dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 462

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

DEC.W
Instruction Fields:
Parallel Moves:
A-118
1.The case where the destination of the data ALU operation is the same register as the destination of the par-
allel read operation is not allowed. Memory writes are allowed in this case.
2.This instruction occupies only 1 program word and executes in 1 cycle for every addressing mode.
Operation
DEC.W
Operation
DEC.W
2
Data ALU Operation
X:(Rn+xxxx)
Operands
X:(SP–xx)
X:xxxxxx
X:(Rn)
X:xxxx
EEE
DSP56800E Core Reference Manual
Operands
Decrement Word
F
C
1
3
4
4
3
4
W
1
1
2
1
2
3
Decrement word.
Decrement word in memory using appropriate address-
ing mode.
X:(Rj)+N
Source
X:(Rj)+
X0
Y1
Y0
A1
B1
C
A
B
Parallel Memory Move
Comments
Freescale Semiconductor
Destination
DEC.W
X:(Rj)+N
X:(Rj)+
X0
Y1
Y0
A1
B1
C
A
B
1