PowerPC: multiarch strlen for PowerPC32

5 files changed, 115 insertions, 1 deletions

diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
index 23b653f671..cddb9bf50f 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
@@ -4,5 +4,5 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
 		   memset-power6 memset-ppc32 bzero-power7 bzero-power6 \
 		   bzero-ppc32 mempcpy-power7 mempcpy-ppc32 memchr-power7 \
 		   memchr-ppc32 memrchr-power7 memrchr-ppc32 rawmemchr-power7 \
-		   rawmemchr-ppc32
+		   rawmemchr-ppc32 strlen-power7 strlen-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 95da674390..63dadade74 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
@@ -75,6 +75,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __bzero_power6)
 	      IFUNC_IMPL_ADD (array, i, bzero, 1, __bzero_ppc))
 
+  /* Support sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c.  */
+  IFUNC_IMPL (i, name, strlen,
+	      IFUNC_IMPL_ADD (array, i, strlen, hwcap & PPC_FEATURE_HAS_VSX,
+			      __strlen_power7)
+	      IFUNC_IMPL_ADD (array, i, strlen, 1,
+			      __strlen_ppc))
 #endif
 
   /* Support sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c.  */
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-power7.S b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-power7.S
new file mode 100644
index 0000000000..cde958aa1a
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-power7.S
@@ -0,0 +1,36 @@
+/* Optimized strlen implementation for PowerPC32/POWER7 using cmpb insn.
+   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)						\
+ .globl C_SYMBOL_NAME(__strlen_power7);				\
+ .type C_SYMBOL_NAME(__strlen_power7),@function;		\
+ C_LABEL(__strlen_power7)					\
+ cfi_startproc;
+
+#undef END
+#define END(name)						\
+ cfi_endproc;							\
+ ASM_SIZE_DIRECTIVE(__strlen_power7)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#include <sysdeps/powerpc/powerpc32/power7/strlen.S>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-ppc32.S b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-ppc32.S
new file mode 100644
index 0000000000..a94d93cfad
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen-ppc32.S
@@ -0,0 +1,41 @@
+/* Default strlen implementation for 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/>.  */
+
+#if defined SHARED && !defined NOT_IN_libc
+
+#include <sysdep.h>
+
+# undef ENTRY
+# define ENTRY(name)						\
+  .globl C_SYMBOL_NAME(__strlen_ppc);				\
+  .type C_SYMBOL_NAME(__strlen_ppc),@function;		\
+  C_LABEL(__strlen_ppc)					\
+  cfi_startproc;
+
+# undef END
+# define END(name)						\
+  cfi_endproc;							\
+  ASM_SIZE_DIRECTIVE(__strlen_ppc)
+
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name)				\
+  .globl __GI_strlen; __GI_strlen = __strlen_ppc
+
+#endif
+
+#include <sysdeps/powerpc/powerpc32/strlen.S>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c
new file mode 100644
index 0000000000..efbc0abe6f
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strlen.c
@@ -0,0 +1,31 @@
+/* Multiple versions of strlen.
+   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/>.  */
+
+#if defined SHARED && !defined NOT_IN_libc
+# include <string.h>
+# include <shlib-compat.h>
+# include "init-arch.h"
+
+extern __typeof (strlen) __strlen_ppc attribute_hidden;
+extern __typeof (strlen) __strlen_power7 attribute_hidden;
+
+libc_ifunc (strlen,
+            (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __strlen_power7
+            : __strlen_ppc);
+#endif