Assembler Language Reference

lfd (Load Floating-Point Double) Instruction

Purpose

Loads a doubleword of data from a specified location in memory into a floating-point register.

Syntax

Bits	Value
0-5	50
6-10	FRT
11-15	RA
16-31	D

lfd	FRT, D( RA)

Description

The lfd instruction loads a doubleword in storage from a specified location in memory addressed by the effective address (EA) into the target 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 D, a 16-bit, signed two's complement integer sign-extended to 32 bits. If GPR RA is 0, then the EA is D.

The lfd instruction has one syntax form and does not affect the Floating-Point Status and Control Register or Condition Register Field 0.

Parameters

FRT	Specifies target general-purpose register where result of the operation is stored.
D	16-bit, signed two's complement integer sign-extended to 32 bits for the EA calculation.
RA	Specifies source general-purpose register for the EA calculation.

Examples

The following code loads a doubleword from memory into FPR 6:

.csect data[rw]
storage: .double 0x1
# Assume GPR 5 contains the address of csect data[rw].
.csect text[pr]
lfd 6,storage(5)
# FPR 6 now contains 0x3FF0 0000 0000 0000.

Related Information

Floating-Point Processor .

Floating-Point Load and Store Instructions .