jdk.internal.jvmci.code

Class TargetDescription

java.lang.Object

jdk.internal.jvmci.code.TargetDescription

public class TargetDescription
extends Object

Represents the target machine for a compiler, including the CPU architecture, the size of pointers and references, alignment of stacks, caches, etc.

Field Summary

Fields

Modifier and Type	Field and Description
Architecture	arch
int	implicitNullCheckLimit Maximum constant displacement at which a memory access can no longer be an implicit null check.
boolean	inlineObjects Specifies if this target supports encoding objects inline in the machine code.
boolean	isMP Specifies if this is a multi-processor system.
int	stackAlignment The stack alignment requirement of the platform.
Kind	wordKind The kind to be used for representing raw pointers and CPU registers.
int	wordSize The machine word size on this target.

Constructor Summary

Constructors

Constructor and Description
TargetDescription(Architecture arch, boolean isMP, int stackAlignment, int implicitNullCheckLimit, boolean inlineObjects)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
LIRKind	getLIRKind(Kind javaKind)
int	getSizeInBytes(PlatformKind kind)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

arch

public final Architecture arch

isMP

public final boolean isMP

Specifies if this is a multi-processor system.

inlineObjects

public final boolean inlineObjects

Specifies if this target supports encoding objects inline in the machine code.

wordSize

public final int wordSize

The machine word size on this target.

wordKind

public final Kind wordKind

The kind to be used for representing raw pointers and CPU registers.

stackAlignment

public final int stackAlignment

The stack alignment requirement of the platform. For example, from Appendix D of Intel 64 and IA-32 Architectures Optimization Reference Manual:

     "It is important to ensure that the stack frame is aligned to a
      16-byte boundary upon function entry to keep local __m128 data,
      parameters, and XMM register spill locations aligned throughout
      a function invocation."
 

implicitNullCheckLimit

public final int implicitNullCheckLimit

Maximum constant displacement at which a memory access can no longer be an implicit null check.

Constructor Detail

TargetDescription

public TargetDescription(Architecture arch,
                         boolean isMP,
                         int stackAlignment,
                         int implicitNullCheckLimit,
                         boolean inlineObjects)

Method Detail

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

equals

public final boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

getSizeInBytes

public int getSizeInBytes(PlatformKind kind)

getLIRKind

public LIRKind getLIRKind(Kind javaKind)