diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 496ab51973..f90a41d3ae 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -52,3 +52,7 @@ tst-dl-runtime-profile-noaudit-ENV = $(env-profile)
 tst-dl-runtime-profile-audit-ENV = $(env-profile) $(env-audit)
 endif
 endif
+
+ifeq ($(subdir),string)
+sysdep_routines += memset memset-z900
+endif
diff --git a/sysdeps/s390/ifunc-memset.h b/sysdeps/s390/ifunc-memset.h
new file mode 100644
index 0000000000..9a13b1001f
--- /dev/null
+++ b/sysdeps/s390/ifunc-memset.h
@@ -0,0 +1,65 @@
+/* memset variant information on S/390 version.
+   Copyright (C) 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/>.  */
+
+#if defined USE_MULTIARCH && IS_IN (libc)	\
+  && ! defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
+# define HAVE_MEMSET_IFUNC	1
+#else
+# define HAVE_MEMSET_IFUNC	0
+#endif
+
+#if defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
+# define MEMSET_DEFAULT		MEMSET_Z196
+# define HAVE_MEMSET_Z900_G5	0
+# define HAVE_MEMSET_Z10	0
+# define HAVE_MEMSET_Z196	1
+#elif defined HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT
+# define MEMSET_DEFAULT		MEMSET_Z10
+# define HAVE_MEMSET_Z900_G5	0
+# define HAVE_MEMSET_Z10	1
+# define HAVE_MEMSET_Z196	HAVE_MEMSET_IFUNC
+#else
+# define MEMSET_DEFAULT		MEMSET_Z900_G5
+# define HAVE_MEMSET_Z900_G5	1
+# define HAVE_MEMSET_Z10	HAVE_MEMSET_IFUNC
+# define HAVE_MEMSET_Z196	HAVE_MEMSET_IFUNC
+#endif
+
+#if HAVE_MEMSET_Z10 || HAVE_MEMSET_Z196
+# define HAVE_MEMSET_MVCLE	1
+#else
+# define HAVE_MEMSET_MVCLE	0
+#endif
+
+#if HAVE_MEMSET_Z900_G5
+# define MEMSET_Z900_G5		__memset_default
+#else
+# define MEMSET_Z900_G5		NULL
+#endif
+
+#if HAVE_MEMSET_Z10
+# define MEMSET_Z10		__memset_z10
+#else
+# define MEMSET_Z10		NULL
+#endif
+
+#if HAVE_MEMSET_Z196
+# define MEMSET_Z196		__memset_z196
+#else
+# define MEMSET_Z196		NULL
+#endif
diff --git a/sysdeps/s390/multiarch/memset-s390x.S b/sysdeps/s390/memset-z900.S
similarity index 57%
rename from sysdeps/s390/multiarch/memset-s390x.S
rename to sysdeps/s390/memset-z900.S
index aca3ac3fda..eaf13402bd 100644
--- a/sysdeps/s390/multiarch/memset-s390x.S
+++ b/sysdeps/s390/memset-z900.S
@@ -1,5 +1,6 @@
 /* Set a block of memory to some byte value.  31/64 bit S/390 version.
-   Copyright (C) 2012-2018 Free Software Foundation, Inc.
+   Copyright (C) 2001-2018 Free Software Foundation, Inc.
+   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -17,8 +18,9 @@
    <http://www.gnu.org/licenses/>.  */
 
 
-#include "sysdep.h"
+#include <sysdep.h>
 #include "asm-syntax.h"
+#include <ifunc-memset.h>
 
 /* INPUT PARAMETERS
      %r2 = address of memory area
@@ -27,43 +29,68 @@
 
        .text
 
-#if IS_IN (libc)
+#if HAVE_MEMSET_Z900_G5
+# if defined __s390x__
+#  define LTGR	ltgr
+#  define CGHI	cghi
+#  define LGR	lgr
+#  define AGHI	aghi
+#  define BRCTG	brctg
+# else
+#  define LTGR	ltr
+#  define CGHI	chi
+#  define LGR	lr
+#  define AGHI	ahi
+#  define BRCTG	brct
+# endif /* ! defined __s390x__  */
 
