INSTRUCTION DESCRIPTIONS

DEC

Decrement by One

Instruction Format:

DEC D

Opcode:

DEC

 

23

 

 

 

 

 

 

16

15

 

 

 

 

 

 

8

7

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

 

0

0

0

0

1

0

1

d

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Instruction Fields:

D d

A0

B1

Timing: 2 oscillator clock cycles

Memory: 1 program word

MOTOROLA

INSTRUCTION SET DETAILS

A - 81

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Motorola DSP56000, 24-Bit Digital Signal Processor manual Instruction Fields