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Instruction Classification
4-43
Assembly Language Instructions
Table 4–35. Class 9a Instruction Encoding
Bit 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Class 9a 1 1 1 0 1 0 0 A
n
C9a 0 R
x
1 1
Class 9b 1 1 1 1 1 1 0 C9a
imm8
Class 9c 1 1 1 1 1 0 1 AP
n
0 C9c x
imm5
Class 9d 1 1 1 1 1 1 1 1 0 C9d 0 0 0 0
ENDLOOP
n
1 1 1 1 1 1 1 1 0 0 0 0 1 0 0 0 n
NOP 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Table 4–36. Class 9a Instruction Description
C9a Mnemonic Description
0 0 FIRK A
n
, *R
x
Finite impulse response tap execution. When used with repeat counter will execute a
16 bit ×16 bit multiplication between an indirect-addressed data memory buffer and
program memory (coefficients). 32 bit accumulation. Circular buffering. Each tap
executes in 2 cycles. R
x
automatically increments by 2 per tap.
0 1 FIR A
n
, *R
x
Finite impulse response tap execution. When used with the repeat counter, it will
execute a 16 bit ×16 bit multiplication between two indirect-addressed data memory
buffers into a 32 bit accumulator. Circular buffer operation. Executes in 2 instruction
cycles. R
x
and R(
x
+1) automatically increments by 2 per tap.
1 0 CORK A
n
, *R
x
Correlation function. When used with repeat will execute 16×16 multiplication
between data memory and program memory, 48 bit accumulation, and a circular
buffer operation. Each tap takes 3 instruction cycles. R
x
automatically increments by
2 per tap.
1 1 COR A
n
, *R
x
Correlation function. When used with repeat will execute 16×16 multiplication
between two indirectly addressed data memory buffers, 48 bit accumulation, and a
circular buffer operation. Each tap takes 3 instruction cycles. R
x
and R(
x
+1)
automatically increments by 2 per tap.
Table 4–37. Class 9b Instruction Description
C9b Mnemonic Description
0 0 RPT
imm8
Load the repeat counter with an 8 bit constant and execute the instruction that
follows
imm8
+2 times. Interrupts are queued during execution.
0 1 MOV STR,
imm8
Load the STR register with an 8 bit constant.
1 0 MOV SV,
imm4
Load the SV (shift value) register with a 4 bit constant.