pli

Prefixed Load Immediate

pli RT, SI34

Loads a 34-bit signed immediate into a register. (Replaces multiple 'lis/ori' instructions).

Encoding

Binary Layout

1

0:5

2

6:7

R

8

0

9:13

D0

14:31

14

32:37

RT

38:42

0

43:47

D1

48:63

 

Format MLS:D-form

Opcode 0x0400000038000000

Extension Prefixed

Operands

• RT
  Target
• SI34
  Immediate

Example

pli r3, 16

Related

More in Prefixed

Reference

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

Description

Loads a 34-bit signed immediate value into GPR RT, replacing the need for multiple lis/ori instructions. This is a prefixed instruction (2 words / 64 bits total) where the prefix encodes bits 0-17 and the main instruction encodes bits 18-33 of the immediate. No condition registers or status fields are affected.

Operation

RA ← SI34 (sign-extended to 64 bits)

Programming Note

The pli instruction is used to load an immediate value directly into a target register. This is useful for initializing registers with constants or small values. Ensure the immediate value fits within the 16-bit signed integer range to avoid overflow issues.