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/* 23*5d9d9091SRichard Lowe * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24*5d9d9091SRichard Lowe * Use is subject to license terms. 25*5d9d9091SRichard Lowe */ 26*5d9d9091SRichard Lowe 27*5d9d9091SRichard Lowe .file "wschr.s" 28*5d9d9091SRichard Lowe 29*5d9d9091SRichard Lowe/ 30*5d9d9091SRichard Lowe/ Wide character wcschr() implementation 31*5d9d9091SRichard Lowe/ 32*5d9d9091SRichard Lowe/ Algorithm based on Solaris 2.6 gen/strchr.s implementation 33*5d9d9091SRichard Lowe/ 34*5d9d9091SRichard Lowe 35*5d9d9091SRichard Lowe#include <sys/asm_linkage.h> 36*5d9d9091SRichard Lowe 37*5d9d9091SRichard Lowe ANSI_PRAGMA_WEAK(wcschr,function) 38*5d9d9091SRichard Lowe ANSI_PRAGMA_WEAK(wschr,function) 39*5d9d9091SRichard Lowe 40*5d9d9091SRichard Lowe .align 8 / accounts for .loop alignment and prolog 41*5d9d9091SRichard Lowe 42*5d9d9091SRichard Lowe ENTRY(wcschr) /* (wchar_t *s, wchar_t wc) */ 43*5d9d9091SRichard Lowe movq %rdi,%rax 44*5d9d9091SRichard Lowe.loop: 45*5d9d9091SRichard Lowe movl (%rax),%edx / %edx = wchar of string 46*5d9d9091SRichard Lowe cmpl %esi,%edx / find it? 47*5d9d9091SRichard Lowe je .found / yes 48*5d9d9091SRichard Lowe testl %edx,%edx / is it null? 49*5d9d9091SRichard Lowe je .notfound 50*5d9d9091SRichard Lowe 51*5d9d9091SRichard Lowe movl 4(%rax),%edx / %edx = wchar of string 52*5d9d9091SRichard Lowe cmpl %esi,%edx / find it? 53*5d9d9091SRichard Lowe je .found1 / yes 54*5d9d9091SRichard Lowe testl %edx,%edx / is it null? 55*5d9d9091SRichard Lowe je .notfound 56*5d9d9091SRichard Lowe 57*5d9d9091SRichard Lowe movl 8(%rax),%edx / %edx = wchar of string 58*5d9d9091SRichard Lowe cmpl %esi,%edx / find it? 59*5d9d9091SRichard Lowe je .found2 / yes 60*5d9d9091SRichard Lowe testl %edx,%edx / is it null? 61*5d9d9091SRichard Lowe je .notfound 62*5d9d9091SRichard Lowe 63*5d9d9091SRichard Lowe movl 12(%rax),%edx / %edx = wchar of string 64*5d9d9091SRichard Lowe cmpl %esi,%edx / find it? 65*5d9d9091SRichard Lowe je .found3 / yes 66*5d9d9091SRichard Lowe addq $16,%rax 67*5d9d9091SRichard Lowe testl %edx,%edx / is it null? 68*5d9d9091SRichard Lowe jne .loop 69*5d9d9091SRichard Lowe 70*5d9d9091SRichard Lowe.notfound: 71*5d9d9091SRichard Lowe xorl %eax,%eax / %rax = NULL 72*5d9d9091SRichard Lowe ret 73*5d9d9091SRichard Lowe 74*5d9d9091SRichard Lowe.found3: 75*5d9d9091SRichard Lowe addq $12,%rax 76*5d9d9091SRichard Lowe ret 77*5d9d9091SRichard Lowe.found2: 78*5d9d9091SRichard Lowe addq $8,%rax 79*5d9d9091SRichard Lowe ret 80*5d9d9091SRichard Lowe.found1: 81*5d9d9091SRichard Lowe addq $4,%rax 82*5d9d9091SRichard Lowe.found: 83*5d9d9091SRichard Lowe ret 84*5d9d9091SRichard Lowe SET_SIZE(wcschr) 85*5d9d9091SRichard Lowe 86*5d9d9091SRichard Lowe ENTRY(wschr) 87*5d9d9091SRichard Lowe jmp wcschr / tail call into wcschr 88*5d9d9091SRichard Lowe SET_SIZE(wschr) 89