[PATCH 05/21] PowerPC: multiarch mempcpy for PowerPC64

[Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>]

2013-12-09  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>

	* sysdeps/powerpc/powerpc64/multiarch/Makefile: Add mempcpy multiarch
	implementation.
	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/mempcpy-power7.S: New file.
	* sysdeps/powerpc/powerpc64/multiarch/mempcpy-ppc64.c: New file.
	* sysdeps/powerpc/powerpc64/multiarch/mempcpy.c: New file: multiarch
	mempcpy for PPC64.

--

diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 2d06551..d9f14a5 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -2,5 +2,6 @@ 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 bzero-power4 bzero-power6 bzero-power7 \
+		   mempcpy-power7 mempcpy-ppc64
 endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 5f277c1..4880564 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -90,5 +90,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __bzero_power4)
 	      IFUNC_IMPL_ADD (array, i, bzero, 1, __bzero_ppc))
 
+  /* Support sysdeps/powerpc/powerpc64/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;
 }
diff --git a/sysdeps/powerpc/powerpc64/multiarch/mempcpy-power7.S b/sysdeps/powerpc/powerpc64/multiarch/mempcpy-power7.S
new file mode 100644
index 0000000..6d7f002
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/mempcpy-power7.S
@@ -0,0 +1,42 @@
+/* Optimized mempcpy implementation for PowerPC/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(__mempcpy_power7)					\
+  .align ALIGNARG(alignt);					\
+  EALIGN_W_##words;						\
+  BODY_LABEL(__mempcpy_power7):					\
+  cfi_startproc;						\
+  LOCALENTRY(__mempcpy_power7)
+
+#undef END_GEN_TB
+#define END_GEN_TB(name, mask)					\
+  cfi_endproc;							\
+  TRACEBACK_MASK(__mempcpy_power7,mask)				\
+  END_2(__mempcpy_power7)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+#undef weak_alias
+#define weak_alias(name, alias)
+
+#include <sysdeps/powerpc/powerpc64/power7/mempcpy.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/mempcpy-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/mempcpy-ppc64.c
new file mode 100644
index 0000000..40f6c42
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/mempcpy-ppc64.c
@@ -0,0 +1,19 @@
+/* PowerPC64 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/>.  */
+
+#include <sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy-ppc32.c>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/mempcpy.c b/sysdeps/powerpc/powerpc64/multiarch/mempcpy.c
new file mode 100644
index 0000000..7100eb5
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/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