[PATCH 14/21] PowerPC: multiarch strchr 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 strchr multiarch
	implementations.
	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/rtld-strchr.S: New file.
	* sysdeps/powerpc/powerpc64/multiarch/strchr-power7.S: New file.
	* sysdeps/powerpc/powerpc64/multiarch/strchr-ppc64.S: New file.
	* sysdeps/powerpc/powerpc64/multiarch/strchr.c: New file: multiarch
	strchr for PPC64.

--

diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 06fe718..2de18dd 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -8,7 +8,7 @@ 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
+		   strncmp-power4 strncmp-ppc64 strchr-power7 strchr-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 d6b92dc..a029488 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -86,6 +86,14 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __strncmp_power4)
 	      IFUNC_IMPL_ADD (array, i, strncmp, 1,
 			      __strncmp_ppc))
+
+  /* Support sysdeps/powerpc/powerpc64/multiarch/strchr.c.  */
+  IFUNC_IMPL (i, name, strchr,
+	      IFUNC_IMPL_ADD (array, i, strchr,
+			      hwcap & PPC_FEATURE_HAS_VSX,
+			      __strchr_power7)
+	      IFUNC_IMPL_ADD (array, i, strchr, 1,
+			      __strchr_ppc))
 #endif
 
   /* Support sysdeps/powerpc/powerpc64/multiarch/memcmp.c.  */
diff --git a/sysdeps/powerpc/powerpc64/multiarch/rtld-strchr.S b/sysdeps/powerpc/powerpc64/multiarch/rtld-strchr.S
new file mode 100644
index 0000000..93f0eb4
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/rtld-strchr.S
@@ -0,0 +1,18 @@
+/* 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/powerpc64/strchr.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchr-power7.S b/sysdeps/powerpc/powerpc64/multiarch/strchr-power7.S
new file mode 100644
index 0000000..b1cf338
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchr-power7.S
@@ -0,0 +1,39 @@
+/* Optimized strchr 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(__strchr_power7)					\
+  .align ALIGNARG(2);						\
+  BODY_LABEL(__strchr_power7):					\
+  cfi_startproc;						\
+  LOCALENTRY(__strchr_power7)
+
+#undef END
+#define END(name)						\
+  cfi_endproc;							\
+  TRACEBACK(__strchr_power7)					\
+  END_2(__strchr_power7)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#include <sysdeps/powerpc/powerpc64/power7/strchr.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchr-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/strchr-ppc64.S
new file mode 100644
index 0000000..814ed87
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchr-ppc64.S
@@ -0,0 +1,42 @@
+/* PowerPC64 default implementation of strchr.
+   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>
+
+#ifdef SHARED
+# undef ENTRY
+# define ENTRY(name)						\
+  .section ".text";						\
+  ENTRY_2(__strchr_ppc)						\
+  .align ALIGNARG(2);						\
+  BODY_LABEL(__strchr_ppc):					\
+  cfi_startproc;						\
+  LOCALENTRY(__strchr_ppc)
+
+# undef END
+# define END(name)						\
+  cfi_endproc;							\
+  TRACEBACK(__strchr_ppc)					\
+  END_2(__strchr_ppc)
+
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name)				\
+    .globl __GI_strchr; __GI_strchr = __strchr_ppc
+#endif
+
+#include <sysdeps/powerpc/powerpc64/strchr.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strchr.c b/sysdeps/powerpc/powerpc64/multiarch/strchr.c
new file mode 100644
index 0000000..8a7dc74
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strchr.c
@@ -0,0 +1,35 @@
+/* Multiple versions of strchr.
+   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 multiple versions only for definition in libc.  */
+#if defined SHARED && !defined NOT_IN_libc
+# include <string.h>
+# include <shlib-compat.h>
+# include "init-arch.h"
+
+extern __typeof (strchr) __strchr_ppc attribute_hidden;
+extern __typeof (strchr) __strchr_power7 attribute_hidden;
+
+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
+   ifunc symbol properly.  */
+libc_ifunc (strchr,
+	    (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __strchr_power7
+            : __strchr_ppc);
+weak_alias (strchr, index)
+#endif