FIR Filter on 'C62xx

LOOP:

LDW .D2 *B4++,B2 ; load coef(0) & coef(1)

|| LDW .D1 *A7--,A2 ; load state(0) & state(1)

NOP 4 ; wait for loads to finish

MPYHL .M1X A2,B2,A3 ; P0(i)=coef(2i)*state(2i)

|| MPYLH .M2X A2,B2,B7 ; P1(i) =coef(2i+1)*state(2i+1)

|| ADD .S2 -1,B0,B0 ; Dec loop counter

NOP 1 ; wait for multiplies to finish

ADD .L1 A0,A3,A0 ; Sum0(i) += P0(i-2)

|| ADD .L2 B1,B7,B1 ; Sum1(i) += P1(i-2)

||[B0] B .S1 LOOP ; Cond. Branch to LOOP

NOP 5 ; wait for branch to take effect

; Loop ends here

No SW Pipelining:

6.5 Cycles/Tap

11 instructions