PowerPC: multiarch bzero cleanup for PPC64

This patch cleanups the multiarch bzero for powerpc64 by remove
the multiarch objects and use instead the the memset embedded
implementation presented in each multiarch optimization.  The
code generate is essentially the same, but the TB_TOCLESS (which
is not essential).

ChangeLog

@@ -1,3 +1,20 @@
+2014-09-10  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
+
+	* sysdeps/powerpc/powerpc64/multiarch/Makefile [sysdep_routines]:
+	Remove bzero multiarch objects.
+	* sysdeps/powerpc/powerpc64/multiarch/bzero-power4.S: Remove file.
+	* sysdeps/powerpc/powerpc64/multiarch/bzero-power6.S: Likewise.
+	* sysdeps/powerpc/powerpc64/multiarch/bzero-power7.S: Likewise.
+	* sysdeps/powerpc/powerpc64/multiarch/memset-power4.S [NO_BZERO_IMPL]:
+	Remove define.
+	[__bzero]: Redefine to specific name.
+	* sysdeps/powerpc/powerpc64/multiarch/memset-power6.S: Likewise.
+	* sysdeps/powerpc/powerpc64/multiarch/memset-power7.S: Likewise.
+	* sysdeps/powerpc/powerpc64/power4/memset.S [NO_BZERO_IMPL]: Remove
+	define.
+	* sysdeps/powerpc/powerpc64/power6/memset.S: Likewise.
+	* sysdeps/powerpc/powerpc64/power7/memset.S: Likewise.
+
 2014-09-10  Florian Weimer  <fweimer@redhat.com>
 
 	* Makeconfig (gccwarn-c): Turn implicit-function-declaration

sysdeps/powerpc/powerpc64/multiarch/Makefile

@@ -2,7 +2,7 @@ ifeq ($(subdir),string)
 sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
 		   memcpy-power4 memcpy-ppc64 memcmp-power7 memcmp-power4 \
 		   memcmp-ppc64 memset-power7 memset-power6 memset-power4 \
-		   memset-ppc64 bzero-power4 bzero-power6 bzero-power7 \
+		   memset-ppc64 \
 		   mempcpy-power7 mempcpy-ppc64 memchr-power7 memchr-ppc64 \
 		   memrchr-power7 memrchr-ppc64 rawmemchr-power7 \
 		   rawmemchr-ppc64 strlen-power7 strlen-ppc64 strnlen-power7 \

sysdeps/powerpc/powerpc64/multiarch/memset-power4.S

@@ -37,5 +37,7 @@
 #undef libc_hidden_builtin_def
 #define libc_hidden_builtin_def(name)
 
-#define NO_BZERO_IMPL
+#undef __bzero
+#define __bzero __bzero_power4
+
 #include <sysdeps/powerpc/powerpc64/power4/memset.S>

sysdeps/powerpc/powerpc64/multiarch/memset-power6.S

@@ -37,5 +37,7 @@
 #undef libc_hidden_builtin_def
 #define libc_hidden_builtin_def(name)
 
-#define NO_BZERO_IMPL
+#undef __bzero
+#define __bzero __bzero_power6
+
 #include <sysdeps/powerpc/powerpc64/power6/memset.S>

sysdeps/powerpc/powerpc64/multiarch/memset-power7.S

@@ -37,5 +37,6 @@
 #undef libc_hidden_builtin_def
 #define libc_hidden_builtin_def(name)
 
-#define NO_BZERO_IMPL
+#undef __bzero
+#define __bzero __bzero_power7
 #include <sysdeps/powerpc/powerpc64/power7/memset.S>

sysdeps/powerpc/powerpc64/power4/memset.S

@@ -235,15 +235,14 @@ 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)
 	CALL_MCOUNT 3
 	mr	r5,r4
 	li	r4,0
 	b	L(_memset)
-END_GEN_TB (__bzero,TB_TOCLESS)
-
+END (__bzero)
+#ifndef __bzero
 weak_alias (__bzero, bzero)
 #endif

sysdeps/powerpc/powerpc64/power6/memset.S

@@ -379,15 +379,14 @@ 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)
 	CALL_MCOUNT 3
 	mr	r5,r4
 	li	r4,0
 	b	L(_memset)
-END_GEN_TB (__bzero,TB_TOCLESS)
-
+END (__bzero)
+#ifndef __bzero
 weak_alias (__bzero, bzero)
 #endif

sysdeps/powerpc/powerpc64/power7/memset.S

@@ -383,15 +383,14 @@ 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)
 	CALL_MCOUNT 3
 	mr	r5,r4
 	li	r4,0
 	b	L(_memset)
-END_GEN_TB (__bzero,TB_TOCLESS)
-
+END (__bzero)
+#ifndef __bzero
 weak_alias (__bzero, bzero)
 #endif