-ENTRY(__memset_z196)
-	.machine "z196"
-	.machinemode "zarch_nohighgprs"
-# if !defined __s390x__
-	llgfr	%r4,%r4
-# endif /* !defined __s390x__  */
-	ltgr    %r4,%r4
-	je      .L_Z196_4
+ENTRY(MEMSET_Z900_G5)
+#if defined __s390x__
+	.machine "z900"
+#else
+	.machine "g5"
+#endif /* ! defined __s390x__  */
+	LTGR    %r4,%r4
+	je      .L_Z900_G5_4
 	stc     %r3,0(%r2)
-	lgr     %r1,%r2
-	cghi    %r4,1
-	je      .L_Z196_4
-	aghi    %r4,-2
-	srlg    %r5,%r4,8
-	ltgr    %r5,%r5
-	jne     .L_Z196_1
-.L_Z196_3:
-	exrl    %r4,.L_Z196_17
-.L_Z196_4:
+	CGHI    %r4,1
+	LGR     %r1,%r2
+	je      .L_Z900_G5_4
+	AGHI    %r4,-2
+#if defined __s390x__
+	larl    %r5,.L_Z900_G5_18
+	srlg    %r3,%r4,8
+# define Z900_G5_EX_D 0
+#else
+	basr    %r5,0
+.L_Z900_G5_19:
+# define Z900_G5_EX_D .L_Z900_G5_18-.L_Z900_G5_19
+	lr      %r3,%r4
+	srl     %r3,8
+#endif /* ! defined __s390x__  */
+	LTGR    %r3,%r3
+	jne     .L_Z900_G5_14
+.L_Z900_G5_3:
+	ex      %r4,Z900_G5_EX_D(%r5)
+.L_Z900_G5_4:
 	br      %r14
-.L_Z196_1:
-	cgfi	%r5,1048576
-	jh	__memset_mvcle	   # Switch to mvcle for >256MB
-.L_Z196_2:
-	pfd     2,1024(%r1)
+.L_Z900_G5_14:
 	mvc     1(256,%r1),0(%r1)
-	aghi    %r5,-1
 	la      %r1,256(%r1)
-	jne     .L_Z196_2
-	j       .L_Z196_3
-.L_Z196_17:
+	BRCTG   %r3,.L_Z900_G5_14
+	j       .L_Z900_G5_3
+.L_Z900_G5_18:
 	mvc     1(1,%r1),0(%r1)
-END(__memset_z196)
+END(MEMSET_Z900_G5)
+# undef LTGR
+# undef CGHI
+# undef LGR
+# undef AGHI
+# undef BRCTG
+#endif /*  HAVE_MEMSET_Z900_G5  */
 
-ENTRY(__memset_z10)
+#if HAVE_MEMSET_Z10
+ENTRY(MEMSET_Z10)
 	.machine "z10"
 	.machinemode "zarch_nohighgprs"
 # if !defined __s390x__
@@ -91,8 +118,46 @@ ENTRY(__memset_z10)
 	j       .L_Z10_3
 .L_Z10_18:
 	mvc     1(1,%r1),0(%r1)
-END(__memset_z10)
+END(MEMSET_Z10)
+#endif /* HAVE_MEMSET_Z10  */
+
+#if HAVE_MEMSET_Z196
+ENTRY(MEMSET_Z196)
+	.machine "z196"
+	.machinemode "zarch_nohighgprs"
+# if !defined __s390x__
+	llgfr	%r4,%r4
+# endif /* !defined __s390x__  */
+	ltgr    %r4,%r4
+	je      .L_Z196_4
+	stc     %r3,0(%r2)
+	lgr     %r1,%r2
+	cghi    %r4,1
+	je      .L_Z196_4
+	aghi    %r4,-2
+	srlg    %r5,%r4,8
+	ltgr    %r5,%r5
+	jne     .L_Z196_1
+.L_Z196_3:
+	exrl    %r4,.L_Z196_17
+.L_Z196_4:
+	br      %r14
+.L_Z196_1:
+	cgfi	%r5,1048576
+	jh	__memset_mvcle	   # Switch to mvcle for >256MB
+.L_Z196_2:
+	pfd     2,1024(%r1)
+	mvc     1(256,%r1),0(%r1)
+	aghi    %r5,-1
+	la      %r1,256(%r1)
+	jne     .L_Z196_2
+	j       .L_Z196_3
+.L_Z196_17:
+	mvc     1(1,%r1),0(%r1)
+END(MEMSET_Z196)
+#endif /* HAVE_MEMSET_Z196  */
 
