dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 612

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

B - 8
;
;
;
;*********************************************************************************************************************
;
;
;****************************************
n
start
wddr
cddr
input
output
;
;
;
;**********************************************************************************************************************
;*********************************************************************************************************************
end
initialization
equ
equ
equ
equ
equ
equ
org
move
move
move
move
opt
filter loop :8+(n-1) cycles
movep
clr
rep
mac
macr
movep
Figure B-1 20-Tap FIR Filter Example (Sheet 2 of 2)
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20
$40
$0
$0
$ffe0
$ffe1
p:start
#wddr,r0
#cddr,r4
#n-1,m0
m0,m4
cc
y:input,x: (r0)
a
#n-1
x0,y0,a
x0,x0,a
a,y:output
BENCHMARK PROGRAMS
BENCHMARK PROGRAMS
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x:(r0)+,x0
x:(r0)+,x0
(r0)-
;r0
;set modulo arithmetic
;for the 2 circular buffers
;input sample in memory
y: (r4)+,y0
y:(r4)+,y0
;output filtered sample
;r1
samples
coefficients
MOTOROLA