pli

Prefixed Load Immediate

pli RT, SI34

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

Details

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.

Pseudocode 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.

Example

pli r3, 16

Encoding

Binary Layout
1
0
2
6
R
8
0
9
D0
14
14
32
RT
38
0
43
D1
48
 
Format MLS:D-form
Opcode 0x0400000038000000
Extension Prefixed

Operands

  • RT
    Target
  • SI34
    Immediate