+#if HAVE_MEMSET_MVCLE
 ENTRY(__memset_mvcle)
 	aghi	%r4,2               # take back the change done by the caller
 	lgr	%r0,%r2		    # save source address
@@ -106,15 +171,16 @@ ENTRY(__memset_mvcle)
 .L1:
 	br	%r14
 END(__memset_mvcle)
+#endif /* HAVE_MEMSET_MVCLE  */
 
-#endif /* IS_IN (libc) */
-
-#include "../memset.S"
+#if ! HAVE_MEMSET_IFUNC
+/* If we don't use ifunc, define an alias for memset here.
+   Otherwise see sysdeps/s390/memset.c.  */
+strong_alias (MEMSET_DEFAULT, memset)
+#endif
 
-#if !IS_IN (libc)
-.globl   memset
-.set     memset,__memset_default
-#elif defined SHARED && IS_IN (libc)
-.globl   __GI_memset
-.set     __GI_memset,__memset_default
+#if defined SHARED && IS_IN (libc)
+/* Defines the internal symbol.
+   Compare to libc_hidden_builtin_def (memset) in string/memset.c.  */
+strong_alias (MEMSET_DEFAULT, __GI_memset)
 #endif
diff --git a/sysdeps/s390/memset.S b/sysdeps/s390/memset.S
deleted file mode 100644
index 72e7c5a42e..0000000000
--- a/sysdeps/s390/memset.S
+++ /dev/null
@@ -1,97 +0,0 @@
-/* Set a block of memory to some byte value.  31/64 bit S/390 version.
-   Copyright (C) 2001-2018 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
-   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 <sysdep.h>
-#include "asm-syntax.h"
-
-/* INPUT PARAMETERS
-     %r2 = address of memory area
-     %r3 = byte to fill memory with
-     %r4 = number of bytes to fill.  */
-
-       .text
-
-#if defined __s390x__
-# define LTGR	ltgr
-# define CGHI	cghi
-# define LGR	lgr
-# define AGHI	aghi
-# define BRCTG	brctg
-#else
-# define LTGR	ltr
-# define CGHI	chi
-# define LGR	lr
-# define AGHI	ahi
-# define BRCTG	brct
-#endif /* ! defined __s390x__  */
-
-#ifdef USE_MULTIARCH
-ENTRY(__memset_default)
-#else
-ENTRY(memset)
-#endif
-#if defined __s390x__
-	.machine "z900"
-#else
-	.machine "g5"
-#endif /* ! defined __s390x__  */
-	LTGR    %r4,%r4
-	je      .L_Z900_G5_4
-	stc     %r3,0(%r2)
-	CGHI    %r4,1
-	LGR     %r1,%r2
-	je      .L_Z900_G5_4
-	AGHI    %r4,-2
-#if defined __s390x__
-	larl    %r5,.L_Z900_G5_18
-	srlg    %r3,%r4,8
-# define Z900_G5_EX_D 0
-#else
-	basr    %r5,0
-.L_Z900_G5_19:
-# define Z900_G5_EX_D .L_Z900_G5_18-.L_Z900_G5_19
-	lr      %r3,%r4
-	srl     %r3,8
-#endif /* ! defined __s390x__  */
-	LTGR    %r3,%r3
-	jne     .L_Z900_G5_14
-.L_Z900_G5_3:
-	ex      %r4,Z900_G5_EX_D(%r5)
-.L_Z900_G5_4:
-	br      %r14
-.L_Z900_G5_14:
-	mvc     1(256,%r1),0(%r1)
-	la      %r1,256(%r1)
-	BRCTG   %r3,.L_Z900_G5_14
-	j       .L_Z900_G5_3
-.L_Z900_G5_18:
-	mvc     1(1,%r1),0(%r1)
-#ifdef USE_MULTIARCH
-END(__memset_default)
-#else
-END(memset)
-libc_hidden_builtin_def (memset)
-#endif
-
-#undef LTGR
-#undef CGHI
-#undef LGR
-#undef AGHI
-#undef BRCTG
diff --git a/sysdeps/s390/multiarch/memset.c b/sysdeps/s390/memset.c
similarity index 60%
rename from sysdeps/s390/multiarch/memset.c
rename to sysdeps/s390/memset.c
index 760b3e9df2..57a35aebc7 100644
--- a/sysdeps/s390/multiarch/memset.c
+++ b/sysdeps/s390/memset.c
@@ -16,11 +16,33 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#if IS_IN (libc)
+#include <ifunc-memset.h>
+#if HAVE_MEMSET_IFUNC
 # define memset __redirect_memset
 # include <string.h>
 # undef memset
 # include <ifunc-resolve.h>
 
