![]() The addressing mode part of the machine instruction format allows to specify whether the OPERAND value is a direct data Or It is an indirect referencing. ![]() The addressing mode for the machine instruction specifies the rules for the CPU while operating on the OPERAND. ![]() The first part indicates the addressing mode, the second part OPCODE specifies the operation to be performed and the third part OPERAND either data or address of the data. Computer Organization and Design MIPS Edition: The Hardware/Software Interface (The Morgan Kaufmann Series in Computer Architecture and Design) David A. In microprocessor architecture, the instruction format is a standard machine instruction format that CPU can decode and execute.ĭepending upon the instruction type, the pattern of bits in the machine instruction format consist of three parts. It provides the information about the operand whether it contains either the data or address of the data. The addressing mode is represented by a single bit in the instruction format. In simple words, the addressing mode is the field ( single bit ) in the instruction format that directs the processor regarding how to locate the data that is to be operated by the CPU.
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