11849Swollman/* 21849Swollman * Copyright (c) 1993 Winning Strategies, Inc. 31849Swollman * All rights reserved. 41849Swollman * 51849Swollman * Redistribution and use in source and binary forms, with or without 61849Swollman * modification, are permitted provided that the following conditions 71849Swollman * are met: 81849Swollman * 1. Redistributions of source code must retain the above copyright 91849Swollman * notice, this list of conditions and the following disclaimer. 101849Swollman * 2. Redistributions in binary form must reproduce the above copyright 111849Swollman * notice, this list of conditions and the following disclaimer in the 121849Swollman * documentation and/or other materials provided with the distribution. 131849Swollman * 3. All advertising materials mentioning features or use of this software 141849Swollman * must display the following acknowledgement: 151849Swollman * This product includes software developed by Winning Strategies, Inc. 161849Swollman * 4. The name of the author may not be used to endorse or promote products 1797748Sschweikh * derived from this software without specific prior written permission 181849Swollman * 191849Swollman * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 201849Swollman * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 211849Swollman * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 221849Swollman * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 231849Swollman * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 241849Swollman * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 251849Swollman * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 261849Swollman * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 271849Swollman * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 281849Swollman * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 291849Swollman */ 301849Swollman 3185437Speter#include <machine/asm.h> 3293000Sobrien__FBSDID("$FreeBSD$"); 331849Swollman 341849Swollman/* 351849Swollman * strchr(s, c) 36249582Sgabor * return a pointer to the first occurrence of the character c in 371849Swollman * string s, or NULL if c does not occur in the string. 381849Swollman * 391849Swollman * %edx - pointer iterating through string 40249582Sgabor * %eax - pointer to first occurrence of 'c' 411849Swollman * %cl - character we're comparing against 421849Swollman * %bl - character at %edx 431849Swollman * 441849Swollman * Written by: 451849Swollman * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc. 461849Swollman */ 471849Swollman 481849SwollmanENTRY(strchr) 491849Swollman pushl %ebx 501849Swollman movl 8(%esp),%eax 511849Swollman movb 12(%esp),%cl 521849Swollman .align 2,0x90 531849SwollmanL1: 541849Swollman movb (%eax),%bl 551849Swollman cmpb %bl,%cl /* found char??? */ 561849Swollman je L2 571849Swollman incl %eax 581849Swollman testb %bl,%bl /* null terminator??? */ 591849Swollman jne L1 601849Swollman xorl %eax,%eax 611849SwollmanL2: 621849Swollman popl %ebx 631849Swollman ret 64184548SpeterEND(strchr) 65217106Skib 66229571SedWEAK_ALIAS(index, strchr) 67229368Sed 68217106Skib .section .note.GNU-stack,"",%progbits 69