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[PATCH 10/19] PowerPC: multiarch strnlen for PowerPC32

From: Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>
To: "GNU C. Library" <libc-alpha at sourceware dot org>
Date: Thu, 31 Oct 2013 10:11:57 -0200
Subject: [PATCH 10/19] PowerPC: multiarch strnlen for PowerPC32
Authentication-results: sourceware.org; auth=none
References: <52724052 dot 3070609 at linux dot vnet dot ibm dot com>
2013-08-19  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>

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

--

diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
index cddb9bf..b84f867 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
@@ -4,5 +4,6 @@ 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 strlen-power7 strlen-ppc32
+		   rawmemchr-ppc32 strlen-power7 strlen-ppc32 strnlen-power7 \
+		   strnlen-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 63dadad..b2c6691 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
@@ -81,6 +81,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __strlen_power7)
 	      IFUNC_IMPL_ADD (array, i, strlen, 1,
 			      __strlen_ppc))
+
+  /* Support sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c.  */
+  IFUNC_IMPL (i, name, strnlen,
+	      IFUNC_IMPL_ADD (array, i, strnlen, hwcap & PPC_FEATURE_HAS_VSX,
+			      __strnlen_power7)
+	      IFUNC_IMPL_ADD (array, i, strnlen, 1,
+			      __strnlen_ppc))
 #endif
 
   /* Support sysdeps/powerpc/powerpc32/power4/multiarch/memcmp.c.  */
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/rtld-strnlen.c b/sysdeps/powerpc/powerpc32/power4/multiarch/rtld-strnlen.c
new file mode 100644
index 0000000..11a7203
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/rtld-strnlen.c
@@ -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 <string/strnlen.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-power7.S b/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-power7.S
new file mode 100644
index 0000000..7b09e7d
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-power7.S
@@ -0,0 +1,37 @@
+/* Optimized strnlen 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(__strnlen_power7);			\
+ .type C_SYMBOL_NAME(__strnlen_power7),@function;		\
+ C_LABEL(__strnlen_power7)					\
+ cfi_startproc;
+
+#undef END
+#define END(name)						\
+ cfi_endproc;							\
+ ASM_SIZE_DIRECTIVE(__strnlen_power7)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#include <sysdeps/powerpc/powerpc32/power7/strnlen.S>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-ppc32.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-ppc32.c
new file mode 100644
index 0000000..43d8276
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-ppc32.c
@@ -0,0 +1,26 @@
+/* Default strnlen 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/>.  */
+
+#define STRNLEN  __strnlen_ppc
+#ifdef SHARED
+# undef libc_hidden_def
+# define libc_hidden_def(name)  \
+    __hidden_ver1 (__strnlen_ppc, __GI_strnlen, __strnlen_ppc);
+#endif
+
+#include <string/strnlen.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c b/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c
new file mode 100644
index 0000000..b2ec1aa
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/strnlen.c
@@ -0,0 +1,33 @@
+/* Multiple versions of strnlen.
+   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 (__strnlen) __strnlen_ppc attribute_hidden;
+extern __typeof (__strnlen) __strnlen_power7 attribute_hidden;
+
+libc_ifunc (__strnlen,
+            (hwcap & PPC_FEATURE_HAS_VSX)
+            ? __strnlen_power7
+            : __strnlen_ppc);
+weak_alias (__strnlen, strnlen)
+libc_hidden_def (strnlen)
+#endif
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