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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 .ident "%Z%%M% %I% %E% SMI" 28 29 .file "%M%" 30 31/ 32/ Wide character wcschr() implementation 33/ 34/ Algorithm based on Solaris 2.6 gen/strchr.s implementation 35/ 36/ .ident "@(#)strchr.s 1.1 92/04/17 SMI" 37/ 38 39#include <sys/asm_linkage.h> 40 41 ANSI_PRAGMA_WEAK(wcschr,function) 42 ANSI_PRAGMA_WEAK(wschr,function) 43 44#include "SYS.h" 45 46 .align 8 / accounts for .loop alignment and prolog 47 48 ENTRY(_wcschr) /* (wchar_t *s, wchar_t wc) */ 49 movq %rdi,%rax 50.loop: 51 movl (%rax),%edx / %edx = wchar of string 52 cmpl %esi,%edx / find it? 53 je .found / yes 54 testl %edx,%edx / is it null? 55 je .notfound 56 57 movl 4(%rax),%edx / %edx = wchar of string 58 cmpl %esi,%edx / find it? 59 je .found1 / yes 60 testl %edx,%edx / is it null? 61 je .notfound 62 63 movl 8(%rax),%edx / %edx = wchar of string 64 cmpl %esi,%edx / find it? 65 je .found2 / yes 66 testl %edx,%edx / is it null? 67 je .notfound 68 69 movl 12(%rax),%edx / %edx = wchar of string 70 cmpl %esi,%edx / find it? 71 je .found3 / yes 72 addq $16,%rax 73 testl %edx,%edx / is it null? 74 jne .loop 75 76.notfound: 77 xorl %eax,%eax / %rax = NULL 78 ret 79 80.found3: 81 addq $12,%rax 82 ret 83.found2: 84 addq $8,%rax 85 ret 86.found1: 87 addq $4,%rax 88.found: 89 ret 90 SET_SIZE(_wcschr) 91 92 ENTRY(_wschr) 93 jmp _wcschr / tail call into _wcschr 94 SET_SIZE(_wschr) 95