mflr

Move From Link Register

mflr RT

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

Details

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.

Pseudocode 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.

Example

mflr r3

Encoding

Binary Layout
31
0
RT
6
8
11
339
21
/
31
 
Format XFX-form
Opcode 0x7C0802A6
Extension Base
Registers Altered LR

Operands

  • RT
    Target