ldx (Load Doubleword Indexed) instruction
Purpose
Loads a doubleword from a specified memory location into a general purpose register (GPR).
Syntax
| Bits | Value |
|---|---|
| 0 - 5 | 31 |
| 6 - 10 | D |
| 11 - 15 | A |
| 16 - 20 | B |
| 21 - 30 | 21 |
| 31 | 0 |
| PowerPC® | |
|---|---|
| ldx | RT RA, RB |
Description
The ldx instruction loads a doubleword from the specified memory location that is referenced by the effective address (EA) into the GPR RT.
If GRP RA is not 0, the effective address (EA) is the sum of the contents of GRPs, RA and RB. Otherwise, the EA is equal to the contents of RB.
Parameters
| Item | Description |
|---|---|
| RT | Specifies the target GPR where the result of the operation is stored. |
| RA | Specifies the source GPR for the EA calculation. |
| RB | Specifies the source GPR for the EA calculation. |
Implementation
This instruction is defined only for 64-bit implementations. Using it on a 32-bit implementation calls the system illegal instruction error handler.