Lec02c - COMP 4300 Computer Architecture Instruction Set Dr...

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1 COMP 4300 Computer Architecture Instruction Set Dr. Xiao Qin Auburn University http://www.eng.auburn.edu/~xqin [email protected] Fall, 2010
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2 The Instruction Set (ISA): a Critical Interface instruction set software hardware The actual  programmer  visible instruction set
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3 Interface Design Lasts through many implementations (portability, compatability) Is used in many different ways (generality) Provides convenient functionality to higher levels Permits an efficient implementation at lower levels Interface imp 1 imp 2 imp 3 use use use time
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4 Execution Cycle Instruction Fetch Instruction Decode Operand Fetch Execute Result Store Next Instruction Obtain instruction from program storage Determine required actions and instruction size Locate and obtain operand data Compute result value or status Deposit results in storage for later use Determine successor instruction = really important point
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5 Instruction Set Design Issues Where are operands stored? registers, memory, stack, accumulator
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This note was uploaded on 12/07/2011 for the course COMP 3400 taught by Professor Staff during the Fall '10 term at Auburn University.

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Lec02c - COMP 4300 Computer Architecture Instruction Set Dr...

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