com.oracle.graal.asm.amd64

Class AMD64Address

java.lang.Object

jdk.internal.jvmci.code.AbstractAddress

com.oracle.graal.asm.amd64.AMD64Address

public final class AMD64Address
extends AbstractAddress

Represents an address in target machine memory, specified via some combination of a base register, an index register, a displacement and a scale. Note that the base and index registers may be a variable that will get a register assigned later by the register allocator.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AMD64Address.Scale A scaling factor used in the SIB addressing mode.

Field Summary

Fields

Modifier and Type	Field and Description
private Register	base
private int	displacement
private Register	index
private AMD64Address.Scale	scale

Constructor Summary

Constructors

Constructor and Description
AMD64Address(Register base) Creates an AMD64Address with given base register, no scaling and no displacement.
AMD64Address(Register base, int displacement) Creates an AMD64Address with given base register, no scaling and a given displacement.
AMD64Address(Register base, Register index, AMD64Address.Scale scale, int displacement) Creates an AMD64Address with given base and index registers, scaling and displacement.

Method Summary

Modifier and Type	Method and Description
Register	getBase()
int	getDisplacement()
Register	getIndex()
AMD64Address.Scale	getScale()
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

base

private final Register base

index

private final Register index

scale

private final AMD64Address.Scale scale

displacement

private final int displacement

Constructor Detail

AMD64Address

public AMD64Address(Register base)

Creates an AMD64Address with given base register, no scaling and no displacement.

Parameters:

base - the base register

AMD64Address

public AMD64Address(Register base,
                    int displacement)

Creates an AMD64Address with given base register, no scaling and a given displacement.

Parameters:

base - the base register

displacement - the displacement

AMD64Address

public AMD64Address(Register base,
                    Register index,
                    AMD64Address.Scale scale,
                    int displacement)

Creates an AMD64Address with given base and index registers, scaling and displacement. This is the most general constructor.

Parameters:

base - the base register

index - the index register

scale - the scaling factor

displacement - the displacement

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getBase

public Register getBase()

Returns:

Base register that defines the start of the address computation. If not present, is denoted by Register.None.

getIndex

public Register getIndex()

Returns:

Index register, the value of which (possibly scaled by getScale()) is added to getBase(). If not present, is denoted by Register.None.

getScale

public AMD64Address.Scale getScale()

Returns:

Scaling factor for indexing, dependent on target operand size.

getDisplacement

public int getDisplacement()

Returns:

Optional additive displacement.