vector register */
+# ifndef VEC_SIZE
+#  define VEC_SIZE	32
+# endif
+
+# ifndef VZEROUPPER
+#  define VZEROUPPER	vzeroupper
+# endif
+
+/* zero register */
+#define xmmZ	xmm0
+#define ymmZ	ymm0
+
+/* mask register */
+#define ymmM	ymm1
+
+# ifndef USE_AS_STRCAT
+
+	.section .text.avx,"ax",@progbits
+ENTRY (STRCPY)
+#  ifdef USE_AS_STRNCPY
+	mov	%rdx, %r8
+	test	%r8, %r8
+	jz	L(ExitZero)
+#  endif
+	mov	%rsi, %rcx
+#  ifndef USE_AS_STPCPY
+	mov	%rdi, %rax      /* save result */
+#  endif
+
+# endif
+
+	vpxor	%xmmZ, %xmmZ, %xmmZ
+
+	and	$((VEC_SIZE * 4) - 1), %ecx
+	cmp	$(VEC_SIZE * 2), %ecx
+	jbe	L(SourceStringAlignmentLessTwoVecSize)
+
+	and	$-VEC_SIZE, %rsi
+	and	$(VEC_SIZE - 1), %ecx
+
+	vpcmpeqb (%rsi), %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	shr	%cl, %rdx
+
+# ifdef USE_AS_STRNCPY
+#  if defined USE_AS_STPCPY || defined USE_AS_STRCAT
+	mov	$VEC_SIZE, %r10
+	sub	%rcx, %r10
+	cmp	%r10, %r8
+#  else
+	mov	$(VEC_SIZE + 1), %r10
+	sub	%rcx, %r10
+	cmp	%r10, %r8
+#  endif
+	jbe	L(CopyVecSizeTailCase2OrCase3)
+# endif
+	test	%edx, %edx
+	jnz	L(CopyVecSizeTail)
+
+	vpcmpeqb VEC_SIZE(%rsi), %ymmZ, %ymm2
+	vpmovmskb %ymm2, %edx
+
+# ifdef USE_AS_STRNCPY
+	add	$VEC_SIZE, %r10
+	cmp	%r10, %r8
+	jbe	L(CopyTwoVecSizeCase2OrCase3)
+# endif
+	test	%edx, %edx
+	jnz	L(CopyTwoVecSize)
+
+	vmovdqu (%rsi, %rcx), %ymm2   /* copy VEC_SIZE bytes */
+	vmovdqu %ymm2, (%rdi)
+
+/* If source address alignment != destination address alignment */
+	.p2align 4
+L(UnalignVecSizeBoth):
+	sub	%rcx, %rdi
+# ifdef USE_AS_STRNCPY
+	add	%rcx, %r8
+	sbb	%rcx, %rcx
+	or	%rcx, %r8
+# endif
+	mov	$VEC_SIZE, %rcx
+	vmovdqa (%rsi, %rcx), %ymm2
+	vmovdqu %ymm2, (%rdi, %rcx)
+	vmovdqa VEC_SIZE(%rsi, %rcx), %ymm2
+	vpcmpeqb %ymm2, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	add	$VEC_SIZE, %rcx
+# ifdef USE_AS_STRNCPY
+	sub	$(VEC_SIZE * 3), %r8
+	jbe	L(CopyVecSizeCase2OrCase3)
+# endif
+	test	%edx, %edx
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec2)
+# else
+	jnz	L(CopyVecSize)
+# endif
+
+	vmovdqu %ymm2, (%rdi, %rcx)
+	vmovdqa VEC_SIZE(%rsi, %rcx), %ymm3
+	vpcmpeqb %ymm3, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	add	$VEC_SIZE, %rcx
+# ifdef USE_AS_STRNCPY
+	sub	$VEC_SIZE, %r8
+	jbe	L(CopyVecSizeCase2OrCase3)
+# endif
+	test	%edx, %edx
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec3)
+# else
+	jnz	L(CopyVecSize)
+# endif
+
+	vmovdqu %ymm3, (%rdi, %rcx)
+	vmovdqa VEC_SIZE(%rsi, %rcx), %ymm4
+	vpcmpeqb %ymm4, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	add	$VEC_SIZE, %rcx
+# ifdef USE_AS_STRNCPY
+	sub	$VEC_SIZE, %r8
+	jbe	L(CopyVecSizeCase2OrCase3)
+# endif
+	test	%edx, %edx
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec4)
+# else
+	jnz	L(CopyVecSize)
+# endif
+
+	vmovdqu %ymm4, (%rdi, %rcx)
