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[PATCH][AArch64] Inline mempcpy
- From: "Wilco Dijkstra" <wdijkstr at arm dot com>
- To: <libc-alpha at sourceware dot org>
- Date: Mon, 27 Apr 2015 12:16:09 +0100
- Subject: [PATCH][AArch64] Inline mempcpy
- Authentication-results: sourceware.org; auth=none
Add inlining of mempcpy on AArch64 to expand into memcpy.
OK for commit?
2015-04-27 Wilco Dijkstra <wdijkstr@arm.com>
* sysdeps/aarch64/bits/string.h: New file.
(_STRING_ARCH_unaligned): Define.
(mempcpy): Redirect to __mempcpy_inline.
(__mempcpy): Likewise.
(__mempcpy_inline): New function.
---
sysdeps/aarch64/bits/string.h | 50 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
create mode 100644 sysdeps/aarch64/bits/string.h
diff --git a/sysdeps/aarch64/bits/string.h b/sysdeps/aarch64/bits/string.h
new file mode 100644
index 0000000..b0dacd6
--- /dev/null
+++ b/sysdeps/aarch64/bits/string.h
@@ -0,0 +1,50 @@
+/* Optimized, inlined string functions. AArch64 version.
+ Copyright (C) 2015 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 _STRING_H
+# error "Never use <bits/string.h> directly; include <string.h> instead."
+#endif
+
+/* AArch64 implementations support efficient unaligned access. */
+#define _STRING_ARCH_unaligned 1
+
+#if !defined __NO_STRING_INLINES
+
+# ifndef __STRING_INLINE
+# ifndef __extern_inline
+# define __STRING_INLINE inline
+# else
+# define __STRING_INLINE __extern_inline
+# endif
+# endif
+
+# ifdef __USE_GNU
+# define _HAVE_STRING_ARCH_mempcpy 1
+# define mempcpy(dest, src, n) __mempcpy_inline (dest, src, n)
+# define __mempcpy(dest, src, n) __mempcpy_inline (dest, src, n)
+
+__STRING_INLINE void *
+__mempcpy_inline (void *__restrict __dest,
+ const void *__restrict __src, size_t __n)
+{
+ return memcpy (__dest, __src, __n) + __n;
+}
+
+# endif
+
+#endif
--
1.9.1