Stereo System User Manual

B-6 DSP96002 USER’S MANUAL MOTOROLA
B.1.9 Complex Update
dr + jdi = ( cr + jci ) + ( ar + jai )
*
( br + jbi )
dr = cr + ar
*
br - ai
*
bi R0 → a R4 → b R1 → c R → d
di = ci + ar
*
bi + ai
*
br
Program ICycles
Words
move y:(r1),d1.s 1 1
move x:(r0),d5.s y:(r4),d6.s 1 1
fmpy.s d6,d5,d2 x:(r4),d4.s y:(r0),d7.s 1 1
fmpy d4,d7,d2 fadd.s d2,d1 x:(r1),d0.s 1 1
fmpy d4,d5,d2 fadd.s d2,d1 1 1
fmpy d6,d7,d2 fadd.s d2,d0 d1.s,y:(r2) 1 1
fsub.s d2,d0 1 1
move d0.s,x:(r2) 1 1
--- ---
Totals: 8 8
(7 7)
B.1.10 N Complex Updates
dr(I)+jdi(I) = {cr(I)+jci(I)}+{ar(I)+jai(I)}
*
{br(I)+jbi(I)}, I=1,...,N
dr(I) = cr(I) + ar(I)
*
br(I) - ai(I)
*
bi(I)
di(I) = ci(I) + ar(I)
*
bi(I) + ai(I)
*
br(I)
D5 = ar D4 = ai D6 = br D7 = bi
X Memory Organization Y Memory Organization
. .
ci2 di2
cr2 dr2
ci1 di1
R1 → cr1 CADDRR5 → dr1 DADDR
. .
. .
ai2 bi2
ar2 br2
R0 → ai1 bi1
ar1 AADDR R4 → br1 BADDR