+	vmovdqa VEC_SIZE(%rsi, %rcx), %ymm2
+	vpcmpeqb %ymm2, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	add	$VEC_SIZE, %rcx
+# ifdef USE_AS_STRNCPY
+	sub	$VEC_SIZE, %r8
+	jbe	L(CopyVecSizeCase2OrCase3)
+# endif
+	test	%edx, %edx
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec2)
+# else
+	jnz	L(CopyVecSize)
+# endif
+
+	vmovdqu %ymm2, (%rdi, %rcx)
+	vmovdqa VEC_SIZE(%rsi, %rcx), %ymm2
+	vpcmpeqb %ymm2, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	add	$VEC_SIZE, %rcx
+# ifdef USE_AS_STRNCPY
+	sub	$VEC_SIZE, %r8
+	jbe	L(CopyVecSizeCase2OrCase3)
+# endif
+	test	%edx, %edx
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec2)
+# else
+	jnz	L(CopyVecSize)
+# endif
+
+	vmovdqa VEC_SIZE(%rsi, %rcx), %ymm3
+	vmovdqu %ymm2, (%rdi, %rcx)
+	vpcmpeqb %ymm3, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	add	$VEC_SIZE, %rcx
+# ifdef USE_AS_STRNCPY
+	sub	$VEC_SIZE, %r8
+	jbe	L(CopyVecSizeCase2OrCase3)
+# endif
+	test	%edx, %edx
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec3)
+# else
+	jnz	L(CopyVecSize)
+# endif
+
+	vmovdqu %ymm3, (%rdi, %rcx)
+	mov	%rsi, %rdx
+	lea	VEC_SIZE(%rsi, %rcx), %rsi
+	and	$-(VEC_SIZE * 4), %rsi
+	sub	%rsi, %rdx
+	sub	%rdx, %rdi
+# ifdef USE_AS_STRNCPY
+	lea	(VEC_SIZE * 8)(%r8, %rdx), %r8
+# endif
+L(UnalignedFourVecSizeLoop):
+	vmovdqa (%rsi), %ymm4
+	vmovdqa VEC_SIZE(%rsi), %ymm5
+	vmovdqa (VEC_SIZE * 2)(%rsi), %ymm6
+	vmovdqa (VEC_SIZE * 3)(%rsi), %ymm7
+	vpminub %ymm5, %ymm4, %ymm2
+	vpminub %ymm7, %ymm6, %ymm3
+	vpminub %ymm2, %ymm3, %ymm3
+	vpcmpeqb %ymmM, %ymm3, %ymm3
+	vpmovmskb %ymm3, %edx
+# ifdef USE_AS_STRNCPY
+	sub	$(VEC_SIZE * 4), %r8
+	jbe	L(UnalignedLeaveCase2OrCase3)
+# endif
+	test	%edx, %edx
+	jnz	L(UnalignedFourVecSizeLeave)
+
+L(UnalignedFourVecSizeLoop_start):
+	add	$(VEC_SIZE * 4), %rdi
+	add	$(VEC_SIZE * 4), %rsi
+	vmovdqu %ymm4, -(VEC_SIZE * 4)(%rdi)
+	vmovdqa (%rsi), %ymm4
+	vmovdqu %ymm5, -(VEC_SIZE * 3)(%rdi)
+	vmovdqa VEC_SIZE(%rsi), %ymm5
+	vpminub %ymm5, %ymm4, %ymm2
+	vmovdqu %ymm6, -(VEC_SIZE * 2)(%rdi)
+	vmovdqa (VEC_SIZE * 2)(%rsi), %ymm6
+	vmovdqu %ymm7, -VEC_SIZE(%rdi)
+	vmovdqa (VEC_SIZE * 3)(%rsi), %ymm7
+	vpminub %ymm7, %ymm6, %ymm3
+	vpminub %ymm2, %ymm3, %ymm3
+	vpcmpeqb %ymmM, %ymm3, %ymm3
+	vpmovmskb %ymm3, %edx
+# ifdef USE_AS_STRNCPY
+	sub	$(VEC_SIZE * 4), %r8
+	jbe	L(UnalignedLeaveCase2OrCase3)
+# endif
+	test	%edx, %edx
+	jz	L(UnalignedFourVecSizeLoop_start)
+
+L(UnalignedFourVecSizeLeave):
+	vpcmpeqb %ymm4, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	test	%edx, %edx
+	jnz	L(CopyVecSizeUnaligned_0)
+
+	vpcmpeqb %ymm5, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %ecx
+	test	%ecx, %ecx
+	jnz	L(CopyVecSizeUnaligned_16)
+
+	vpcmpeqb %ymm6, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	test	%edx, %edx
+	jnz	L(CopyVecSizeUnaligned_32)
+
