[PATCH 03/19] PowerPC: multiarch memcmp for PowerPC32

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

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

	* sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-power7.S: New
	file.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-ppc32.S: New file.
	* sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c: multiarch
	memcmp for PPC32.
	* sysdeps/powerpc/powerpc32/power4/multiarch/rtld-memcmp.S: New file.
	* sysdeps/powerpc/powerpc32/power4/multiarch/Makefile: Add memcmp
	multiarch objects.
	* sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Likewise.

---

diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
index 79ef7c7..ac7df08 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
@@ -1,4 +1,4 @@
 ifeq ($(subdir),string)
 sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
-		   memcpy-ppc32
+		   memcpy-ppc32 memcmp-power7 memcmp-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 470439f..a4ff4c3 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
@@ -60,5 +60,11 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_ppc))
 #endif
 
+  /* Support sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c.  */
+  IFUNC_IMPL (i, name, memcmp,
+	      IFUNC_IMPL_ADD (array, i, memcmp, hwcap & PPC_FEATURE_HAS_VSX,
+			      __memcmp_power7)
+	      IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_ppc))
+
   return i;
 }
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-power7.S b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-power7.S
new file mode 100644
index 0000000..464d5e8
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-power7.S
@@ -0,0 +1,41 @@
+/* Optimized memcmp implementation for POWER7/PowerPC32.
+   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)				\
+ .globl C_SYMBOL_NAME(__memcmp_power7);				\
+ .type C_SYMBOL_NAME(__memcmp_power7),@function;		\
+ .align ALIGNARG(alignt);					\
+ EALIGN_W_##words;						\
+ C_LABEL(__memcmp_power7)					\
+ cfi_startproc;
+
+#undef END
+#define END(name)						\
+ cfi_endproc;							\
+ ASM_SIZE_DIRECTIVE(__memcmp_power7)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#undef weak_alias
+#define weak_alias(a, b)
+
+#include <sysdeps/powerpc/powerpc32/power7/memcmp.S>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-ppc32.S b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-ppc32.S
new file mode 100644
index 0000000..bb92264
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp-ppc32.S
@@ -0,0 +1,45 @@
+/* Default memcmp implementation for PowerPC32.
+   Copyright (C) 1997-2013 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>
+
+#ifndef NOT_IN_libc
+# undef EALIGN
+# define EALIGN(name, alignt, words)				\
+  .globl C_SYMBOL_NAME(__memcmp_ppc);				\
+  .type C_SYMBOL_NAME(__memcmp_ppc),@function;		\
+  .align ALIGNARG(alignt);					\
+  EALIGN_W_##words;						\
+  C_LABEL(__memcmp_ppc)					\
+  cfi_startproc;
+
+# undef END
+# define END(name)						\
+  cfi_endproc;							\
+  ASM_SIZE_DIRECTIVE(__memcmp_ppc)
+
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name)				\
+  .globl __GI_memcmp; __GI_memcmp = __memcmp_ppc
+
+# undef weak_alias
+# define weak_alias(a, b)					\
+  .weak b ; b = __memcmp_ppc
+#endif
+
+#include <sysdeps/powerpc/powerpc32/power4/memcmp.S>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c
new file mode 100644
index 0000000..60df424
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c
@@ -0,0 +1,34 @@
+/* Multiple versions of memcmp.
+   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.  */
+#ifndef NOT_IN_libc
+# include <string.h>
+# include <shlib-compat.h>
+# include "init-arch.h"
+
+extern __typeof (memcmp) __memcmp_ppc attribute_hidden;
+extern __typeof (memcmp) __memcmp_power7 attribute_hidden;
+
+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
+   ifunc symbol properly.  */
+libc_ifunc (memcmp,
+            (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __memcmp_power7
+            : __memcmp_ppc);
+#endif
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/rtld-memcmp.S b/sysdeps/powerpc/powerpc32/power4/multiarch/rtld-memcmp.S
new file mode 100644
index 0000000..44d9c96
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/rtld-memcmp.S
@@ -0,0 +1,19 @@
+/* Loader memcmp implementation for PowerPC32.
+   Copyright (C) 1997-2013 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/memcmp.S>