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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * This set of routines used to be implemented mostly in assembler. 35 * 36 * Since the purpose they have is now rather vestigial, and 64-bit 37 * machines can do operations on 64-bit quantities pretty efficiently, 38 * a C implementation seems quite adequate and much more maintainable. 39 */ 40 41 #pragma weak ladd = _ladd 42 #pragma weak lsub = _lsub 43 #pragma weak lshiftl = _lshiftl 44 #pragma weak lsign = _lsign 45 #pragma weak lmul = _lmul 46 47 #include "synonyms.h" 48 #include <sys/types.h> 49 #include <sys/dl.h> 50 51 typedef union { 52 long xword; 53 dl_t dl; 54 } dlx_t; 55 56 dl_t 57 ladd(dl_t lop, dl_t rop) 58 { 59 dlx_t r; 60 /* LINTED pointer cast may result in improper alignment */ 61 r.xword = *(long *)&lop + *(long *)&rop; 62 return (r.dl); 63 } 64 65 dl_t 66 lshiftl(dl_t op, int cnt) 67 { 68 dlx_t r; 69 if (cnt < 0) 70 /* LINTED pointer cast may result in improper alignment */ 71 r.xword = (long)(*(ulong_t *)&op >> (-cnt)); 72 else 73 /* LINTED pointer cast may result in improper alignment */ 74 r.xword = *(long *)&op << cnt; 75 return (r.dl); 76 } 77 78 int 79 lsign(dl_t op) 80 { 81 /* LINTED pointer cast may result in improper alignment */ 82 return ((*(long *)&op) >> 63); 83 } 84 85 dl_t 86 lsub(dl_t lop, dl_t rop) 87 { 88 dlx_t r; 89 /* LINTED pointer cast may result in improper alignment */ 90 r.xword = *(long *)&lop - *(long *)&rop; 91 return (r.dl); 92 } 93 94 dl_t 95 lmul(dl_t lop, dl_t rop) 96 { 97 dlx_t r; 98 /* LINTED pointer cast may result in improper alignment */ 99 r.xword = *(long *)&lop * *(long *)&rop; 100 return (r.dl); 101 } 102