mcrf

Move Condition Register Field

mcrf BF, BFA

Copies the contents of one Condition Register field to another. Used to save comparison results.

Encoding

Binary Layout

00000

0:5

CRFD

6:8

CRFS

9:10

00000

11:13

00000

14:15

00000

16:20

00000

21:30

00000

31

 

Format XL-form

Opcode 0x4C000000

Extension Base

Operands

• BF
  Target Field (0-7)
• BFA
  Source Field (0-7)
• CRFD
  Destination Condition Register Field
• CRFS
  Source Condition Register Field

Example

mcrf cr0, cr7

// Copy result from CR7 to CR0.

Registers Altered

CR0, CR1-CR7

Related

More in Base

Reference

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

Description

The contents of Condition Register field BFA are copied to Condition Register field BF.

Operation

CR4×BF+32:4×BF+35 ← CR4×BFA+32:4×BFA+35

Programming Note

Use mcrf to copy condition register fields, ensuring BFA and BF are valid. This instruction operates at user privilege level and does not raise exceptions under normal conditions.