A.3 -Instruction Notation Conventions

A CPU Instruction Set Details

A.3 Instruction Notation Conventions

In this appendix, all variable subfields in an instruction format (such as rs, rt, immediate, etc.) are shown in lowercase names.

For the sake of clarity, we sometimes use an alias for a variable subfield in the formats of specific instructions. For example, we use rs = base in the format for load and store instructions. Such an alias is always lower case, since it refers to a variable subfield.

Figures with the actual bit encoding for all the mnemonics are located at the end of this Appendix, and the bit encoding also accompanies each instruction.

In the instruction descriptions that follow, the Operation section describes the operation performed by each instruction using a high-level language notation. The R4000 can operate as either a 32- or 64-bit microprocessor and the operation for both modes is included with the instruction description.

Special symbols used in the notation are described in Table A-1.

Table A-1 CPU Instruction Operation Notations

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