xref: /original-bsd/sys/tahoe/align/Amull3.c (revision b65ab6e5)
1*b65ab6e5Sbostic /*-
2*b65ab6e5Sbostic  * Copyright (c) 1986 The Regents of the University of California.
3*b65ab6e5Sbostic  * All rights reserved.
4*b65ab6e5Sbostic  *
5*b65ab6e5Sbostic  * This code is derived from software contributed to Berkeley by
6*b65ab6e5Sbostic  * Computer Consoles Inc.
7*b65ab6e5Sbostic  *
8*b65ab6e5Sbostic  * %sccs.include.redist.c%
9*b65ab6e5Sbostic  *
10*b65ab6e5Sbostic  *	@(#)Amull3.c	7.1 (Berkeley) 12/06/90
11*b65ab6e5Sbostic  */
1286266f2bSsam 
13f5878f6dSbostic #include "align.h"
mull3(infop)1486266f2bSsam mull3(infop)	process_info *infop;
1586266f2bSsam /*
1686266f2bSsam /*	Multiply longwords, 3 operands.
1786266f2bSsam /*
1886266f2bSsam /*****************************************/
1986266f2bSsam {
2086266f2bSsam 	register	long	Register_12;	/* Has to be first reg ! */
2186266f2bSsam 	register	long	result, data0, data1;
2286266f2bSsam 
2386266f2bSsam 	data0 = operand(infop,0)->data;
2486266f2bSsam 	data1 = operand(infop,1)->data;
2586266f2bSsam 	Register_12=psl;
2686266f2bSsam 	Set_psl(r12);	/* restore the user psl */
2786266f2bSsam 	result = data0 * data1;
2886266f2bSsam 	asm ("	movpsl	r12");
2986266f2bSsam 	New_cc (Register_12);
3086266f2bSsam 	write_back (infop,result, operand(infop,2) );
3186266f2bSsam }
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