/* 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) 1999-2018 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 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>

#include "asm-syntax.h"

#define PARMS	4		/* no space for saved regs */

#define RTN	PARMS

#define DEST	RTN

#define SRC	DEST+4

#define LEN	SRC+4

	.text

#if defined PIC && IS_IN (libc)

ENTRY_CHK (__memcpy_chk)

	movl	12(%esp), %eax

	cmpl	%eax, 16(%esp)

	jb	HIDDEN_JUMPTARGET (__chk_fail)

END_CHK (__memcpy_chk)

#endif

ENTRY (memcpy)

	movl	%edi, %eax

	movl	DEST(%esp), %edi

	movl	%esi, %edx

	movl	SRC(%esp), %esi

	movl	%edi, %ecx

	xorl	%esi, %ecx

	andl	$3, %ecx

	movl	LEN(%esp), %ecx

	cld

	jne	.Lunaligned

	cmpl	$3, %ecx

	jbe	.Lunaligned

	testl	$3, %esi

	je	1f

	movsb

	decl	%ecx

	testl	$3, %esi

	je	1f

	movsb

	decl	%ecx

	testl	$3, %esi

	je	1f

	movsb

	decl	%ecx

1:	pushl	%eax

	movl	%ecx, %eax

	shrl	$2, %ecx

	andl	$3, %eax

	rep

	movsl

	movl	%eax, %ecx

	rep

	movsb

	popl	%eax

.Lend:	movl	%eax, %edi

	movl	%edx, %esi

	movl	DEST(%esp), %eax

	ret

	/* When we come here the pointers do not have the same

	   alignment or the length is too short.  No need to optimize for

	   aligned memory accesses. */

.Lunaligned:

	shrl	$1, %ecx

	jnc	1f

	movsb

1:	shrl	$1, %ecx

	jnc	2f

	movsw

2:	rep

	movsl

	jmp	.Lend

END (memcpy)

libc_hidden_builtin_def (memcpy)