Assembler Language Reference

lfsx (Load Floating-Point Single Indexed) Instruction

Purpose

Loads a floating-point, single-precision number that has been converted to a floating-point, double-precision number into a floating-point register.

Syntax

Bits	Value
0-5	31
6-10	FRT
11-15	RA
16-20	RB
21-30	535
31	/

lfsx	FRT, RA, RB

Description

The lfsx instruction converts a floating-point, single-precision word in storage addressed by the effective address (EA) to floating-point, double-precision word and loads the result into floating-point register (FPR) FRT.

If general-purpose register (GPR) RA is not 0, the EA is the sum of the contents of GPR RA and GPR RB. If RA is 0, then the EA is the contents of GPR RB.

The lfsx instruction has one syntax form and does not affect the Floating-Point Status and Control Register.

Parameters

FRT	Specifies target floating-point register where data is stored.
RA	Specifies source general-purpose register for EA calculation.
RB	Specifies source general-purpose register for EA calculation.

Examples

The following code loads the single-precision contents of storage into FPR 6:

storage: .float 0x1.
# Assume GPR 4 contains the address of storage.
lfsx 6,0,4
# FPR 6 now contains 0x3FF0 0000 0000 0000.

Related Information

Floating-Point Processor .

Floating-Point Load and Store Instructions .