Nios® II Processor Reference Guide

ID 683836
Date 10/22/2020
Public
Document Table of Contents

8.5.75. rdctl

Instruction read from control register
Operation

rC ←  ctlN

Assembler Syntax

rdctl rC, ctlN

Example

rdctl r3, ctl31

Description

Reads the value contained in control register ctlN and writes it to register rC.

Exceptions

Supervisor-only instruction

Instruction Type

R

Instruction Fields

C = Register index of operand rC

N = Control register index of operand ctlN

Bit Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0 0 C 0x26
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0x26 N 0x3a

Did you find the information on this page useful?

Characters remaining:

Feedback Message