| opcode | 5 | 5 | 5 | 11 | ||
| CPU指令集 | ||||||
| 算术运算指令 | ||||||
| 整数运算指令(7) | ||||||
| 000000 | rs | rt | rd | 保留 | add rs,rt,rd | |
| 000001 | rs | rt | imm | addi,rs,rt,imm | ||
| 000010 | rs | rt | rd | 保留 | sub rs,rt,rd | |
| 000011 | rs | rt | imm | subi,rs,rt,imm | ||
| 000100 | rs | rt | rd | 保留 | mul rs,rt,rd | |
| 000101 | rs | rt | rd | 保留 | div rs,rt,rd | |
| 000110 | rs | rt | rd | 保留 | mod rs,rt,rd | |
| 浮点数运算指令(4) | ||||||
| 000111 | rs | rt | rd | 保留 | fadd rs,rt,rd | |
| 001000 | rs | rt | rd | 保留 | fsub rs,rt,rd | |
| 001001 | rs | rt | rd | 保留 | fmul rs,rt,rd | |
| 001010 | rs | rt | rd | 保留 | fdiv rs,rt,rd | |
| 逻辑运算指令(9) | ||||||
| 001011 | rs | rt | rd | 保留 | and rs,rt,rd | |
| 001100 | rs | rt | rd | 保留 | or rs,rt,rd | |
| 001101 | rs | rt | 保留 | 保留 | not rs,rt | |
| 001110 | rs | rt | rd | 保留 | xor rs,rt,rd | |
| 001111 | rs | rt | imm | andi rs,rt,imm | ||
| 010000 | rs | rt | imm | ori rs,rt,imm | ||
| 010001 | rs | rt | imm | xori rs,rt,imm | ||
| 010010 | rs | rt | shamt | sll rs,rd,shamt | ||
| 010011 | rs | rt | shamt | slr rs,rd,shamt | ||
| 比较转移指令(7) | ||||||
| 010100 | rs | rt | lable | less rs,rt,lable | ||
| 010101 | rs | rt | lable | great rs,rt,lable | ||
| 010110 | rs | rt | lable | lessu rs,rt,lable | ||
| 010111 | rs | rt | lable | greatu rs,rt,lable | ||
| 011000 | rs | rt | lable | equal rs,rt,lable | ||
| 011001 | rs | rt | lable | uequal rs,rt,lable | ||
| 011010 | rs | 保留 | jmp rs | |||
| 数据传输指令(10) | ||||||
| 011011 | rs | rt | mov rs,rt | |||
| 011100 | rs | rt | rd | 保留 | lword rs,rt,rd | |
| 011101 | rs | rt | rd | 保留 | sword rs,rt,rd | |
| 011110 | rs | rt | rd | 保留 | lhalf rs,rt,rd | |
| 011111 | rs | rt | rd | 保留 | shalf rs,rt,rd | |
| 100000 | rs | rt | rd | 保留 | lbyte rs,rt,rd | |
| 100001 | rs | rt | rd | 保留 | sbyte rs,rt,rd | |
| 100010 | rs | 保留 | imm | lui rs,imm | ||
| 100011 | f1 | rt | rd | 保留 | ldouble $f1,$r2,$r3 | |
| 100100 | f1 | rt | rd | 保留 | sdouble $f1,$r2,$r3 | |
| 系统指令(5) | ||||||
| 100101 | rs | 保留 | call rs | |||
| 100110 | 保留 | ret | ||||
| 100111 | rs | 保留 | push rs | |||
| 101000 | rs | 保留 | pop rs | |||
| 101001 | 保留 | halt | ||||
| 101010 | imm | int imm | ||||
| 101011 | 保留 | IRET | ||||
| 101100 | SWITCH | |||||
| 伪指令 | ||||||
| load rs,imm | ||||||