mflr

Move From Link Register

mflr RT

Moves LR to GPR. (Alias for 'mfspr RT, 8').

Encoding

Binary Layout

31

0:5

RT

6:10

8

11:20

339

21:30

/

31

 

Format XFX-form

Opcode 0x7C0802A6

Extension Base

Operands

• RT
  Target

Example

mflr r3

Registers Altered

LR

Related

More in Base

Reference

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

Description

Moves the Link Register (LR) to a general-purpose register. This is an alias for mfspr RT, 8 and is commonly used to save the return address before modifying LR. No status registers are affected.

Operation

RT ← LR

Programming Note

Use mflr to save the return address before making a function call, ensuring you can return correctly afterward. Ensure the target register (RT) is not reserved and is properly aligned for your architecture.