1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 .ident "%Z%%M% %I% %E% SMI" 28 29 .file "%M%" 30 31/* 32 * Wide character wcslen() implementation 33 * 34 * size_t 35 * _wcslen(const wchar_t *s) 36 *{ 37 * const wchar_t *s0 = s + 1; 38 * while (*s++) 39 * ; 40 * return (s - s0); 41 *} 42 */ 43 44#include <sys/asm_linkage.h> 45 46 ANSI_PRAGMA_WEAK(wcslen,function) 47 ANSI_PRAGMA_WEAK(wslen,function) 48 49#include "SYS.h" 50 51 ENTRY(_wcslen) /* (wchar_t *) */ 52 xorl %eax,%eax 53 54 .align 8 55.loop: 56 cmpl $0,(%rdi) 57 je .out0 58 cmpl $0,4(%rdi) 59 je .out1 60 cmpl $0,8(%rdi) 61 je .out2 62 cmpl $0,12(%rdi) 63 je .out3 64 addq $4,%rax 65 addq $16,%rdi 66 jmp .loop 67 68 .align 4 69.out1: 70 incq %rax 71.out0: 72 ret 73 74 .align 4 75.out2: 76 addq $2,%rax 77 ret 78 79 .align 4 80.out3: 81 addq $3, %rax 82 ret 83 SET_SIZE(_wcslen) 84 85 ENTRY(_wslen) 86 jmp _wcslen / tail call into _wcslen 87 SET_SIZE(_wslen) 88