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MIPS Instructions. Note: You can have this handout on both exams. Instruction Formats: Instruction formats: all 32 bits wide (one word):. 6. 5. 5. 5. 5. 6. MIPS instruction format sometimes called encoding formats are discussed with details along tables of I,J,R,FR,FI formats. See details in the guide. MIPS Instruction Code Formats. On some processors, particularly CISC processors, the size of an instruction code varies with the instruction and its operands. MIPS Instruction formats. R-type format. 6. 5 5 5. 5. 6 src src dst. Used by add, sub etc. I-type format. 6. 5 5. 16 base dst offset. Used by lw (load word), sw (store There are 3 main instruction formats in MIPS. The fields in each type are laid out in such a way that the same fields are always in the same place for each type. R Instructions[edit]. R instructions are used when all the data values used by the instruction are located in registers. All R-type instructions have the following Encoding MIPS Instructions. Figure A.10.2 explains how a MIPS instruction is encoded in a binary number. Each column contains instruction encodings for aThe MIPS instruction set illustrates four underlying principles of hardware design: instructions the same length, thereby requiring different instruction formats. MIPS Instruction Formats. All MIPS instructions are encoded in binary. All MIPS instructions are 32 bits long. (Note: some assembly langs do not have uniform length for all instructions) There are three instruction categories: R-format (most common), I-format, and J-format. All instructions have: