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 * wchar_t * 32 * wcschr(const wchar_t *s, wchar_t c) -- 33 * Return pointer to first occurrence of the character `c' in the wide 34 * character string `s', or NULL if not found. 35 */ 36ENTRY(wcschr) 37 movl 4(%esp),%ecx /* String */ 38 movl 8(%esp),%eax /* Character */ 39 pushl %ebx 40.p2align 4,0x90 41L1: movl (%ecx),%ebx 42 cmpl %eax,%ebx 43 je found0 44 testl %ebx,%ebx 45 jz no 46 movl 4(%ecx),%ebx 47 cmpl %eax,%ebx 48 je found1 49 testl %ebx,%ebx 50 jz no 51 movl 8(%ecx),%ebx 52 cmpl %eax,%ebx 53 je found2 54 testl %ebx,%ebx 55 jz no 56 movl 12(%ecx),%ebx 57 cmpl %eax,%ebx 58 je found3 59 testl %ebx,%ebx 60 jz no 61 leal 16(%ecx),%ecx 62 jmp L1 63.p2align 2,0x90 64found3: leal 4(%ecx),%ecx 65.p2align 2,0x90 66found2: leal 4(%ecx),%ecx 67.p2align 2,0x90 68found1: leal 4(%ecx),%ecx 69.p2align 2,0x90 70found0: popl %ebx 71 movl %ecx,%eax 72 ret 73.p2align 2,0x90 74no: popl %ebx 75 xorl %eax,%eax 76 ret 77