/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

/*

 * Wide character wcslen() implementation

 *

 * size_t

 * wcslen(const wchar_t *s)

 *{

 *	const wchar_t *s0 = s + 1;

 *	while (*s++)

 *		;

 *	return (s - s0);

 *}

 */	

#include <sys/asm_linkage.h>

	ANSI_PRAGMA_WEAK(wcslen,function)

	ANSI_PRAGMA_WEAK(wslen,function)

	ENTRY(wcslen)		/* (wchar_t *) */

	xorl	%eax,%eax

	.align	8

.loop:

	cmpl	$0,(%rdi)

	je	.out0

	cmpl	$0,4(%rdi)

	je	.out1

	cmpl	$0,8(%rdi)

	je	.out2

	cmpl	$0,12(%rdi)

	je	.out3

	addq	$4,%rax

	addq	$16,%rdi

	jmp	.loop

	.align	4

.out1:

	incq	%rax

.out0:		

	ret

	.align	4

.out2:

	addq	$2,%rax

	ret

	.align	4	

.out3:

	addq	$3, %rax

	ret			

	SET_SIZE(wcslen)

	ENTRY(wslen)

	jmp	wcslen		/ tail call into wcslen

	SET_SIZE(wslen)