PowerPC: multiarch mempcpy for PowerPC32

ChangeLog

@@ -1,3 +1,17 @@
+2013-12-06  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
+
+	* string/mempcpy.c (__mempcpy): Using macro to redefine symbol name.
+	* sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy-power7.S: New
+	file.
+	* sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy-ppc32.c: New
+	file.
+	* sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c: New
+	file: multiarch mempcpy for PPC32.
+	* sysdeps/powerpc/powerpc32/power4/multiarch/Makefile: Add mempcpy
+	multiarch objects.
+	* sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
+	(__libc_ifunc_impl_list): Likewise.
+
 2013-12-06  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
 
 	* sysdeps/powerpc/powerpc32/power4/multiarch/bzero-power6.S: New file.

string/mempcpy.c

@@ -24,8 +24,12 @@
 #undef mempcpy
 #undef __mempcpy
 
+#ifndef MEMPCPY
+# define MEMPCPY __mempcpy
+#endif
+
 void *
-__mempcpy (void *dest, const void *src, size_t len)
+MEMPCPY (void *dest, const void *src, size_t len)
 {
   return memcpy (dest, src, len) + len;
 }

sysdeps/powerpc/powerpc32/power4/multiarch/Makefile

@@ -2,5 +2,5 @@ ifeq ($(subdir),string)
 sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
 		   memcpy-ppc32 memcmp-power7 memcmp-ppc32 memset-power7 \
 		   memset-power6 memset-ppc32 bzero-power7 bzero-power6 \
-		   bzero-ppc32
+		   bzero-ppc32 mempcpy-power7 mempcpy-ppc32
 endif

sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c

@@ -83,5 +83,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __memcmp_power7)
 	      IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_ppc))
 
+  /* Support sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c.  */
+  IFUNC_IMPL (i, name, mempcpy,
+	      IFUNC_IMPL_ADD (array, i, mempcpy,
+			      hwcap & PPC_FEATURE_HAS_VSX,
+			      __mempcpy_power7)
+	      IFUNC_IMPL_ADD (array, i, mempcpy, 1,
+			      __mempcpy_ppc))
+
   return i;
 }

sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy-power7.S

@@ -0,0 +1,35 @@
+/* Optimized mempcpy implementation for 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)				\
+ .globl C_SYMBOL_NAME(__mempcpy_power7);			\
+ .type C_SYMBOL_NAME(__mempcpy_power7),@function;		\
+ .align ALIGNARG(alignt);					\
+ EALIGN_W_##words;						\
+ C_LABEL(__mempcpy_power7)					\
+ cfi_startproc;
+
+#undef END
+#define END(name)						\
+ cfi_endproc;							\
+ ASM_SIZE_DIRECTIVE(__mempcpy_power7)
+
+#include <sysdeps/powerpc/powerpc32/power7/mempcpy.S>

sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy-ppc32.c

@@ -0,0 +1,32 @@
+/* PowerPC32 default implementation of mempcpy.
+   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 MEMPCPY  __mempcpy_ppc
+
+#undef libc_hidden_def
+#define libc_hidden_def(name)
+#undef weak_alias
+#define weak_alias(a, b)
+
+#if defined SHARED
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name)  \
+  __hidden_ver1 (__mempcpy_ppc, __GI_mempcpy, __mempcpy_ppc);
+#endif
+
+#include <string/mempcpy.c>

sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c

@@ -0,0 +1,38 @@
+/* Multiple versions of mempcpy.
+   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/>.  */
+
+#ifndef NOT_IN_libc
+# include <string.h>
+# include <shlib-compat.h>
+# include "init-arch.h"
+
+extern __typeof (__mempcpy) __mempcpy_ppc attribute_hidden;
+extern __typeof (__mempcpy) __mempcpy_power7 attribute_hidden;
+
+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
+   ifunc symbol properly.  */
+libc_ifunc (__mempcpy,
+	    (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __mempcpy_power7
+            : __mempcpy_ppc);
+
+weak_alias (__mempcpy, mempcpy)
+libc_hidden_def (mempcpy)
+#else
+# include <string/mempcpy.c>
+#endif