[PATCH 06/21] PowerPC: multiarch memchr 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 memchr multiarch
	implementation.
	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/memchr-power7.S: New file.
	* sysdeps/powerpc/powerpc64/multiarch/memchr-ppc64.c: New file.
	* sysdeps/powerpc/powerpc64/multiarch/memchr.c: New file: multiarch
	memchr for PPC64.

--

diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index d9f14a5..13de9fe 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -3,5 +3,5 @@ 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 \
-		   mempcpy-power7 mempcpy-ppc64
+		   mempcpy-power7 mempcpy-ppc64 memchr-power7 memchr-ppc64
 endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 4880564..3a16bb1 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -98,5 +98,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 	      IFUNC_IMPL_ADD (array, i, mempcpy, 1,
 			      __mempcpy_ppc))
 
+  /* Support sysdeps/powerpc/powerpc64/multiarch/memchr.c.  */
+  IFUNC_IMPL (i, name, memchr,
+	      IFUNC_IMPL_ADD (array, i, memchr,
+			      hwcap & PPC_FEATURE_HAS_VSX,
+			      __memchr_power7)
+	      IFUNC_IMPL_ADD (array, i, memchr, 1,
+			      __memchr_ppc))
+
   return i;
 }
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memchr-power7.S b/sysdeps/powerpc/powerpc64/multiarch/memchr-power7.S
new file mode 100644
index 0000000..094e2cf
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memchr-power7.S
@@ -0,0 +1,41 @@
+/* Optimized memchr 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 ENTRY
+#define ENTRY(name)						\
+  .section ".text";						\
+  ENTRY_2(__memchr_power7)					\
+  .align ALIGNARG(2);						\
+  BODY_LABEL(__memchr_power7):					\
+  cfi_startproc;						\
+  LOCALENTRY(__memchr_power7)
+
+#undef END
+#define END(name)						\
+  cfi_endproc;							\
+  TRACEBACK(__memchr_power7)					\
+  END_2(__memchr_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/memchr.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memchr-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/memchr-ppc64.c
new file mode 100644
index 0000000..8ec14c6
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memchr-ppc64.c
@@ -0,0 +1,19 @@
+/* PowerPC64 default implementation of memchr.
+   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/memchr-ppc32.c>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memchr.c b/sysdeps/powerpc/powerpc64/multiarch/memchr.c
new file mode 100644
index 0000000..a4237f3
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/memchr.c
@@ -0,0 +1,38 @@
+/* Multiple versions of memchr.
+   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 (__memchr) __memchr_ppc attribute_hidden;
+extern __typeof (__memchr) __memchr_power7 attribute_hidden;
+
+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
+   ifunc symbol properly.  */
+libc_ifunc (__memchr,
+	    (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __memchr_power7
+            : __memchr_ppc);
+
+weak_alias (__memchr, memchr)
+libc_hidden_builtin_def (memchr)
+#else
+#include <string/memchr.c>
+#endif