Assembler Language Reference

ldux (Store Double Word with Update Indexed) Instruction

Purpose

Load a double-word of data from a specified memory location into a general purpose register. Update the address base.

Syntax

Bits	Value
0-5	31
6-10	D
11-15	A
16-20	B
21-30	53
31	0

PowerPC
ldux	RT, RA, RB

Description

The effective address (EA) is calculated from the sum of general purpose register (GPR) RA and RB. A double-word of data is read from the memory location referenced by the EA and placed into GPR RT; GRP RA is updated with the EA.

If rA = 0 or rA = rD, the instruction form is invalid.

Parameters

RT	Specifies source general-purpose register of stored data.
RA	Specifies source general-purpose register for EA calculation.
RB	Specifies source general-purpose register for EA calculation.

Implementation

This instruction is defined only for 64-bit implementations. Using it on a 32-bit implementation will cause the system illegal instruction error handler to be invoked.