.pg
.x addq
.x addq3
.lt
------------------------------------------------------------------------
ADDQ	add,sum
ADDQ3	add1,add2,sum
------------------------------------------------------------------------
.el
.b 3
These macros perform quadword addition.
.b
These macros will produce inline code to perform the quadword addition.
After the addition is performed, r0 will contain the following values:
.b
.lt
	-1	if sum < 0
	0	if sum = 0
	1	if sum > 0
.el
.b
The ADDQ macro is equivalent to the expression:
.b
.lt
	sum = add + sum
.el
.b
and the ADDQ3 macro is equivalent to the expression:
.b
.lt
	sum = add1 + add2
.el
.b
For example:
.b
.lt
	addq3	add1,add2,sum
.el
.b
will generate the following code:
.b
.lt
		movq	add2,sum
		addl	add1,sum
		adwc	4+add1,4+sum
		tstl	4+sum
		blss	30001$
		bgtr	30002$
		tstl	sum
		bnequ	30002$
		clrl	r0
		brb	30003$
	30001$:	movl	#-1,r0
		brb	30003$
	30002$:	movl	#1,r0
	30003$:
.el
.b
See also CMPQ, DIVQ4, MULQ, MULQ3, SUBQ, SUBQ3 and TSTQ.