Instruction Set Architecture: Difference between revisions

Revision as of 17:38, 12 August 2005

Revision as of 02:50, 20 August 2005

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{{merge|Instruction set}}

In [[Computer architecture]], an '''Instruction Set Architecture''' defines how [[instruction]]s are interpreted by a [[processor]]. The term "architecture" refers to the logical structure of the system that must be implemented in order for the instruction set to perform [[computation]]. This logical structure usually comprises the memory, registers and their interactions with a [[central processing unit]].

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RISC instruction sets are also known as load-store architectures, and represent the minimal set of instructions on which a stack of software can be built. They load and store words in memory locations, perform the arithmetical operations of addition, subtraction, multiplication and division on floating point numbers as well as integers. They perform the logical operations of AND, NOT, OR and others on data, and have the ability to make decisions based on the results of logical or arithmetical calculations. These decisions usually result in some form of branching. MIPS is a well known RISC instruction set.

In MIPS out-of-order execution is possible.

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