dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 596

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

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A.10.4 Parallel Instruction Encoding of the Operation Code
The operation code encoding for the instructions which allow parallel moves is divided
into the multiply and nonmultiply instruction encodings shown in the following subsection.
Multiply Instruction Encoding
The 8-bit operation code for multiply instructions allowing parallel moves has different
fields than the nonmultiply instruction’s operation code.
The 8-bit operation code=1QQQ dkkk where QQQ=selects the inputs to the multiplier
A - 330
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Table A-26 Operation Code K0-2 Decode
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Code
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1
Freescale Semiconductor, Inc.
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For More Information On This Product,
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INSTRUCTION SET DETAILS
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16 15
16 15
16 15
INSTRUCTION ENCODING
negative
positive
Go to: www.freescale.com
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0
0
k2
0
0
0
0
0
0
kkk = three unencoded bits k2, k1, k0
d = destination accumulator
d = 0
d = 1
0
0
0
mpy and acc
mpy only
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k1
0
0
0
A
B
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0
8 7
8 7
8 7
don’t round
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round
k0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
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MOTOROLA
1
0
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