[PATCH 15/21] PowerPC: multiarch strchrnul 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 strchrnul
	multiarch implementations.
	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/strchrnul-power7.S: New file.
	* sysdeps/powerpc/powerpc64/multiarch/strchrnul-ppc64.c: New file.
	* sysdeps/powerpc/powerpc64/multiarch/strchrnul.c: New file:
	multiarch strchrnul for PPC64.

--

diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 2de18dd..796d507 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -8,7 +8,8 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
 		   rawmemchr-ppc64 strlen-power7 strlen-ppc64 strnlen-power7 \
 		   strnlen-ppc64 strcasecmp-power7 strcasecmp_l-power7 \
 		   strncase-power7 strncase_l-power7 strncmp-power7 \
-		   strncmp-power4 strncmp-ppc64 strchr-power7 strchr-ppc64
+		   strncmp-power4 strncmp-ppc64 strchr-power7 strchr-ppc64 \
+		   strchrnul-power7 strchrnul-ppc64
 
 CFLAGS-strncase-power7.c += -mcpu=power7 -funroll-loops
 CFLAGS-strncase_l-power7.c += -mcpu=power7 -funroll-loops
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index a029488..1b7479d 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -94,6 +94,14 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __strchr_power7)
 	      IFUNC_IMPL_ADD (array, i, strchr, 1,
 			      __strchr_ppc))
+
+  /* Support sysdeps/powerpc/powerpc64/multiarch/strchrnul.c.  */
+  IFUNC_IMPL (i, name, strchrnul,
+	      IFUNC_IMPL_ADD (array, i, strchrnul,
+			      hwcap & PPC_FEATURE_HAS_VSX,
+			      __strchrnul_power7)
+	      IFUNC_IMPL_ADD (array, i, strchrnul, 1,
+			      __strchrnul_ppc))
 #endif
 
   /* Support sysdeps/powerpc/powerpc64/multiarch/memcmp.c.  */
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchrnul-power7.S b/sysdeps/powerpc/powerpc64/multiarch/strchrnul-power7.S
new file mode 100644
index 0000000..9454b0c
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchrnul-power7.S
@@ -0,0 +1,39 @@
+/* Optimized strchrnul 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 ENTRY
+#define ENTRY(name)						\
+  .section ".text";						\
+  ENTRY_2(__strchrnul_power7)					\
+  .align ALIGNARG(2);						\
+  BODY_LABEL(__strchrnul_power7):				\
+  cfi_startproc;						\
+  LOCALENTRY(__strchrnul_power7)
+
+#undef END
+#define END(name)						\
+  cfi_endproc;							\
+  TRACEBACK(__strchrnul_power7)					\
+  END_2(__strchrnul_power7)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#include <sysdeps/powerpc/powerpc64/power7/strchrnul.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchrnul-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/strchrnul-ppc64.c
new file mode 100644
index 0000000..7172ddf
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchrnul-ppc64.c
@@ -0,0 +1,19 @@
+/* PowerPC64 default implementation of strchrnul.
+   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/strchrnul-ppc32.c>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c b/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c
new file mode 100644
index 0000000..9513858
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchrnul.c
@@ -0,0 +1,37 @@
+/* Multiple versions of strchrnul.
+   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 (__strchrnul) __strchrnul_ppc attribute_hidden;
+extern __typeof (__strchrnul) __strchrnul_power7 attribute_hidden;
+
+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
+   ifunc symbol properly.  */
+libc_ifunc (__strchrnul,
+	    (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __strchrnul_power7
+            : __strchrnul_ppc);
+
+weak_alias (__strchrnul, strchrnul)
+#else
+#include <string/strchrnul.c>
+#endif