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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma 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 ENTRY(wcslen) /* (wchar_t *) */ 50 xorl %eax,%eax 51 52 .align 8 53.loop: 54 cmpl $0,(%rdi) 55 je .out0 56 cmpl $0,4(%rdi) 57 je .out1 58 cmpl $0,8(%rdi) 59 je .out2 60 cmpl $0,12(%rdi) 61 je .out3 62 addq $4,%rax 63 addq $16,%rdi 64 jmp .loop 65 66 .align 4 67.out1: 68 incq %rax 69.out0: 70 ret 71 72 .align 4 73.out2: 74 addq $2,%rax 75 ret 76 77 .align 4 78.out3: 79 addq $3, %rax 80 ret 81 SET_SIZE(wcslen) 82 83 ENTRY(wslen) 84 jmp wcslen / tail call into wcslen 85 SET_SIZE(wslen) 86