#概要
risc-vの命令セット、調べてみた。
#命令セット
| 命令 | 意味 |
|---|---|
| lui rd, imm | rd = imm << 12, pc++ |
| auipc rd, imm | rd = pc + (imm << 12), pc++ |
| jal rd, imm | rd = pc + 1, pc += imm |
| jalr rd, rs1, imm | rd = pc + 1, pc = rs1 + imm |
| beq rs1, rs2, pc + imm | if (rs1 == rs2) then pc += imm else pc++ |
| bne rs1, rs2, pc + imm | if (rs1 != rs2) then pc += imm else pc++ |
| blt rs1, rs2, pc + imm | if (rs1 < rs2) then pc += imm else pc++ |
| bge rs1, rs2, pc + imm | if (rs1 >= rs2) then pc += imm else pc++ |
| bltu rs1, rs2, pc + imm | if (rs1 < rs2) then pc += imm else pc++ |
| bgeu rs1, rs2, pc + imm | if (rs1 >= rs2) then pc += imm else pc++ |
| lb rd, offset(rs1) | rd = mem[rs1 + offset], pc++ |
| lh rd, offset(rs1) | rd = mem[rs1 + offset], pc++ |
| lw rd, offset(rs1) | rd = mem[rs1 + offset], pc++ |
| lbu rd, offset(rs1) | rd = mem[rs1 + offset], pc++ |
| lhu rd, offset(rs1) | rd = mem[rs1 + offset] |
| sb rs2, offset(rs1) | mem[rs1 + offset] = rs2, pc++ |
| sh rs2, offset(rs1) | mem[rs1 + offset] = rs2, pc++ |
| sw rs2, offset(rs1) | mem[rs1 + offset] = rs2, pc++ |
| addi rd, rs1, imm | rd = rs1 + imm, pc++ |
| slti rd, rs1, imm | rd = (rs1 < imm) ? 1 : 0, pc++ |
| sltiu rd, rs1, imm | rd = (rs1 < imm) ? 1 : 0, pc++ |
| xori rd, rs1, imm | rd = rs1 ^ imm, pc++ |
| ori rd, rs1, imm | rd = rs1 ｜imm, pc++ |
| andi rd, rs1, imm | rd = rs1 & imm, pc++ |
| slli rd, rs1, imm | rd = rs1 << imm, pc++ |
| srli rd, rs1, imm | rd = rs1 >> imm, pc++ |
| srai rd, rs1, imm | rd = rs1 >>> imm, pc++ |
| add rd, rs1, rs2 | rd = rs1 + rs2, pc++ |
| sub rd, rs1, rs2 | rd = rs1 - rs2, pc++ |
| sll rd, rs1, rs2 | rd = rs1 << rs2, pc++ |
| slt rd, rs1, rs2 | rd = (rs1 < rs2) ? 1 : 0, pc++ |
| sltu rd, rs1, rs2 | rd = (rs1 < rs2) ? 1 : 0, pc++ |
| xor rd, rs1, rs2 | rd = rs1 ^ rs2, pc++ |
| srl rd, rs1, rs2 | rd = rs1 >> rs2, pc++ |
| sra rd, rs1, rs2 | rd = rs1 >>> rs2, pc++ |
| or rd, rs1, rs2 | rd = rs1 ｜rs2, pc++ |
| and rd, rs1, rs2 | rd = rs1 & rs2, pc++ |
以上。