fmr

Floating Move Register

fmr FRT,FRB

Copies a float register (Pseudo: for FRB).

Encoding

Binary Layout

63

0:5

FRT

6:10

0

11:15

FRB

16:20

72

21:30

/

31

 

Format X-form

Opcode 0xFC000090

Extension Floating-Point

Operands

• FRT
  Target
• FRB
  Source

Example

fmr f1, f3

Registers Altered

CR1, (if, Rc=1), FPSCR

Related

More in Floating-Point

Reference

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

Description

The contents of register FRB are placed into register FRT.

Operation

FRT <- FRB

Programming Note

The fmr instruction is used to copy the contents of one floating-point register (FRB) to another (FRT). It does not alter any special registers unless Rc=1, in which case it updates CR1. Ensure that both source and destination registers are properly aligned for optimal performance.