xref: /csrg-svn/sys/tahoe/align/Adec.c (revision 45699)
1*45699Sbostic /*	Adec.c	1.2	90/12/04	*/
229603Ssam 
3*45699Sbostic #include "align.h"
429603Ssam dec(infop)	process_info *infop;
529603Ssam /*
629603Ssam /*	Decrement operand.
729603Ssam /*
829603Ssam /***************************************/
929603Ssam {
1029603Ssam 	register	long	Register_12;	/* Has to be first reg ! */
1129603Ssam 	register	long	Register_11;
1229603Ssam 
1329603Ssam 	Register_11 = operand(infop,0)->data;
1429603Ssam 	Register_12=psl;
1529603Ssam 	Set_psl(r12);	/* restore the user psl */
1629603Ssam 	asm ("	decl	r11");			/* Make sure to use the
1729603Ssam 						 * right opcode */
1829603Ssam 	asm ("	movpsl	r12");
1929603Ssam 	New_cc (Register_12);
2029603Ssam 
2129603Ssam 	write_back (infop,Register_11, operand(infop,0) );
2229603Ssam }
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