li

Load Immediate

li RT, SIM

Loads a 16-bit signed immediate into a register. (Alias for 'addi RT, 0, SIM').

Details

Loads a 16-bit signed immediate value into the target register. This is an assembly-language alias for 'addi RT, 0, SIM' that simplifies loading small constants. No condition register flags are affected.

Pseudocode Operation

RT ← sign_extend(SIM, 16)

Programming Note

The `li` instruction is commonly used for initializing or resetting registers to specific values. Ensure the immediate value fits within the 32-bit signed integer range to avoid unexpected behavior. This instruction operates at user privilege level and does not generate exceptions unless there are issues with the instruction encoding.

Example

li r3, 4

Encoding

Binary Layout
14
0
RT
6
0
11
SIM
16
 
Format D-form
Opcode 0x38000000
Extension Base

Operands

  • RT
    Target
  • SIM
    Immediate