-s390_libc_ifunc (__redirect_memset, __memset, memset)
+# if HAVE_MEMSET_Z900_G5
+extern __typeof (__redirect_memset) MEMSET_Z900_G5 attribute_hidden;
+# endif
+
+# if HAVE_MEMSET_Z10
+extern __typeof (__redirect_memset) MEMSET_Z10 attribute_hidden;
+# endif
+
+# if HAVE_MEMSET_Z196
+extern __typeof (__redirect_memset) MEMSET_Z196 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__redirect_memset, memset,
+		      ({
+			s390_libc_ifunc_init ();
+			(HAVE_MEMSET_Z196 && S390_IS_Z196 (stfle_bits))
+			  ? MEMSET_Z196
+			  : (HAVE_MEMSET_Z10 && S390_IS_Z10 (stfle_bits))
+			  ? MEMSET_Z10
+			  : MEMSET_DEFAULT;
+		      })
+		      )
 #endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 93ad21bfa2..c893ebc565 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -19,8 +19,7 @@ sysdep_routines += strlen strlen-vx strlen-c \
 		   rawmemchr rawmemchr-vx rawmemchr-c \
 		   memccpy memccpy-vx memccpy-c \
 		   memrchr memrchr-vx memrchr-c \
-		   mempcpy \
-		   memset memset-s390x
+		   mempcpy
 endif
 
 ifeq ($(subdir),wcsmbs)
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index ec3373ae26..2f671eac1f 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -21,6 +21,7 @@
 #include <wchar.h>
 #include <ifunc-impl-list.h>
 #include <ifunc-resolve.h>
+#include <ifunc-memset.h>
 
 /* Maximum number of IFUNC implementations.  */
 #define MAX_IFUNC	3
@@ -46,12 +47,21 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
       S390_STORE_STFLE (stfle_bits);
     }
 
+#if HAVE_MEMSET_IFUNC
   IFUNC_IMPL (i, name, memset,
+# if HAVE_MEMSET_Z196
 	      IFUNC_IMPL_ADD (array, i, memset,
-			      S390_IS_Z196 (stfle_bits), __memset_z196)
+			      S390_IS_Z196 (stfle_bits), MEMSET_Z196)
+# endif
+# if HAVE_MEMSET_Z10
 	      IFUNC_IMPL_ADD (array, i, memset,
-			      S390_IS_Z10 (stfle_bits), __memset_z10)
-	      IFUNC_IMPL_ADD (array, i, memset, 1, __memset_default))
+			      S390_IS_Z10 (stfle_bits), MEMSET_Z10)
+# endif
+# if HAVE_MEMSET_Z900_G5
+	      IFUNC_IMPL_ADD (array, i, memset, 1, MEMSET_Z900_G5)
+# endif
+	      )
+#endif /* HAVE_MEMSET_IFUNC */
 
   IFUNC_IMPL (i, name, memcmp,
 	      IFUNC_IMPL_ADD (array, i, memcmp,
