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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma 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 37#include <sys/asm_linkage.h> 38 39 ANSI_PRAGMA_WEAK(wcschr,function) 40 ANSI_PRAGMA_WEAK(wschr,function) 41 42 .align 8 / accounts for .loop alignment and prolog 43 44 ENTRY(wcschr) /* (wchar_t *s, wchar_t wc) */ 45 movq %rdi,%rax 46.loop: 47 movl (%rax),%edx / %edx = wchar of string 48 cmpl %esi,%edx / find it? 49 je .found / yes 50 testl %edx,%edx / is it null? 51 je .notfound 52 53 movl 4(%rax),%edx / %edx = wchar of string 54 cmpl %esi,%edx / find it? 55 je .found1 / yes 56 testl %edx,%edx / is it null? 57 je .notfound 58 59 movl 8(%rax),%edx / %edx = wchar of string 60 cmpl %esi,%edx / find it? 61 je .found2 / yes 62 testl %edx,%edx / is it null? 63 je .notfound 64 65 movl 12(%rax),%edx / %edx = wchar of string 66 cmpl %esi,%edx / find it? 67 je .found3 / yes 68 addq $16,%rax 69 testl %edx,%edx / is it null? 70 jne .loop 71 72.notfound: 73 xorl %eax,%eax / %rax = NULL 74 ret 75 76.found3: 77 addq $12,%rax 78 ret 79.found2: 80 addq $8,%rax 81 ret 82.found1: 83 addq $4,%rax 84.found: 85 ret 86 SET_SIZE(wcschr) 87 88 ENTRY(wschr) 89 jmp wcschr / tail call into wcschr 90 SET_SIZE(wschr) 91