+	vpcmpeqb %ymm7, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %ecx
+	bsf	%ecx, %edx
+	vmovdqu %ymm4, (%rdi)
+	vmovdqu %ymm5, VEC_SIZE(%rdi)
+	vmovdqu %ymm6, (VEC_SIZE * 2)(%rdi)
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+# ifdef USE_AS_STPCPY
+	lea	(VEC_SIZE * 3)(%rdi, %rdx), %rax
+# endif
+	vmovdqu %ymm7, (VEC_SIZE * 3)(%rdi)
+	add	$(VEC_SIZE - 1), %r8
+	sub	%rdx, %r8
+	lea	((VEC_SIZE * 3) + 1)(%rdi, %rdx), %rdi
+	jmp	L(StrncpyFillTailWithZero)
+# else
+	add	$(VEC_SIZE * 3), %rsi
+	add	$(VEC_SIZE * 3), %rdi
+	jmp	L(CopyVecSizeExit)
+# endif
+
+/* If source address alignment == destination address alignment */
+
+L(SourceStringAlignmentLessTwoVecSize):
+	vmovdqu (%rsi), %ymm3
+	vmovdqu VEC_SIZE(%rsi), %ymm2
+	vpcmpeqb %ymm3, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+
+# ifdef USE_AS_STRNCPY
+#  if defined USE_AS_STPCPY || defined USE_AS_STRCAT
+	cmp	$VEC_SIZE, %r8
+#  else
+	cmp	$(VEC_SIZE + 1), %r8
+#  endif
+	jbe	L(CopyVecSizeTail1Case2OrCase3)
+# endif
+	test	%edx, %edx
+	jnz	L(CopyVecSizeTail1)
+
+	vmovdqu %ymm3, (%rdi)
+	vpcmpeqb %ymm2, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+
+# ifdef USE_AS_STRNCPY
+#  if defined USE_AS_STPCPY || defined USE_AS_STRCAT
+	cmp	$(VEC_SIZE * 2), %r8
+#  else
+	cmp	$((VEC_SIZE * 2) + 1), %r8
+#  endif
+	jbe	L(CopyTwoVecSize1Case2OrCase3)
+# endif
+	test	%edx, %edx
+	jnz	L(CopyTwoVecSize1)
+
+	and	$-VEC_SIZE, %rsi
+	and	$(VEC_SIZE - 1), %ecx
+	jmp	L(UnalignVecSizeBoth)
+
+/*------End of main part with loops---------------------*/
+
+/* Case1 */
+
+# if (!defined USE_AS_STRNCPY) || (defined USE_AS_STRCAT)
+	.p2align 4
+L(CopyVecSize):
+	add	%rcx, %rdi
+# endif
+L(CopyVecSizeTail):
+	add	%rcx, %rsi
+L(CopyVecSizeTail1):
+	bsf	%edx, %edx
+L(CopyVecSizeExit):
+	cmp	$32, %edx
+	jae	L(Exit32_63)
+	cmp	$16, %edx
+	jae	L(Exit16_31)
+	cmp	$8, %edx
+	jae	L(Exit8_15)
+	cmp	$4, %edx
+	jae	L(Exit4_7)
+	cmp	$3, %edx
+	je	L(Exit3)
+	cmp	$1, %edx
+	ja	L(Exit2)
+	je	L(Exit1)
+	movb	$0, (%rdi)
+# ifdef USE_AS_STPCPY
+	lea	(%rdi), %rax
+# endif
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub	$1, %r8
+	lea	1(%rdi), %rdi
+	jnz	L(StrncpyFillTailWithZero)
+# endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(CopyTwoVecSize1):
+	add	$VEC_SIZE, %rsi
+	add	$VEC_SIZE, %rdi
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub	$VEC_SIZE, %r8
+# endif
+	jmp	L(CopyVecSizeTail1)
+
+	.p2align 4
+L(CopyTwoVecSize):
+	bsf	%edx, %edx
+	add	%rcx, %rsi
+	add	$VEC_SIZE, %edx
+	sub	%ecx, %edx
+	jmp	L(CopyVecSizeExit)
+
+	.p2align 4
+L(CopyVecSizeUnaligned_0):
+	bsf	%edx, %edx
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+# ifdef USE_AS_STPCPY
+	lea	(%rdi, %rdx), %rax
+# endif
+	vmovdqu %ymm4, (%rdi)
+	add	$((VEC_SIZE * 4) - 1), %r8
+	sub	%rdx, %r8
+	lea	1(%rdi, %rdx), %rdi
