ADD

Add Integer

ADD rd, rs1, rs2

Adds the contents of two registers.

Details

ADD performs an XLEN-bit addition of the values in registers rs1 and rs2, writing the result to rd. Arithmetic overflow is ignored; the result is simply the low XLEN bits of the mathematical sum.

Pseudocode Operation

R[rd] = R[rs1] + R[rs2];

Example

ADD x10, x11, x12

Encoding

Binary Layout
0000000
31:25
rs2
24:20
rs1
19:15
000
14:12
rd
11:7
0110011
6:0
 
Format R-Type
Opcode 0x33
Extension RV32I

Operands

  • rd
    Destination Register
  • rs1
    Source Register 1
  • rs2
    Source Register 2