diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile
index bb5e970..395e432 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 9aaaef7..8b55bb6 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-strcpy.h b/sysdeps/x86_64/multiarch/ifunc-strcpy.h
new file mode 100644
index 0000000..4f2286f
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/ifunc-strcpy.h
@@ -0,0 +1,46 @@
+/* Common definition for ifunc selections optimized with SSE2, unaligned
+   SSE2 and SSSE3.
+   All versions must be listed in ifunc-impl-list.c.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
+   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/>.  */
+
+#include <init-arch.h>
+
+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);
+
+  if (CPU_FEATURES_CPU_P (cpu_features, SSSE3))
+    return OPTIMIZE (ssse3);
+
+  return OPTIMIZE (sse2);
+}
diff --git a/sysdeps/x86_64/multiarch/ifunc-unaligned-ssse3.h b/sysdeps/x86_64/multiarch/ifunc-unaligned-ssse3.h
deleted file mode 100644
index 81805f9..0000000
--- a/sysdeps/x86_64/multiarch/ifunc-unaligned-ssse3.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/* Common definition for ifunc selections optimized with SSE2, unaligned
-   SSE2 and SSSE3.
-   All versions must be listed in ifunc-impl-list.c.
-   Copyright (C) 2017-2018 Free Software Foundation, Inc.
-   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/>.  */
-
-#include <init-arch.h>
-
-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;
-
-static inline void *
-IFUNC_SELECTOR (void)
-{
-  const struct cpu_features* cpu_features = __get_cpu_features ();
-
-  if (CPU_FEATURES_ARCH_P (cpu_features, Fast_Unaligned_Load))
-    return OPTIMIZE (sse2_unaligned);
-
-  if (CPU_FEATURES_CPU_P (cpu_features, SSSE3))
-    return OPTIMIZE (ssse3);
-
-  return OPTIMIZE (sse2);
-}
diff --git a/sysdeps/x86_64/multiarch/stpcpy-avx2.S b/sysdeps/x86_64/multiarch/stpcpy-avx2.S
new file mode 100644
index 0000000..f0bd302
--- /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 1e340fc..8ffd13b 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 0000000..032b040
--- /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 28842ec..f3e203f 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 0000000..b062356
--- /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 1f7f626..694b9b2 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 0000000..81677f9
--- /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 12e0e3f..ecf90d4 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 0000000..bfefa65
--- /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 841c165..74f7d02 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 0000000..9ef8c87
--- /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 3c3de8b..93dfb4c 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 ());