mfdcr

Move From Device Control Register

mfdcr RT, DCRN

Reads an on-chip peripheral register (DCR).

Encoding

Binary Layout

31

0:5

RT

6:10

DCRN

11:20

323

21:30

/

31

 

Format XFX-form

Opcode 0x7C000286

Extension Embedded

Operands

• RT
  Target
• DCRN
  DCR Number

Example

mfdcr r3, 0

Related

More in Embedded

Reference

View in PowerISA v3.1C Specification ↗ OPF Power ISA v3.1C

Description

Reads a Device Control Register (DCR) and writes the value to general-purpose register RT. This instruction is privileged and device-specific; the DCR address is specified by DCRN. Access to DCR is implementation-dependent and may not be available on all processors.

Operation

RT ← DCR[DCRN]