Assembler Language Reference

lwaux (Load Word Algebraic with Update Indexed) Instruction

Purpose

Load a fullword of data from storage into the low-order 32b its of the specified general purpose register. Sign extend the data into the high-order 32 bits of the register. Update the address base.

Syntax

Bits	Value
0-5	31
6-10	D
11-15	A
16-20	B
21-30	373
31	0

POWER family
lwaux	RT, RA, RB

Description

The fullword in storage located at the effective address (EA) is loaded into the low-order 32 bits of the target general puspose register (GRP). The value is then sign-extended to fill the high-order 32 bits of the register. The EA is the sum of the contents of GRP RA and GRP RB.

If RA = 0 or RA = RT, the instruction form is invalid.

Parameters

RT	Specifies target general-purpose register where result of the operation is stored.
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.