xref: /csrg-svn/sys/tahoe/align/Aadd3.c (revision 45760)
1*45760Sbostic /*-
2*45760Sbostic  * Copyright (c) 1986 The Regents of the University of California.
3*45760Sbostic  * All rights reserved.
4*45760Sbostic  *
5*45760Sbostic  * This code is derived from software contributed to Berkeley by
6*45760Sbostic  * Computer Consoles Inc.
7*45760Sbostic  *
8*45760Sbostic  * %sccs.include.redist.c%
9*45760Sbostic  *
10*45760Sbostic  *	@(#)Aadd3.c	7.1 (Berkeley) 12/06/90
11*45760Sbostic  */
1229584Ssam 
1345699Sbostic #include "align.h"
add3(infop)1429584Ssam add3(infop)	process_info *infop;
1529584Ssam /*
1629584Ssam /*	Add , 3 operands.
1729584Ssam /*
1829584Ssam /*****************************************/
1929584Ssam {
2029584Ssam 
2129584Ssam 	register	long	Register_12;	/* Has to be first reg ! */
2229584Ssam 	register 	long	data0, data1, result;
2329584Ssam 
2429584Ssam 	data0 = operand(infop,0)->data;
2529584Ssam 	data1 = operand(infop,1)->data;
2629584Ssam 	Register_12=psl;
2729584Ssam 	Set_psl(r12);	/* restore the user psl */
2829584Ssam 	result = data0 + data1;		/* 32 bits of true result */
2929584Ssam 	asm ("	movpsl	r12");
3029584Ssam 	New_cc (Register_12);
3129584Ssam 	write_back (infop,result, operand(infop,2) );
3229584Ssam }
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