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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

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.


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