PowerPC: multiarch memset/bzero for PowerPC64

17 files changed, 412 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 3a62a697cc..092ebb1b14 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,32 @@
 2013-12-13  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
 
+	* sysdeps/powerpc/powerpc64/memset.S (NO_BZERO_IMPL): Add macro to
+	avoid cretion of __bzero symbol.
+	* sysdeps/powerpc/powerpc64/power4/memset.S (NO_BZERO_IMPL):
+	Likewise.
+	* sysdeps/powerpc/powerpc64/power6/memset.S (NO_BZERO_IMPL):
+	Likewise.
+	* sysdeps/powerpc/powerpc64/power7/memset.S (NO_BZERO_IMPL):
+	Likewise.
+	* sysdeps/powerpc/powerpc64/multiarch/Makefile: Add memset/bzero
+	multiarch implementations.
+	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+	(__libc_ifunc_impl_list): Likewise.
+	* sysdeps/powerpc/powerpc64/multiarch/bzero-power4.S: New file.
+	* sysdeps/powerpc/powerpc64/multiarch/bzero-power6.S: New file.
+	* sysdeps/powerpc/powerpc64/multiarch/bzero-power7.S: New file.
+	* sysdeps/powerpc/powerpc64/multiarch/bzero.c: New file: multiarch
+	bzero for PPC32.
+	* sysdeps/powerpc/powerpc64/multiarch/memset-power4.S: New file.
+	* sysdeps/powerpc/powerpc64/multiarch/memset-power6.S: New file.
+	* sysdeps/powerpc/powerpc64/multiarch/memset-power7.S: New file.
+	* sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S: New file.
+	* sysdeps/powerpc/powerpc64/multiarch/memset.c: New file: multiarch
+	memset for PPC64.
+	* sysdeps/powerpc/powerpc64/multiarch/rtld-memset.c: New file.
+
+2013-12-13  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
+
 	* string/memcmp.c (memcmp): Using macro to redefine symbol name.
 	* sysdeps/powerpc/powerpc64/multiarch/Makefile: Add memcpy multiarch
 	implementations.
diff --git a/sysdeps/powerpc/powerpc64/memset.S b/sysdeps/powerpc/powerpc64/memset.S
index 1027a592c9..22c7d4e29d 100644
--- a/sysdeps/powerpc/powerpc64/memset.S
+++ b/sysdeps/powerpc/powerpc64/memset.S
@@ -247,6 +247,7 @@ L(medium_28t):
 END_GEN_TB (memset,TB_TOCLESS)
 libc_hidden_builtin_def (memset)
 
+#ifndef NO_BZERO_IMPL
 /* Copied from bzero.S to prevent the linker from inserting a stub
    between bzero and memset.  */
 ENTRY (__bzero)
@@ -257,3 +258,4 @@ ENTRY (__bzero)
 END_GEN_TB (__bzero,TB_TOCLESS)
 
