Orthogonal Instruction Set

In computer engineering, an orthogonal instruction set is an instruction set architecture where all instruction types can use all addressing modes. It is 'orthogonal' in the sense that the instruction type and the addressing mode vary independently. An orthogonal instruction set does not impose a limitation that requires a certain instruction to use a specific register.

Read more about Orthogonal Instruction Set:  Orthogonality in Practice

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