1*5d9d9091SRichard Lowe/* 2*5d9d9091SRichard Lowe * CDDL HEADER START 3*5d9d9091SRichard Lowe * 4*5d9d9091SRichard Lowe * The contents of this file are subject to the terms of the 5*5d9d9091SRichard Lowe * Common Development and Distribution License (the "License"). 6*5d9d9091SRichard Lowe * You may not use this file except in compliance with the License. 7*5d9d9091SRichard Lowe * 8*5d9d9091SRichard Lowe * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*5d9d9091SRichard Lowe * or http://www.opensolaris.org/os/licensing. 10*5d9d9091SRichard Lowe * See the License for the specific language governing permissions 11*5d9d9091SRichard Lowe * and limitations under the License. 12*5d9d9091SRichard Lowe * 13*5d9d9091SRichard Lowe * When distributing Covered Code, include this CDDL HEADER in each 14*5d9d9091SRichard Lowe * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*5d9d9091SRichard Lowe * If applicable, add the following below this CDDL HEADER, with the 16*5d9d9091SRichard Lowe * fields enclosed by brackets "[]" replaced with your own identifying 17*5d9d9091SRichard Lowe * information: Portions Copyright [yyyy] [name of copyright owner] 18*5d9d9091SRichard Lowe * 19*5d9d9091SRichard Lowe * CDDL HEADER END 20*5d9d9091SRichard Lowe */ 21*5d9d9091SRichard Lowe/* 22*5d9d9091SRichard Lowe * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 23*5d9d9091SRichard Lowe * Use is subject to license terms. 24*5d9d9091SRichard Lowe */ 25*5d9d9091SRichard Lowe 26*5d9d9091SRichard Lowe .file "strchr.s" 27*5d9d9091SRichard Lowe 28*5d9d9091SRichard Lowe#include "SYS.h" 29*5d9d9091SRichard Lowe 30*5d9d9091SRichard Lowe ENTRY(strchr) /* (char *, char) */ 31*5d9d9091SRichard Lowe.loop: 32*5d9d9091SRichard Lowe movb (%rdi),%dl / %dl = byte of string 33*5d9d9091SRichard Lowe cmpb %sil,%dl / find it? 34*5d9d9091SRichard Lowe je .found / yes 35*5d9d9091SRichard Lowe testb %dl,%dl / is it null? 36*5d9d9091SRichard Lowe je .notfound 37*5d9d9091SRichard Lowe 38*5d9d9091SRichard Lowe movb 1(%rdi),%dl / %dl = byte of string 39*5d9d9091SRichard Lowe cmpb %sil,%dl / find it? 40*5d9d9091SRichard Lowe je .found1 / yes 41*5d9d9091SRichard Lowe testb %dl,%dl / is it null? 42*5d9d9091SRichard Lowe je .notfound 43*5d9d9091SRichard Lowe 44*5d9d9091SRichard Lowe movb 2(%rdi),%dl / %dl = byte of string 45*5d9d9091SRichard Lowe cmpb %sil,%dl / find it? 46*5d9d9091SRichard Lowe je .found2 / yes 47*5d9d9091SRichard Lowe testb %dl,%dl / is it null? 48*5d9d9091SRichard Lowe je .notfound 49*5d9d9091SRichard Lowe 50*5d9d9091SRichard Lowe movb 3(%rdi),%dl / %dl = byte of string 51*5d9d9091SRichard Lowe cmpb %sil,%dl / find it? 52*5d9d9091SRichard Lowe je .found3 / yes 53*5d9d9091SRichard Lowe addq $4,%rdi 54*5d9d9091SRichard Lowe testb %dl,%dl / is it null? 55*5d9d9091SRichard Lowe jne .loop 56*5d9d9091SRichard Lowe 57*5d9d9091SRichard Lowe.notfound: 58*5d9d9091SRichard Lowe xorl %eax,%eax / %rax = NULL 59*5d9d9091SRichard Lowe ret 60*5d9d9091SRichard Lowe 61*5d9d9091SRichard Lowe.found3: 62*5d9d9091SRichard Lowe incq %rdi 63*5d9d9091SRichard Lowe.found2: 64*5d9d9091SRichard Lowe incq %rdi 65*5d9d9091SRichard Lowe.found1: 66*5d9d9091SRichard Lowe incq %rdi 67*5d9d9091SRichard Lowe.found: 68*5d9d9091SRichard Lowe movq %rdi,%rax 69*5d9d9091SRichard Lowe ret 70*5d9d9091SRichard Lowe SET_SIZE(strchr) 71