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How does an assembler translate an assembly-language program?
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An assembler is a specialized computer program that automatically converts instructions written in assembly language into machine language.21
Because assembly language is a low-level programming language designed to be a symbolic equivalent of a specific computer's machine code, the translation process is relatively direct. The assembler performs the following functions:21
- Mnemonic Conversion: It replaces short mnemonic codes (such as "add") with the corresponding numeric binary codes that the computer can execute directly.2
- Symbolic Resolution: It maps names assigned to blocks of memory or data to their actual machine addresses within the computer architecture.2
- Instruction Expansion: Some assemblers can simplify programming by converting a single symbolic entity into a sequence of multiple machine-level instructions.1
Since machine language varies by manufacturer, each specific architecture requires its own dedicated assembler to interpret its unique instruction set.21