CSRW

Control Status Register Write

CSRW csr, rs

Writes a register value to a CSR.

Details

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

Pseudocode Operation

CSRs[csr] = R[rs];

Example

CSRW mepc, x10

Encoding

Binary Layout

imm[11:0]

31:20

rs1

19:15

001

14:12

00000

11:7

1110011

6:0

Format I-Type

Opcode 0x73

Extension Pseudo

Operands

csr
CSR Address
rs
Source