+	jmp	L(StrncpyFillTailWithZero)
+# else
+	jmp	L(CopyVecSizeExit)
+# endif
+
+	.p2align 4
+L(CopyVecSizeUnaligned_16):
+	bsf	%ecx, %edx
+	vmovdqu %ymm4, (%rdi)
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+# ifdef USE_AS_STPCPY
+	lea	VEC_SIZE(%rdi, %rdx), %rax
+# endif
+	vmovdqu %ymm5, VEC_SIZE(%rdi)
+	add	$((VEC_SIZE * 3) - 1), %r8
+	sub	%rdx, %r8
+	lea	(VEC_SIZE + 1)(%rdi, %rdx), %rdi
+	jmp	L(StrncpyFillTailWithZero)
+# else
+	add	$VEC_SIZE, %rsi
+	add	$VEC_SIZE, %rdi
+	jmp	L(CopyVecSizeExit)
+# endif
+
+	.p2align 4
+L(CopyVecSizeUnaligned_32):
+	bsf	%edx, %edx
+	vmovdqu %ymm4, (%rdi)
+	vmovdqu %ymm5, VEC_SIZE(%rdi)
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+# ifdef USE_AS_STPCPY
+	lea	(VEC_SIZE * 2)(%rdi, %rdx), %rax
+# endif
+	vmovdqu %ymm6, (VEC_SIZE * 2)(%rdi)
+	add	$((VEC_SIZE * 2) - 1), %r8
+	sub	%rdx, %r8
+	lea	((VEC_SIZE * 2) + 1)(%rdi, %rdx), %rdi
+	jmp	L(StrncpyFillTailWithZero)
+# else
+	add	$(VEC_SIZE * 2), %rsi
+	add	$(VEC_SIZE * 2), %rdi
+	jmp	L(CopyVecSizeExit)
+# endif
+
+# ifdef USE_AS_STRNCPY
+#  ifndef USE_AS_STRCAT
+	.p2align 4
+L(CopyVecSizeUnalignedVec6):
+	vmovdqu %ymm6, (%rdi, %rcx)
+	jmp	L(CopyVecSizeVecExit)
+
+	.p2align 4
+L(CopyVecSizeUnalignedVec5):
+	vmovdqu %ymm5, (%rdi, %rcx)
+	jmp	L(CopyVecSizeVecExit)
+
+	.p2align 4
+L(CopyVecSizeUnalignedVec4):
+	vmovdqu %ymm4, (%rdi, %rcx)
+	jmp	L(CopyVecSizeVecExit)
+
+	.p2align 4
+L(CopyVecSizeUnalignedVec3):
+	vmovdqu %ymm3, (%rdi, %rcx)
+	jmp	L(CopyVecSizeVecExit)
+#  endif
+
+/* Case2 */
+
+	.p2align 4
+L(CopyVecSizeCase2):
+	add	$VEC_SIZE, %r8
+	add	%rcx, %rdi
+	add	%rcx, %rsi
+	bsf	%edx, %edx
+	cmp	%r8d, %edx
+	jb	L(CopyVecSizeExit)
+	jmp	L(StrncpyExit)
+
+	.p2align 4
+L(CopyTwoVecSizeCase2):
+	add	%rcx, %rsi
+	bsf	%edx, %edx
+	add	$VEC_SIZE, %edx
+	sub	%ecx, %edx
+	cmp	%r8d, %edx
+	jb	L(CopyVecSizeExit)
+	jmp	L(StrncpyExit)
+
+L(CopyVecSizeTailCase2):
+	add	%rcx, %rsi
+	bsf	%edx, %edx
+	cmp	%r8d, %edx
+	jb	L(CopyVecSizeExit)
+	jmp	L(StrncpyExit)
+
+L(CopyVecSizeTail1Case2):
+	bsf	%edx, %edx
+	cmp	%r8d, %edx
+	jb	L(CopyVecSizeExit)
+	jmp	L(StrncpyExit)
+
+/* Case2 or Case3,  Case3 */
+
+	.p2align 4
+L(CopyVecSizeCase2OrCase3):
+	test	%rdx, %rdx
+	jnz	L(CopyVecSizeCase2)
+L(CopyVecSizeCase3):
+	add	$VEC_SIZE, %r8
+	add	%rcx, %rdi
+	add	%rcx, %rsi
+	jmp	L(StrncpyExit)
+
+	.p2align 4
+L(CopyTwoVecSizeCase2OrCase3):
+	test	%rdx, %rdx
+	jnz	L(CopyTwoVecSizeCase2)
+	add	%rcx, %rsi
+	jmp	L(StrncpyExit)
+
+	.p2align 4
+L(CopyVecSizeTailCase2OrCase3):
+	test	%rdx, %rdx
+	jnz	L(CopyVecSizeTailCase2)
+	add	%rcx, %rsi
+	jmp	L(StrncpyExit)
+
+	.p2align 4
+L(CopyTwoVecSize1Case2OrCase3):
+	add	$VEC_SIZE, %rdi
+	add	$VEC_SIZE, %rsi
+	sub	$VEC_SIZE, %r8
+L(CopyVecSizeTail1Case2OrCase3):
+	test	%rdx, %rdx
+	jnz	L(CopyVecSizeTail1Case2)
+	jmp	L(StrncpyExit)
+# endif
+
