MIPS instruction Subset

THE MIPS INSTRUCTION SUBSET

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Below you find the MIPS instruction subset which is implemented by the pipeline components. The subset includes all instructions of the main group and all instructions with opcode "00".

The formats of the instructions are mainly the same as described in the book of Hennessy & Patterson ("Computer Organizition and Design", appendix A.10). The particular variations of the formats are specified here.

Arithmetic and Logical Instructions
add - Addition (with overflow) addu - Addition (without overflow) addi - Addition immediate (with overflow) addiu - Addition immediate (without overflow) and - AND andi - AND immediate div - Divide (with overflow) divu - Divide (without overflow) mult - Multiply multu - Unsigned multiply nor - NOR	or - OR ori - OR immediate sll - Shift left logical sra - Shift right arithmetic srav - Shift right arithmetic variable srl - Shift right logical srlv - Shift right logical variable sub - Subtract (with overflow) subu - Subtract (without overflow) xor - Exclusive OR xori - XOR immediate

Variations of format

mult rd, rs, rt

0	rs	rt	rd	0	0x18
6	5	5	5	5	6

div rd, rs, rt

0	rs	rt	rd	0	0x1a
6	5	5	5	5	6

Comparison Instructions slt - Set less than sltu - Set less than unsigned slti - Set less than immediate sltiu - Set less than unsigned immediate	Branch Instructions (only "pipeline3" component) beq - Branch on equal bgtz - Branch on greater than zero blez - Branch on less than equal zero bne - Branch on not equal
Store Instructions sb - Store byte sh - Store halfword sw - Store word swcz - Store word coprocessor z(0-3) swl - Store word left swr - Store word right	Data Movement Instructions mfhi - Move from hi mflo - Move from lo mthi - Move to hi mtlo - Move to lo
Constant-Manipulating Instructions lui - Load upper immediate	Exception and Interrupt Instructions syscall - System call break - Break
Jump Instructions (only "pipeline4" component) j - Jump jal - Jump and link jalr - Jump and link register jr - Jump register	Load Instructions lb - Load byte lbu - Load unsigned byte lh - Load halfword lhu - Load unsigned halfword lw - Load word lwcz - Load word coprocessor z(0-3) lwl - Load word left lwr - Load word right