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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, 2000 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"
#include "bp-sym.h"
#include "bp-asm.h"
#define PARMS LINKAGE /* no space for saved regs */
#define RTN PARMS
#define DEST RTN+RTN_SIZE
#define SRC DEST+PTR_SIZE
#define LEN SRC+PTR_SIZE
.text
ENTRY (BP_SYM (memcpy))
ENTER
movl LEN(%esp), %ecx
movl %edi, %eax
movl DEST(%esp), %edi
movl %esi, %edx
movl SRC(%esp), %esi
CHECK_BOUNDS_BOTH_WIDE (%edi, DEST(%esp), %ecx)
CHECK_BOUNDS_BOTH_WIDE (%esi, SRC(%esp), %ecx)
cld
shrl $1, %ecx
jnc 1f
movsb
1: shrl $1, %ecx
jnc 2f
movsw
2: rep
movsl
movl %eax, %edi
movl %edx, %esi
movl DEST(%esp), %eax
RETURN_BOUNDED_POINTER (DEST(%esp))
LEAVE
RET_PTR
END (BP_SYM (memcpy))
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