ORI

Logical OR Immediate

ORI rd, rs1, imm

Performs a bitwise logical OR with a sign-extended immediate.

Encoding

Binary Layout

imm12

31:20

rs1

19:15

110

14:12

rd

11:7

0010011

6:0

 

Format I-Type

Opcode 0x00006013

Extension RV32I

Operands

• rd
  Destination register (integer)
• rs1
  Source
• imm
  Signed immediate value

Example

ORI x10, x11, 1

// Sets the lowest bit of x11.

Related

More in RV32I

Reference

View in RISC-V Unprivileged ISA Specification ↗ RISC-V ISA Manual

Description

ORI performs a bitwise OR of register rs1 with the sign-extended 12-bit immediate, writing the result to rd.

Operation

R[rd] = R[rs1] | sext(imm);