[PATCH 06/19] PowerPC: multiarch memchr for PowerPC32

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

2013-10-30  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>

 	* string/memchr.c (__memchr): Using macro to redefine symbol name.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memchr-power7.S: New
	file.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memchr-ppc32.c: New File.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memchr.c: New file:
	multiarch memchr for PPC32.
	* sysdeps/powerpc/powerpc32/power4/multiarch/Makefile: Add memchr
	multiarch objects.
	* sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Likewise.

--

diff --git a/string/memchr.c b/string/memchr.c
index 2427c4b..7a09de8 100644
--- a/string/memchr.c
+++ b/string/memchr.c
@@ -51,9 +51,13 @@
 #undef memchr
 #undef __memchr
 
+#ifndef MEMCHR
+# define MEMCHR __memchr
+#endif
+
 /* Search no more than N bytes of S for C.  */
 __ptr_t
-__memchr (s, c_in, n)
+MEMCHR (s, c_in, n)
      const __ptr_t s;
      int c_in;
      size_t n;
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
index ba88f0f..31466a0 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
@@ -2,5 +2,6 @@ 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 mempcpy-power7 mempcpy-ppc32
+		   bzero-ppc32 mempcpy-power7 mempcpy-ppc32 memchr-power7 \
+		   memchr-ppc32
 endif
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
index da5f244..33ac710 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
@@ -91,5 +91,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 	      IFUNC_IMPL_ADD (array, i, mempcpy, 1,
 			      __mempcpy_ppc))
 
+  /* Support sysdeps/powerpc/powerpc32/power4/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/powerpc32/power4/multiarch/memchr-power7.S b/sysdeps/powerpc/powerpc32/power4/multiarch/memchr-power7.S
new file mode 100644
index 0000000..a8a077d
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memchr-power7.S
@@ -0,0 +1,40 @@
+/* Optimized memchr implementation for PowerPC32/POWER7 using cmpb insn.
+   Copyright (C) 2010-2013 Free Software Foundation, Inc.
+   Contributed by Luis Machado <luisgpm@br.ibm.com>.
+   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)						\
+ .globl C_SYMBOL_NAME(__memchr_power7);				\
+ .type C_SYMBOL_NAME(__memchr_power7),@function;		\
+ C_LABEL(__memchr_power7)					\
+ cfi_startproc;
+
+#undef END
+#define END(name)						\
+ cfi_endproc;							\
+ ASM_SIZE_DIRECTIVE(__memchr_power7)
+
+#undef weak_alias
+#define weak_alias(name, alias)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#include <sysdeps/powerpc/powerpc32/power7/memchr.S>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memchr-ppc32.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memchr-ppc32.c
new file mode 100644
index 0000000..8f11ea8
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memchr-ppc32.c
@@ -0,0 +1,34 @@
+/* PowerPC32 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 <string.h>
+
+#define MEMCHR  __memchr_ppc
+
+#undef weak_alias
+#define weak_alias(a, b)
+
+#ifdef SHARED
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name)  \
+  __hidden_ver1 (__memchr_ppc, __GI_memchr, __memchr_ppc);
+#endif
+
+extern __typeof (memchr) __memchr_ppc attribute_hidden;
+
+#include <string/memchr.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memchr.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memchr.c
new file mode 100644
index 0000000..a4237f3
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/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