 weak_alias (__bzero, bzero)
+#endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 4dd2f38bbd..2d06551213 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -1,5 +1,6 @@
 ifeq ($(subdir),string)
 sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
 		   memcpy-power4 memcpy-ppc64 memcmp-power7 memcmp-power4 \
-		   memcmp-ppc64
+		   memcmp-ppc64 memset-power7 memset-power6 memset-power4 \
+		   memset-ppc64 bzero-power4 bzero-power6 bzero-power7
 endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/bzero-power4.S b/sysdeps/powerpc/powerpc64/multiarch/bzero-power4.S
new file mode 100644
index 0000000000..cf58fc5d7b
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/bzero-power4.S
@@ -0,0 +1,26 @@
+/* Optimized bzero implementation for PowerPC64/POWER4.
+   Copyright (C) 2013 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 <sysdep.h>
+
+ENTRY (__bzero_power4)
+	CALL_MCOUNT 3
+	mr	r5,r4
+	li	r4,0
+	b	__memset_power4
+END_GEN_TB (__bzero_power4,TB_TOCLESS)
diff --git a/sysdeps/powerpc/powerpc64/multiarch/bzero-power6.S b/sysdeps/powerpc/powerpc64/multiarch/bzero-power6.S
new file mode 100644
index 0000000000..ee3b919c7e
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/bzero-power6.S
@@ -0,0 +1,26 @@
+/* Optimized bzero implementation for PowerPC64/POWER6.
+   Copyright (C) 2013 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 <sysdep.h>
+
+ENTRY (__bzero_power6)
+	CALL_MCOUNT 3
+	mr	r5,r4
+	li	r4,0
+	b	__memset_power6
+END_GEN_TB (__bzero_power6,TB_TOCLESS)
diff --git a/sysdeps/powerpc/powerpc64/multiarch/bzero-power7.S b/sysdeps/powerpc/powerpc64/multiarch/bzero-power7.S
new file mode 100644
index 0000000000..7abc6db849
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/bzero-power7.S
@@ -0,0 +1,26 @@
+/* Optimized bzero implementation for PowerPC64/POWER7.
+   Copyright (C) 2013 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 <sysdep.h>
+
+ENTRY (__bzero_power7)
+	CALL_MCOUNT 3
+	mr	r5,r4
+	li	r4,0
+	b	__memset_power7
+END_GEN_TB (__bzero_power7,TB_TOCLESS)
diff --git a/sysdeps/powerpc/powerpc64/multiarch/bzero.c b/sysdeps/powerpc/powerpc64/multiarch/bzero.c
new file mode 100644
index 0000000000..d7b3aaa877
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/bzero.c
@@ -0,0 +1,40 @@
+/* Multiple versions of bzero. PowerPC64 version.
+   Copyright (C) 2013 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/>.  */
+
+/* Define multiple versions only for definition in libc.  */
+#ifndef NOT_IN_libc
+# include <string.h>
+# include <strings.h>
+# include "init-arch.h"
+
+extern __typeof (bzero) __bzero_ppc attribute_hidden;
+extern __typeof (bzero) __bzero_power4 attribute_hidden;
+extern __typeof (bzero) __bzero_power6 attribute_hidden;
+extern __typeof (bzero) __bzero_power7 attribute_hidden;
+
+libc_ifunc (__bzero,
+            (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __bzero_power7 :
+	      (hwcap & PPC_FEATURE_ARCH_2_05)
+		? __bzero_power6 :
+		  (hwcap & PPC_FEATURE_POWER4)
+		? __bzero_power4
+            : __bzero_ppc);
+
+weak_alias (__bzero, bzero)
+#endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 338a71c4b5..5f277c1940 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -60,6 +60,16 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 	      IFUNC_IMPL_ADD (array, i, memcpy, hwcap & PPC_FEATURE_POWER4,
 			      __memcpy_power4)
 	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_ppc))
+
+  /* Support sysdeps/powerpc/powerpc64/multiarch/memset.c.  */
+  IFUNC_IMPL (i, name, memset,
+	      IFUNC_IMPL_ADD (array, i, memset, hwcap & PPC_FEATURE_HAS_VSX,
+			      __memset_power7)
+	      IFUNC_IMPL_ADD (array, i, memset, hwcap & PPC_FEATURE_ARCH_2_05,
+			      __memset_power6)
+	      IFUNC_IMPL_ADD (array, i, memset, hwcap & PPC_FEATURE_POWER4,
+			      __memset_power4)
+	      IFUNC_IMPL_ADD (array, i, memset, 1, __memset_ppc))
 #endif
 
   /* Support sysdeps/powerpc/powerpc64/multiarch/memcmp.c.  */
@@ -70,5 +80,15 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __memcmp_power4)
 	      IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_ppc))
 
