mtdcr

Move To Device Control Register

mtdcr DCRN, RS

Writes an on-chip peripheral register (DCR).

Encoding

Binary Layout

31

0:5

RS

6:10

DCRN

11:20

451

21:30

/

31

 

Format XFX-form

Opcode 0x7C000386

Extension Embedded

Operands

• DCRN
  DCR Number
• RS
  Source

Example

mtdcr 0, r3

Related

More in Embedded

Reference

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

Description

Writes the value from general-purpose register RS to a Device Control Register (DCR) specified by DCRN. This instruction is privileged and device-specific. Access to DCR is implementation-dependent and may not be available on all processors; the effects depend on the target DCR.

Operation

DCR[DCRN] ← RS