+/*------------End labels regarding with copying 1-VEC_SIZE bytes--and 1-(VEC_SIZE*2) bytes----*/
+
+	.p2align 4
+L(Exit1):
+	movzwl	(%rsi), %edx
+	mov	%dx, (%rdi)
+# ifdef USE_AS_STPCPY
+	lea	1(%rdi), %rax
+# endif
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub	$2, %r8
+	lea	2(%rdi), %rdi
+	jnz	L(StrncpyFillTailWithZero)
+# endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Exit2):
+	movzwl	(%rsi), %ecx
+	mov	%cx, (%rdi)
+	movb	$0, 2(%rdi)
+# ifdef USE_AS_STPCPY
+	lea	2(%rdi), %rax
+# endif
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub	$3, %r8
+	lea	3(%rdi), %rdi
+	jnz	L(StrncpyFillTailWithZero)
+# endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Exit3):
+	mov	(%rsi), %edx
+	mov	%edx, (%rdi)
+# ifdef USE_AS_STPCPY
+	lea	3(%rdi), %rax
+# endif
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub	$4, %r8
+	lea	4(%rdi), %rdi
+	jnz	L(StrncpyFillTailWithZero)
+# endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Exit4_7):
+	mov	(%rsi), %ecx
+	mov	%ecx, (%rdi)
+	mov	-3(%rsi, %rdx), %ecx
+	mov	%ecx, -3(%rdi, %rdx)
+# ifdef USE_AS_STPCPY
+	lea	(%rdi, %rdx), %rax
+# endif
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub	%rdx, %r8
+	sub	$1, %r8
+	lea	1(%rdi, %rdx), %rdi
+	jnz	L(StrncpyFillTailWithZero)
+# endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Exit8_15):
+	mov	(%rsi), %rcx
+	mov	-7(%rsi, %rdx), %r9
+	mov	%rcx, (%rdi)
+	mov	%r9, -7(%rdi, %rdx)
+# ifdef USE_AS_STPCPY
+	lea	(%rdi, %rdx), %rax
+# endif
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub	%rdx, %r8
+	sub	$1, %r8
+	lea	1(%rdi, %rdx), %rdi
+	jnz	L(StrncpyFillTailWithZero)
+# endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Exit16_31):
+	vmovdqu (%rsi), %xmm2
+	vmovdqu -15(%rsi, %rdx), %xmm3
+	vmovdqu %xmm2, (%rdi)
+	vmovdqu %xmm3, -15(%rdi, %rdx)
+# ifdef USE_AS_STPCPY
+	lea	(%rdi, %rdx), %rax
+# endif
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub %rdx, %r8
+	sub $1, %r8
+	lea 1(%rdi, %rdx), %rdi
+	jnz L(StrncpyFillTailWithZero)
+# endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Exit32_63):
+	vmovdqu (%rsi), %ymm2
+	vmovdqu -31(%rsi, %rdx), %ymm3
+	vmovdqu %ymm2, (%rdi)
+	vmovdqu %ymm3, -31(%rdi, %rdx)
+# ifdef USE_AS_STPCPY
+	lea	(%rdi, %rdx), %rax
+# endif
+# if defined USE_AS_STRNCPY && !defined USE_AS_STRCAT
+	sub	%rdx, %r8
+	sub	$1, %r8
+	lea	1(%rdi, %rdx), %rdi
+	jnz	L(StrncpyFillTailWithZero)
+# endif
+	VZEROUPPER
+	ret
+
+# ifdef USE_AS_STRNCPY
+
+	.p2align 4
+L(StrncpyExit1):
+	movzbl	(%rsi), %edx
+	mov	%dl, (%rdi)
+#  ifdef USE_AS_STPCPY
+	lea	1(%rdi), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, 1(%rdi)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(StrncpyExit2):
+	movzwl	(%rsi), %edx
+	mov	%dx, (%rdi)
+#  ifdef USE_AS_STPCPY
