The design of an instruction set for a computer must take into consideration not only machine language constructs but also the requirements imposed on the use of high level programming languages .The translation from high level to machine level programs is done by means of a compiler program.one reason for the trend to provide a complex instruction set is the desire to simplify the compilation and improve the overall computer performance.
The task of a compiler is to generate a sequence of machine instructions for each high level language statement.
The task is simplified if there are machine instructions that implement the statements directly.The essential goal of a cisc architecture is to attempt to provide a single machine instruction for each statement that is written in a high level language.examples of cisc architectures are the digital equipment corporation VAX computer and the IBM 370 computer .
Another characteristic of cisc architecture is the incorporation of variable length instruction formats
The task of a compiler is to generate a sequence of machine instructions for each high level language statement.
The task is simplified if there are machine instructions that implement the statements directly.The essential goal of a cisc architecture is to attempt to provide a single machine instruction for each statement that is written in a high level language.examples of cisc architectures are the digital equipment corporation VAX computer and the IBM 370 computer .
Another characteristic of cisc architecture is the incorporation of variable length instruction formats
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