+  /* Support sysdeps/powerpc/powerpc64/multiarch/bzero.c.  */
+  IFUNC_IMPL (i, name, bzero,
+	      IFUNC_IMPL_ADD (array, i, bzero, hwcap & PPC_FEATURE_HAS_VSX,
+			      __bzero_power7)
+	      IFUNC_IMPL_ADD (array, i, bzero, hwcap & PPC_FEATURE_ARCH_2_05,
+			      __bzero_power6)
+	      IFUNC_IMPL_ADD (array, i, bzero, hwcap & PPC_FEATURE_POWER4,
+			      __bzero_power4)
+	      IFUNC_IMPL_ADD (array, i, bzero, 1, __bzero_ppc))
+
   return i;
 }
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memset-power4.S b/sysdeps/powerpc/powerpc64/multiarch/memset-power4.S
new file mode 100644
index 0000000000..aac7fb1295
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memset-power4.S
@@ -0,0 +1,41 @@
+/* Optimized memset implementation for PowerPC64/POWER4.
+   Copyright (C) 2013 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 <sysdep.h>
+
+#undef EALIGN
+#define EALIGN(name, alignt, words)				\
+  .section ".text";						\
+  ENTRY_2(__memset_power4)					\
+  .align ALIGNARG(alignt);					\
+  EALIGN_W_##words;						\
+  BODY_LABEL(__memset_power4):					\
+  cfi_startproc;						\
+  LOCALENTRY(__memset_power4)
+
+#undef END_GEN_TB
+#define END_GEN_TB(name, mask)					\
+  cfi_endproc;							\
+  TRACEBACK_MASK(__memset_power4,mask)				\
+  END_2(__memset_power4)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#define NO_BZERO_IMPL
+#include <sysdeps/powerpc/powerpc64/power4/memset.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memset-power6.S b/sysdeps/powerpc/powerpc64/multiarch/memset-power6.S
new file mode 100644
index 0000000000..3144c699d5
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memset-power6.S
@@ -0,0 +1,41 @@
+/* Optimized memset implementation for PowerPC64/POWER6.
+   Copyright (C) 2013 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 <sysdep.h>
+
+#undef EALIGN
+#define EALIGN(name, alignt, words)				\
+  .section ".text";						\
+  ENTRY_2(__memset_power6)					\
+  .align ALIGNARG(alignt);					\
+  EALIGN_W_##words;						\
+  BODY_LABEL(__memset_power6):					\
+  cfi_startproc;						\
+  LOCALENTRY(__memset_power6)
+
+#undef END_GEN_TB
+#define END_GEN_TB(name, mask)					\
+  cfi_endproc;							\
+  TRACEBACK_MASK(__memset_power6,mask)				\
+  END_2(__memset_power6)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#define NO_BZERO_IMPL
+#include <sysdeps/powerpc/powerpc64/power6/memset.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memset-power7.S b/sysdeps/powerpc/powerpc64/multiarch/memset-power7.S
new file mode 100644
index 0000000000..ecfa963bd7
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memset-power7.S
@@ -0,0 +1,41 @@
+/* Optimized memset implementation for PowerPC64/POWER7.
+   Copyright (C) 2013 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 <sysdep.h>
+
+#undef EALIGN
+#define EALIGN(name, alignt, words)				\
+  .section ".text";						\
+  ENTRY_2(__memset_power7)					\
+  .align ALIGNARG(alignt);					\
+  EALIGN_W_##words;						\
+  BODY_LABEL(__memset_power7):					\
+  cfi_startproc;						\
+  LOCALENTRY(__memset_power7)
+
+#undef END_GEN_TB
+#define END_GEN_TB(name, mask)					\
+  cfi_endproc;							\
+  TRACEBACK_MASK(__memset_power7,mask)				\
+  END_2(__memset_power7)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#define NO_BZERO_IMPL
+#include <sysdeps/powerpc/powerpc64/power7/memset.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S
new file mode 100644
index 0000000000..95b98f8834
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S
@@ -0,0 +1,56 @@
+/* Default memset/bzero implementation for PowerPC64.
+   Copyright (C) 2013 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 <sysdep.h>
+
+#if defined SHARED && !defined NOT_IN_libc
+
+/* Copied from bzero.S to prevent the linker from inserting a stub
+   between bzero and memset.  */
+ENTRY (__bzero_ppc)
+        CALL_MCOUNT 3
+        mr      r5,r4
+        li      r4,0
+        b       L(_memset)
+END_GEN_TB (__bzero_ppc,TB_TOCLESS)
+
+# undef EALIGN
+# define EALIGN(name, alignt, words)				\
+  .section ".text";						\
+  ENTRY_2(__memset_ppc)						\
+  .align ALIGNARG(alignt);					\
+  EALIGN_W_##words;						\
+  BODY_LABEL(__memset_ppc):					\
+  cfi_startproc;						\
+  LOCALENTRY(__memset_ppc)
+
+# undef END_GEN_TB
+# define END_GEN_TB(name, mask)					\
+  cfi_endproc;							\
+  TRACEBACK_MASK(__memset_ppc,mask)				\
+  END_2(__memset_ppc)
+
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name)				\
+  .globl __GI_memset; __GI_memset = __memset_ppc
+
+/* Do not implement __bzero at powerpc64/memset.S.  */
+# define NO_BZERO_IMPL
+#endif
+
+#include <sysdeps/powerpc/powerpc64/memset.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memset.c b/sysdeps/powerpc/powerpc64/multiarch/memset.c
new file mode 100644
index 0000000000..226799e64d
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memset.c
@@ -0,0 +1,40 @@
+/* Multiple versions of memset.
+   Copyright (C) 2013 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/>.  */
+
+/* Define multiple versions only for definition in libc.  */
+#if defined SHARED && !defined NOT_IN_libc
+# include <string.h>
+# include <shlib-compat.h>
+# include "init-arch.h"
+
+extern __typeof (memset) __memset_ppc attribute_hidden;
+extern __typeof (memset) __memset_power4 attribute_hidden;
+extern __typeof (memset) __memset_power6 attribute_hidden;
+extern __typeof (memset) __memset_power7 attribute_hidden;
+
+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
+   ifunc symbol properly.  */
+libc_ifunc (memset,
+            (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __memset_power7 :
+	      (hwcap & PPC_FEATURE_ARCH_2_05)
+		? __memset_power6 :
+		  (hwcap & PPC_FEATURE_POWER4)
+		? __memset_power4
+            : __memset_ppc);
+#endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/rtld-memset.c b/sysdeps/powerpc/powerpc64/multiarch/rtld-memset.c
new file mode 100644
index 0000000000..c74a770528
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/rtld-memset.c
@@ -0,0 +1,18 @@
+/* Copyright (C) 2013 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 <sysdeps/powerpc/powerpc64/rtld-memset.c>
diff --git a/sysdeps/powerpc/powerpc64/power4/memset.S b/sysdeps/powerpc/powerpc64/power4/memset.S
index ad0d381281..9d6fef569a 100644
--- a/sysdeps/powerpc/powerpc64/power4/memset.S
+++ b/sysdeps/powerpc/powerpc64/power4/memset.S
@@ -235,6 +235,7 @@ L(medium_28t):
 END_GEN_TB (memset,TB_TOCLESS)
 libc_hidden_builtin_def (memset)
 