+	lea	2(%rdi), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, 2(%rdi)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(StrncpyExit3_4):
+	movzwl	(%rsi), %ecx
+	movzwl	-2(%rsi, %r8), %edx
+	mov	%cx, (%rdi)
+	mov	%dx, -2(%rdi, %r8)
+#  ifdef USE_AS_STPCPY
+	lea	(%rdi, %r8), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, (%rdi, %r8)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(StrncpyExit5_8):
+	mov	(%rsi), %ecx
+	mov	-4(%rsi, %r8), %edx
+	mov	%ecx, (%rdi)
+	mov	%edx, -4(%rdi, %r8)
+#  ifdef USE_AS_STPCPY
+	lea	(%rdi, %r8), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, (%rdi, %r8)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(StrncpyExit9_16):
+	mov	(%rsi), %rcx
+	mov	-8(%rsi, %r8), %rdx
+	mov	%rcx, (%rdi)
+	mov	%rdx, -8(%rdi, %r8)
+#  ifdef USE_AS_STPCPY
+	lea	(%rdi, %r8), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, (%rdi, %r8)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(StrncpyExit17_32):
+	vmovdqu (%rsi), %xmm2
+	vmovdqu -16(%rsi, %r8), %xmm3
+	vmovdqu %xmm2, (%rdi)
+	vmovdqu %xmm3, -16(%rdi, %r8)
+#  ifdef USE_AS_STPCPY
+	lea	(%rdi, %r8), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, (%rdi, %r8)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(StrncpyExit33_64):
+	/*  0/32, 31/16 */
+	vmovdqu (%rsi), %ymm2
+	vmovdqu -VEC_SIZE(%rsi, %r8), %ymm3
+	vmovdqu %ymm2, (%rdi)
+	vmovdqu %ymm3, -VEC_SIZE(%rdi, %r8)
+#  ifdef USE_AS_STPCPY
+	lea	(%rdi, %r8), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, (%rdi, %r8)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(StrncpyExit65):
+	/* 0/32, 32/32, 64/1 */
+	vmovdqu (%rsi), %ymm2
+	vmovdqu 32(%rsi), %ymm3
+	mov	64(%rsi), %cl
+	vmovdqu %ymm2, (%rdi)
+	vmovdqu %ymm3, 32(%rdi)
+	mov	%cl, 64(%rdi)
+#  ifdef USE_AS_STPCPY
+	lea	65(%rdi), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, 65(%rdi)
+#  endif
+	VZEROUPPER
+	ret
+
+#  ifndef USE_AS_STRCAT
+
+	.p2align 4
+L(Fill1):
+	mov	%dl, (%rdi)
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Fill2):
+	mov	%dx, (%rdi)
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Fill3_4):
+	mov	%dx, (%rdi)
+	mov     %dx, -2(%rdi, %r8)
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Fill5_8):
+	mov	%edx, (%rdi)
+	mov     %edx, -4(%rdi, %r8)
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Fill9_16):
+	mov	%rdx, (%rdi)
+	mov	%rdx, -8(%rdi, %r8)
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(Fill17_32):
+	vmovdqu %xmmZ, (%rdi)
+	vmovdqu %xmmZ, -16(%rdi, %r8)
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(CopyVecSizeUnalignedVec2):
+	vmovdqu %ymm2, (%rdi, %rcx)
+
+	.p2align 4
+L(CopyVecSizeVecExit):
+	bsf	%edx, %edx
+	add	$(VEC_SIZE - 1), %r8
+	add	%rcx, %rdi
+#   ifdef USE_AS_STPCPY
+	lea	(%rdi, %rdx), %rax
+#   endif
+	sub	%rdx, %r8
+	lea	1(%rdi, %rdx), %rdi
+
+	.p2align 4
+L(StrncpyFillTailWithZero):
