Motorola DSP96002 - Manual (Page 522)

MOTOROLA DSP96002 USER’S MANUAL B-3
B.1.4 N Real Updates
d(I) = c(I) + a(I) * b(I), I=1,2,...,N
Program ICycles
Words
move #aaddr,r0 1 1
move #baddr,r4 1 1
move #caddr,r1 1 1
move #daddr,r5 1 1
move x:(r0)+,d4.s y:(r4)+,d6.s 1 1
fmpy.s d4,d6,d1 x:(r1)+,d0.s 1 1
do #N,_end 2 3
fadd.s d1,d0 x:(r0)+,d4.s y:(r4)+,d6.s 1 1
fmpy.s d4,d6,d1 x:(r1)+,d0.s d0.s,y:(r5)+ 1 1
_end --- ---
Totals: 10 2N+9
(10 2N+9)
B.1.5 FIR Filter with Data Shift
N-1
c(n) = SUM {a(I) * b(n-I)}
I=0
Program ICycles
Words
move #data,r0 1 1
move #coef,r4 1 1
move #n-1,m0 1 1
fclr d1 m0,m4 1 1
movep x:input,x:(r0) 1 2
fclr d0 x:(r0)-,d4.s y:(r4)+,d6.s 1 1
rep #N 1 2
fmpy d4,d6,d1 fadd.s d1,d0 x:(r0)-,d4.s y:(r4)+,d6.s 1 1
fadd.s d1,d0 (r0)+ 1 1
movep d0.s,x:output 1 2
--- ---
Totals: 10 1N+12
(10 1N+12)