[unix-history] / usr / src / sys / tahoe / align / Acvtlb.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%
 *
 *	@(#)Acvtlb.c	7.1 (Berkeley) %G%
 */

#include "align.h"
cvtlb(infop) 	process_info *infop;
/*
/*	Convert long to byte, checks overflow
/*
/****************************************/
{
	register long result;

	result = operand(infop,0)->data;
	if (result < 0 )  negative_1 ; else negative_0;
	if (result == 0 )  zero_1 ; else zero_0;
	carry_1; 
	if (result > 0x7f || result <= -0x80) overflow_1;
	else overflow_0;
	write_back (infop, result, operand(infop,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	* @(#)Acvtlb.c 7.1 (Berkeley) %G%
	11	*/
bdf4b0cd	12
6499767c	13	#include "align.h"
bdf4b0cd SL	14	cvtlb(infop) process_info *infop;
	15	/*
	16	/* Convert long to byte, checks overflow
	17	/*
	18	/****************************************/
	19	{
	20	register long result;
	21
	22	result = operand(infop,0)->data;
	23	if (result < 0 ) negative_1 ; else negative_0;
	24	if (result == 0 ) zero_1 ; else zero_0;
	25	carry_1;
	26	if (result > 0x7f \|\| result <= -0x80) overflow_1;
	27	else overflow_0;
	28	write_back (infop, result, operand(infop,1) );
	29	}