Block FIR Filter using "Zipping"

Dot Product

Dot Product

one output

one output

two outputs

Two dot products,

without re-fetching data

LD R0,X0

LD R1,C0

R2 = R0*R1, LD R0,X(-1)

LD R1,C1

R2 = R2+R0*R1, LD R0,X(-2)

LD R1,C2

R2 = R2+R0*R1, LD R0,X(-3)

LD R1,C3

R2 = R2+R0*R1

;y0 in R2

LD R0,X1

LD R1,C0

R2 = R0*R1, LD R0,X0

R3 = R0*R1, LD R1,C1

R2 = R2+R0*R1, LD R0,X(-1)

R3 = R3+R0*R1, LD R1,C2

R2 = R2+R0*R1, LD R0,X(-2)

R3 = R3+R0*R1, LD R1,C3

R2 = R2+R0*R1, LD R0,X(-3)

R3 = R3+R0*R1

; y1 in R2, y0 in R3

Previous slide

Next slide

Back to first slide

View graphic version