1/*- 2 * Copyright (c) 2003 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <machine/asm.h> 28__FBSDID("$FreeBSD$"); 29 30/* 31 * size_t 32 * wcslen(const wchar_t *s) -- 33 * Find the length of a wide character string. 34 */ 35ENTRY(wcslen) 36 movl 4(%esp),%ecx /* String */ 37 pushl %ebx 38 xorl %ebx,%ebx 39 xorl %eax,%eax 40.p2align 4,0x90 41L1: cmpl %ebx,(%ecx) 42 jz found0 43 cmpl %ebx,4(%ecx) 44 jz found1 45 cmpl %ebx,8(%ecx) 46 jz found2 47 cmpl %ebx,12(%ecx) 48 jz found3 49 cmpl %ebx,16(%ecx) 50 jz found4 51 cmpl %ebx,20(%ecx) 52 jz found5 53 cmpl %ebx,24(%ecx) 54 jz found6 55 cmpl %ebx,28(%ecx) 56 jz found7 57 leal 32(%ecx),%ecx 58 addl $8,%eax 59 jmp L1 60found7: incl %eax 61found6: incl %eax 62found5: incl %eax 63found4: incl %eax 64found3: incl %eax 65found2: incl %eax 66found1: incl %eax 67found0: popl %ebx 68 ret 69END(wcslen) 70 71 .section .note.GNU-stack,"",%progbits 72