[unix-history] / usr / src / sys / tahoe / align / Alnd.c

/*-
 * Copyright (c) 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Computer Consoles Inc.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)Alnd.c	7.1 (Berkeley) %G%
 */

#include "align.h"
lnd(infop)	process_info *infop;
/*
/*	Load a negated double operand into accumulator.
/*
/*******************************************************/
{
	register struct oprnd *oprnd_pnt;

	oprnd_pnt = operand(infop,0);
	if ( reserved( oprnd_pnt->data ) ) 
		exception(infop, ILL_OPRND);
	if ( oprnd_pnt->data == 0 ) acc_high = 0;
	else acc_high = 0x80000000 ^ oprnd_pnt->data ;
	acc_low = oprnd_pnt->data2 ;
	psl |= PSL_DBL;
	infop->acc_dbl = 1;
}
Commit	Line	Data
7c27088c KB	1	/*-
	2	* Copyright (c) 1986 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Computer Consoles Inc.
	7	*
	8	* %sccs.include.redist.c%
	9	*
	10	* @(#)Alnd.c 7.1 (Berkeley) %G%
	11	*/
578defd0	12
6499767c	13	#include "align.h"
578defd0 SL	14	lnd(infop) process_info *infop;
	15	/*
	16	/* Load a negated double operand into accumulator.
	17	/*
	18	/*******************************************************/
	19	{
	20	register struct oprnd *oprnd_pnt;
	21
	22	oprnd_pnt = operand(infop,0);
	23	if ( reserved( oprnd_pnt->data ) )
	24	exception(infop, ILL_OPRND);
	25	if ( oprnd_pnt->data == 0 ) acc_high = 0;
	26	else acc_high = 0x80000000 ^ oprnd_pnt->data ;
	27	acc_low = oprnd_pnt->data2 ;
	28	psl \|= PSL_DBL;
	29	infop->acc_dbl = 1;
	30	}