+	xor	%edx, %edx
+	sub	$VEC_SIZE, %r8
+	jbe	L(StrncpyFillExit)
+
+	vmovdqu %ymmZ, (%rdi)
+	add	$VEC_SIZE, %rdi
+
+	mov	%rdi, %rsi
+	and	$(VEC_SIZE - 1), %esi
+	sub	%rsi, %rdi
+	add	%rsi, %r8
+	sub	$(VEC_SIZE * 4), %r8
+	jb	L(StrncpyFillLessFourVecSize)
+
+L(StrncpyFillLoopVmovdqa):
+	vmovdqa %ymmZ, (%rdi)
+	vmovdqa %ymmZ, VEC_SIZE(%rdi)
+	vmovdqa %ymmZ, (VEC_SIZE * 2)(%rdi)
+	vmovdqa %ymmZ, (VEC_SIZE * 3)(%rdi)
+	add	$(VEC_SIZE * 4), %rdi
+	sub	$(VEC_SIZE * 4), %r8
+	jae	L(StrncpyFillLoopVmovdqa)
+
+L(StrncpyFillLessFourVecSize):
+	add	$(VEC_SIZE * 2), %r8
+	jl	L(StrncpyFillLessTwoVecSize)
+	vmovdqa %ymmZ, (%rdi)
+	vmovdqa %ymmZ, VEC_SIZE(%rdi)
+	add	$(VEC_SIZE * 2), %rdi
+	sub	$VEC_SIZE, %r8
+	jl	L(StrncpyFillExit)
+	vmovdqa %ymmZ, (%rdi)
+	add	$VEC_SIZE, %rdi
+	jmp	L(Fill)
+
+	.p2align 4
+L(StrncpyFillLessTwoVecSize):
+	add	$VEC_SIZE, %r8
+	jl	L(StrncpyFillExit)
+	vmovdqa %ymmZ, (%rdi)
+	add	$VEC_SIZE, %rdi
+	jmp	L(Fill)
+
+	.p2align 4
+L(StrncpyFillExit):
+	add	$VEC_SIZE, %r8
+L(Fill):
+	cmp	$17, %r8d
+	jae	L(Fill17_32)
+	cmp	$9, %r8d
+	jae	L(Fill9_16)
+	cmp	$5, %r8d
+	jae	L(Fill5_8)
+	cmp	$3, %r8d
+	jae	L(Fill3_4)
+	cmp	$1, %r8d
+	ja	L(Fill2)
+	je	L(Fill1)
+	VZEROUPPER
+	ret
+
+/* end of ifndef USE_AS_STRCAT */
+#  endif
+
+	.p2align 4
+L(UnalignedLeaveCase2OrCase3):
+	test	%rdx, %rdx
+	jnz	L(UnalignedFourVecSizeLeaveCase2)
+L(UnalignedFourVecSizeLeaveCase3):
+	lea	(VEC_SIZE * 4)(%r8), %rcx
+	and	$-VEC_SIZE, %rcx
+	add	$(VEC_SIZE * 3), %r8
+	jl	L(CopyVecSizeCase3)
+	vmovdqu %ymm4, (%rdi)
+	sub	$VEC_SIZE, %r8
+	jb	L(CopyVecSizeCase3)
+	vmovdqu %ymm5, VEC_SIZE(%rdi)
+	sub	$VEC_SIZE, %r8
+	jb	L(CopyVecSizeCase3)
+	vmovdqu %ymm6, (VEC_SIZE * 2)(%rdi)
+	sub	$VEC_SIZE, %r8
+	jb	L(CopyVecSizeCase3)
+	vmovdqu %ymm7, (VEC_SIZE * 3)(%rdi)
+#  ifdef USE_AS_STPCPY
+	lea	(VEC_SIZE * 4)(%rdi), %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, (VEC_SIZE * 4)(%rdi)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(UnalignedFourVecSizeLeaveCase2):
+	xor	%ecx, %ecx
+	vpcmpeqb %ymm4, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	add	$(VEC_SIZE * 3), %r8
+	jle	L(CopyVecSizeCase2OrCase3)
+	test	%edx, %edx
+#  ifndef USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec4)
+#  else
+	jnz	L(CopyVecSize)
+#  endif
+	vpcmpeqb %ymm5, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	vmovdqu %ymm4, (%rdi)
+	add	$VEC_SIZE, %rcx
+	sub	$VEC_SIZE, %r8
+	jbe	L(CopyVecSizeCase2OrCase3)
+	test	%edx, %edx
+#  ifndef USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec5)
+#  else
+	jnz	L(CopyVecSize)
+#  endif
+
+	vpcmpeqb %ymm6, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	vmovdqu %ymm5, VEC_SIZE(%rdi)
+	add	$VEC_SIZE, %rcx
+	sub	$VEC_SIZE, %r8
+	jbe	L(CopyVecSizeCase2OrCase3)
+	test	%edx, %edx
+#  ifndef USE_AS_STRCAT