+#ifndef NO_BZERO_IMPL
 /* Copied from bzero.S to prevent the linker from inserting a stub
    between bzero and memset.  */
 ENTRY (__bzero)
@@ -245,3 +246,4 @@ ENTRY (__bzero)
 END_GEN_TB (__bzero,TB_TOCLESS)
 
 weak_alias (__bzero, bzero)
+#endif
diff --git a/sysdeps/powerpc/powerpc64/power6/memset.S b/sysdeps/powerpc/powerpc64/power6/memset.S
index d61988a195..15a83b74fa 100644
--- a/sysdeps/powerpc/powerpc64/power6/memset.S
+++ b/sysdeps/powerpc/powerpc64/power6/memset.S
@@ -379,6 +379,7 @@ L(medium_28t):
 END_GEN_TB (memset,TB_TOCLESS)
 libc_hidden_builtin_def (memset)
 
+#ifndef NO_BZERO_IMPL
 /* Copied from bzero.S to prevent the linker from inserting a stub
    between bzero and memset.  */
 ENTRY (__bzero)
@@ -389,3 +390,4 @@ ENTRY (__bzero)
 END_GEN_TB (__bzero,TB_TOCLESS)
 
 weak_alias (__bzero, bzero)
+#endif
diff --git a/sysdeps/powerpc/powerpc64/power7/memset.S b/sysdeps/powerpc/powerpc64/power7/memset.S
index 8b081e87cb..03a45c23c7 100644
--- a/sysdeps/powerpc/powerpc64/power7/memset.S
+++ b/sysdeps/powerpc/powerpc64/power7/memset.S
@@ -383,6 +383,7 @@ L(small):
 END_GEN_TB (memset,TB_TOCLESS)
 libc_hidden_builtin_def (memset)
 
+#ifndef NO_BZERO_IMPL
 /* Copied from bzero.S to prevent the linker from inserting a stub
    between bzero and memset.  */
 ENTRY (__bzero)
@@ -393,3 +394,4 @@ ENTRY (__bzero)
 END_GEN_TB (__bzero,TB_TOCLESS)
 
 weak_alias (__bzero, bzero)
+#endif