[unix-history] / usr / src / sys / tahoealign / Aadwc.c

/*	Aadwc.c	1.1	86/07/20	*/

#include "../tahoealign/align.h" 
adwc(infop)	process_info *infop;
/*
/*	Add with carry.
/*	Note : the play with 'tmp' just before the 'asm' line makes
/*		sure that when the adwc opcode is executed, the current
/*		carry in psl is the same as the 'offending' process'.
/*		Don't change unless you know exactly what you're doing.
/*
/*****************************/
{
	register	long	Register_12;	/* Has to be first reg ! */
	register	long	Register_11;
	register	long	Register_10;
	register 	long	tmp;

	Register_12 = operand(infop,0)->data;
	Register_11 = operand(infop,1)->data;
	if (carry)	/* If process' carry set */
		tmp = -1;
	else tmp = 0;
	tmp++;		/* 0 => carry set.  1 => carry clear */

	Register_10=psl;
	Set_psl(r10);	/* restore the user psl */
	asm("	adwc	r11,r12");
	asm("	movpsl	r11");
	New_cc (Register_11);

	write_back(infop, Register_12, operand(infop,1) );
}
Commit	Line	Data
c8cccbb7 C	1	/* Aadwc.c 1.1 86/07/20 */
	2
	3	#include "../tahoealign/align.h"
	4	adwc(infop) process_info *infop;
	5	/*
	6	/* Add with carry.
	7	/* Note : the play with 'tmp' just before the 'asm' line makes
	8	/* sure that when the adwc opcode is executed, the current
	9	/* carry in psl is the same as the 'offending' process'.
	10	/* Don't change unless you know exactly what you're doing.
	11	/*
	12	/*****************************/
	13	{
	14	register long Register_12; /* Has to be first reg ! */
	15	register long Register_11;
	16	register long Register_10;
	17	register long tmp;
	18
	19	Register_12 = operand(infop,0)->data;
	20	Register_11 = operand(infop,1)->data;
	21	if (carry) /* If process' carry set */
	22	tmp = -1;
	23	else tmp = 0;
	24	tmp++; /* 0 => carry set. 1 => carry clear */
	25
	26	Register_10=psl;
	27	Set_psl(r10); /* restore the user psl */
	28	asm(" adwc r11,r12");
	29	asm(" movpsl r11");
	30	New_cc (Register_11);
	31
	32	write_back(infop, Register_12, operand(infop,1) );
	33	}