Question

Provide the instruction type, assembly language instruction, and binary representation of instruction described by the following RISC-V fields: opcode=0x33, funct3=0x0, funct7=0x20, rs2=5, rs1=7, rd=6

Answer 1

Answer:

Explanation:

Its a R-type instruction:

 31        25 24     20 19     15 14  12 11      7 6           0

+------------+---------+---------+------+---------+-------------+

| funct7     | rs2     | rs1     |funct3| rd      | opcode      |

+------------+---------+---------+------+---------+-------------+

Assembly Language Instruction:

sub rd, rs1, rs2    || 0x0 0x20   || R[rd] ← R[rs1] - R[rs2]

Binary Conversion:

R-TYPE  funct7        rs2           rs1        funct3      rd        opcode  

Bits           7              5              5             3           5             7

Binary   100000    00101      00111       000     00110     0110011

So Binary representation for this is: 0100 0000 0101 0011 1000 0011 0011 0011