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-rw-r--r--sysdeps/i386/i686/memcpy.S51
1 files changed, 51 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/memcpy.S b/sysdeps/i386/i686/memcpy.S
new file mode 100644
index 0000000000..eab6855d57
--- /dev/null
+++ b/sysdeps/i386/i686/memcpy.S
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+/* Copy memory block and return pointer to beginning of destination block
+   For Intel 80x86, x>=6.
+   This file is part of the GNU C Library.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+#include "asm-syntax.h"
+
+/* memcpy:
+	INPUT PARAMETER:
+	dest		(sp + 4)
+	src		(sp + 8)
+	len		(sp + 12)
+*/
+
+ENTRY(memcpy)
+	movl	12(%esp), %ecx
+	movl	%edi, %eax
+	movl	4(%esp), %edi
+	movl	%esi, %edx
+	movl	8(%esp), %esi
+	cld
+	shrl	$1, %ecx
+	jnc	1f
+	movsb
+1:	shrl	$1, %ecx
+	jnc	2f
+	movsw
+2:	rep
+	movsl
+	movl	%eax, %edi
+	movl	%edx, %esi
+	movl	4(%esp), %eax
+	ret
+END(memcpy)