mpyaccu.c revision 1.1.2.2
1 1.1.2.2 jdolecek /* $NetBSD: mpyaccu.c,v 1.1.2.2 2002/06/23 17:37:15 jdolecek Exp $ */ 2 1.1.2.2 jdolecek 3 1.1.2.2 jdolecek /* $OpenBSD: mpyaccu.c,v 1.5 2001/03/29 03:58:19 mickey Exp $ */ 4 1.1.2.2 jdolecek 5 1.1.2.2 jdolecek /* 6 1.1.2.2 jdolecek * Copyright 1996 1995 by Open Software Foundation, Inc. 7 1.1.2.2 jdolecek * All Rights Reserved 8 1.1.2.2 jdolecek * 9 1.1.2.2 jdolecek * Permission to use, copy, modify, and distribute this software and 10 1.1.2.2 jdolecek * its documentation for any purpose and without fee is hereby granted, 11 1.1.2.2 jdolecek * provided that the above copyright notice appears in all copies and 12 1.1.2.2 jdolecek * that both the copyright notice and this permission notice appear in 13 1.1.2.2 jdolecek * supporting documentation. 14 1.1.2.2 jdolecek * 15 1.1.2.2 jdolecek * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 16 1.1.2.2 jdolecek * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 17 1.1.2.2 jdolecek * FOR A PARTICULAR PURPOSE. 18 1.1.2.2 jdolecek * 19 1.1.2.2 jdolecek * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 20 1.1.2.2 jdolecek * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 21 1.1.2.2 jdolecek * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 22 1.1.2.2 jdolecek * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 23 1.1.2.2 jdolecek * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 24 1.1.2.2 jdolecek * 25 1.1.2.2 jdolecek */ 26 1.1.2.2 jdolecek /* 27 1.1.2.2 jdolecek * pmk1.1 28 1.1.2.2 jdolecek */ 29 1.1.2.2 jdolecek /* 30 1.1.2.2 jdolecek * (c) Copyright 1986 HEWLETT-PACKARD COMPANY 31 1.1.2.2 jdolecek * 32 1.1.2.2 jdolecek * To anyone who acknowledges that this file is provided "AS IS" 33 1.1.2.2 jdolecek * without any express or implied warranty: 34 1.1.2.2 jdolecek * permission to use, copy, modify, and distribute this file 35 1.1.2.2 jdolecek * for any purpose is hereby granted without fee, provided that 36 1.1.2.2 jdolecek * the above copyright notice and this notice appears in all 37 1.1.2.2 jdolecek * copies, and that the name of Hewlett-Packard Company not be 38 1.1.2.2 jdolecek * used in advertising or publicity pertaining to distribution 39 1.1.2.2 jdolecek * of the software without specific, written prior permission. 40 1.1.2.2 jdolecek * Hewlett-Packard Company makes no representations about the 41 1.1.2.2 jdolecek * suitability of this software for any purpose. 42 1.1.2.2 jdolecek */ 43 1.1.2.2 jdolecek 44 1.1.2.2 jdolecek 45 1.1.2.2 jdolecek #include "md.h" 46 1.1.2.2 jdolecek 47 1.1.2.2 jdolecek void 48 1.1.2.2 jdolecek mpyaccu(opnd1,opnd2,result) 49 1.1.2.2 jdolecek 50 1.1.2.2 jdolecek unsigned int opnd1, opnd2; 51 1.1.2.2 jdolecek struct mdsfu_register *result; 52 1.1.2.2 jdolecek { 53 1.1.2.2 jdolecek struct mdsfu_register temp; 54 1.1.2.2 jdolecek int carry; 55 1.1.2.2 jdolecek 56 1.1.2.2 jdolecek impyu(&opnd1,&opnd2,&temp); 57 1.1.2.2 jdolecek 58 1.1.2.2 jdolecek /* get result of low word add, and check for carry out */ 59 1.1.2.2 jdolecek if ((result_lo += (unsigned)temp.rslt_lo) < (unsigned)temp.rslt_lo) 60 1.1.2.2 jdolecek carry = 1; 61 1.1.2.2 jdolecek else carry = 0; 62 1.1.2.2 jdolecek 63 1.1.2.2 jdolecek /* get result of high word add, and determine overflow status */ 64 1.1.2.2 jdolecek if ((result_hi += (unsigned)temp.rslt_hi + carry) < 65 1.1.2.2 jdolecek (unsigned)temp.rslt_hi) overflow = TRUE; 66 1.1.2.2 jdolecek 67 1.1.2.2 jdolecek return; 68 1.1.2.2 jdolecek } 69
Indexes created Mon Sep 29 03:10:08 GMT 2025