70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/* $NetBSD: mpyaccs.c,v 1.1 2002/06/05 01:04:26 fredette Exp $ */
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/* $OpenBSD: mpyaccs.c,v 1.4 2001/03/29 03:58:18 mickey Exp $ */
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/*
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* Copyright 1996 1995 by Open Software Foundation, Inc.
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* All Rights Reserved
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies and
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* that both the copyright notice and this permission notice appear in
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* supporting documentation.
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*
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* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
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* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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/*
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* pmk1.1
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*/
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/*
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* (c) Copyright 1986 HEWLETT-PACKARD COMPANY
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*
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* To anyone who acknowledges that this file is provided "AS IS"
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* without any express or implied warranty:
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* permission to use, copy, modify, and distribute this file
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* for any purpose is hereby granted without fee, provided that
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* the above copyright notice and this notice appears in all
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* copies, and that the name of Hewlett-Packard Company not be
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* used in advertising or publicity pertaining to distribution
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* of the software without specific, written prior permission.
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* Hewlett-Packard Company makes no representations about the
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* suitability of this software for any purpose.
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*/
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#include "md.h"
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void
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mpyaccs(opnd1,opnd2,result)
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int opnd1, opnd2;
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struct mdsfu_register *result;
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{
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struct mdsfu_register temp;
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int carry, sign;
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impys(&opnd1,&opnd2,&temp);
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/* get result of low word add, and check for carry out */
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if ((result_lo += (unsigned)temp.rslt_lo) < (unsigned)temp.rslt_lo)
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carry = 1;
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else carry = 0;
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/* get result of high word add, and determine overflow status */
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sign = result_hi ^ temp.rslt_hi;
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result_hi += temp.rslt_hi + carry;
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if (sign >= 0 && (temp.rslt_hi ^ result_hi) < 0) overflow = TRUE;
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return;
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}
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