+	jnz	L(CopyVecSizeUnalignedVec6)
+#  else
+	jnz	L(CopyVecSize)
+#  endif
+
+	vpcmpeqb %ymm7, %ymmZ, %ymmM
+	vpmovmskb %ymmM, %edx
+	vmovdqu %ymm6, (VEC_SIZE * 2)(%rdi)
+	lea	VEC_SIZE(%rdi, %rcx), %rdi
+	lea	VEC_SIZE(%rsi, %rcx), %rsi
+	bsf	%edx, %edx
+	cmp	%r8d, %edx
+	jb	L(CopyVecSizeExit)
+L(StrncpyExit):
+	cmp	$65, %r8d
+	je	L(StrncpyExit65)
+	cmp	$33, %r8d
+	jae	L(StrncpyExit33_64)
+	cmp	$17, %r8d
+	jae	L(StrncpyExit17_32)
+	cmp	$9, %r8d
+	jae	L(StrncpyExit9_16)
+	cmp	$5, %r8d
+	jae	L(StrncpyExit5_8)
+	cmp	$3, %r8d
+	jae	L(StrncpyExit3_4)
+	cmp	$1, %r8d
+	ja	L(StrncpyExit2)
+	je	L(StrncpyExit1)
+#  ifdef USE_AS_STPCPY
+	mov	%rdi, %rax
+#  endif
+#  ifdef USE_AS_STRCAT
+	movb	$0, (%rdi)
+#  endif
+	VZEROUPPER
+	ret
+
+	.p2align 4
+L(ExitZero):
+#  ifndef USE_AS_STRCAT
+	mov	%rdi, %rax
+#  endif
+	VZEROUPPER
+	ret
+
+# endif
+
+# ifndef USE_AS_STRCAT
+END (STRCPY)
+# else
+END (STRCAT)
+# endif
+#endif
diff --git a/sysdeps/x86_64/multiarch/strcpy.c b/sysdeps/x86_64/multiarch/strcpy.c
index f125fd12f9..5e079edfca 100644
--- a/sysdeps/x86_64/multiarch/strcpy.c
+++ b/sysdeps/x86_64/multiarch/strcpy.c
@@ -24,7 +24,7 @@ 
 # undef strcpy
 
 # define SYMBOL_NAME strcpy
-# include "ifunc-unaligned-ssse3.h"
+# include "ifunc-strcpy.h"
 
 libc_ifunc_redirected (__redirect_strcpy, strcpy, IFUNC_SELECTOR ());
 
diff --git a/sysdeps/x86_64/multiarch/strncat-avx2.S b/sysdeps/x86_64/multiarch/strncat-avx2.S
new file mode 100644
index 0000000000..bfefa659bb
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/strncat-avx2.S
@@ -0,0 +1,3 @@ 
+#define USE_AS_STRNCAT
+#define STRCAT __strncat_avx2
+#include "strcat-avx2.S"
diff --git a/sysdeps/x86_64/multiarch/strncat.c b/sysdeps/x86_64/multiarch/strncat.c
index e95f62acac..b6cae40263 100644
--- a/sysdeps/x86_64/multiarch/strncat.c
+++ b/sysdeps/x86_64/multiarch/strncat.c
@@ -24,7 +24,7 @@ 
 # undef strncat
 
 # define SYMBOL_NAME strncat
-# include "ifunc-unaligned-ssse3.h"
+# include "ifunc-strcpy.h"
 
 libc_ifunc_redirected (__redirect_strncat, strncat, IFUNC_SELECTOR ());
 strong_alias (strncat, __strncat);
diff --git a/sysdeps/x86_64/multiarch/strncpy-avx2.S b/sysdeps/x86_64/multiarch/strncpy-avx2.S
new file mode 100644
index 0000000000..9ef8c87627
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/strncpy-avx2.S
@@ -0,0 +1,3 @@ 
+#define USE_AS_STRNCPY
+#define STRCPY __strncpy_avx2
+#include "strcpy-avx2.S"
diff --git a/sysdeps/x86_64/multiarch/strncpy.c b/sysdeps/x86_64/multiarch/strncpy.c
index daa150cee3..d6fd34671d 100644
--- a/sysdeps/x86_64/multiarch/strncpy.c
+++ b/sysdeps/x86_64/multiarch/strncpy.c
@@ -24,7 +24,7 @@ 
 # undef strncpy
 
 # define SYMBOL_NAME strncpy
-# include "ifunc-unaligned-ssse3.h"
+# include "ifunc-strcpy.h"
 
 libc_ifunc_redirected (__redirect_strncpy, strncpy, IFUNC_SELECTOR ());