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Instruction Memory
Control Unit
Processing Unit
Data Memory
Instruction Stream
Data Stream
(
a
) SISD
Processing Unit
Data Memory
Instruction Memory
Control Unit
Processing Unit
Data Memory
Instruction Stream
Processing Unit
Data Memory
Data Stream
(
b
) SIMD
Instruction Memory
Control Unit
Instruction Stream
Instruction Memory
Control Unit
Processing Unit
Data Memory
Instruction Stream
Data Stream
Instruction Memory
Control Unit
Instruction Stream
(
c
) MISD
Instruction Memory
Control Unit
Processing Unit
Data Memory
Instruction Stream
Data Stream
Instruction Memory
Control Unit
Processing Unit
Data Memory
Instruction Stream
Data Stream
Instruction Memory
Control Unit
Processing Unit
Data Memory
Instruction Stream
Data Stream
(
d
) MIMD
Figure 11.3 The four architecture classes resulting from Flynn's taxonomy. (a) SISD,
(b) SIMD, (c) MISD, (d) MIMD
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