CSRW

Control Status Register Write

CSRW csr, rs

Writes a register value to a CSR.

Encoding

Binary Layout

csr

31:20

rs1

19:15

001000001110011

14:0

 

Format I-Type

Opcode 0x00001073

Extension Pseudo

Operands

• csr
  CSR Address
• rs
  Source

Example

CSRW mepc, x10

// Write address in x10 to mepc.

Related

More in Pseudo

Reference

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

Description

CSRW is an assembler pseudoinstruction for CSRRW x0, csr, rs1. It writes rs1 to the CSR without reading it.

Operation

CSRs[csr] = R[rs];