#define	BDNZ	BC	16,0,#define	BDNE	BC	0,2, /* *	mpvecadd(mpdigit *a, int alen, mpdigit *b, int blen, mpdigit *sum) * *		sum[0:alen] = a[0:alen-1] + b[0:blen-1] * *	prereq: alen >= blen, sum has room for alen+1 digits * *		R3 == a	(first arg passed in R3) *		R4 == alen *		R5 == b *		R6 == blen *		R7 == sum *		R8 == temporary *		R9 == temporary */TEXT	mpvecadd(SB),$-4 	MOVW	alen+4(FP), R4	MOVW	b+8(FP), R5	MOVW	blen+12(FP), R6	MOVW	sum+16(FP), R7	SUB	R6, R4		/* calculate counter for second loop (alen > blen) */	SUB	$4, R3		/* pre decrement for MOVWU's */	SUB	$4, R5		/* pre decrement for MOVWU's */	SUB	$4, R7		/* pre decrement for MOVWU's */	MOVW	R0, XER		/* zero carry going in */ 	/* if blen == 0, don't need to add it in */	CMP	R0, R6	BEQ	_add1 	/* sum[0:blen-1],carry = a[0:blen-1] + b[0:blen-1] */	MOVW	R6, CTR_addloop1:	MOVWU	4(R3), R8	MOVWU	4(R5), R9	ADDE	R8, R9	MOVWU	R9, 4(R7)	BDNZ	_addloop1 _add1:	/* if alen == blen, we're done */	CMP	R0, R4	BEQ	_addend 	/* sum[blen:alen-1],carry = a[blen:alen-1] + 0 + carry */	MOVW	R4, CTR_addloop2:	MOVWU	4(R3), R8	ADDE	R0, R8	MOVWU	R8, 4(R7)	BDNZ	_addloop2 	/* sum[alen] = carry */_addend:	ADDE	R0, R0, R8	MOVW	R8, 4(R7)	RETURN