jdk.internal.jvmci.hotspot.amd64

Class AMD64HotSpotRegisterConfig

java.lang.Object

jdk.internal.jvmci.hotspot.amd64.AMD64HotSpotRegisterConfig

All Implemented Interfaces:

RegisterConfig

public class AMD64HotSpotRegisterConfig
extends Object
implements RegisterConfig

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	allAllocatableAreCallerSaved
private Register[]	allocatable
private Architecture	architecture
private RegisterAttributes[]	attributesMap
private Register[]	callerSaved The caller saved registers always include all parameter registers.
private CalleeSaveLayout	csl
private Register[]	javaGeneralParameterRegisters
private int	maxFrameSize
private Register[]	nativeGeneralParameterRegisters
private boolean	needsNativeStackHomeSpace
private Register[]	xmmParameterRegisters

Constructor Summary

Constructors

Constructor and Description
AMD64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config)
AMD64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config, Register[] allocatable)

Method Summary

Modifier and Type	Method and Description
boolean	areAllAllocatableRegistersCallerSaved() Determines if all allocatable registers are caller saved.
private CallingConvention	callingConvention(Register[] generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, CallingConvention.Type type, TargetDescription target, boolean stackOnly)
Register[]	filterAllocatableRegisters(PlatformKind kind, Register[] registers) Filters a set of registers and returns only those that can be used by the register allocator for a value of a particular kind.
Register[]	getAllocatableRegisters() Gets the set of all registers that might be used by the register allocator.
RegisterAttributes[]	getAttributesMap() Gets a map from register numbers to register attributes for this register configuration.
CalleeSaveLayout	getCalleeSaveLayout() Gets the layout of the callee save area of this register configuration.
Register[]	getCallerSaveRegisters() Gets the registers whose values must be preserved by a method across any call it makes.
CallingConvention	getCallingConvention(CallingConvention.Type type, JavaType returnType, JavaType[] parameterTypes, TargetDescription target, boolean stackOnly) Gets the calling convention describing how arguments are passed.
Register[]	getCallingConventionRegisters(CallingConvention.Type type, Kind kind) Gets the ordered set of registers that are can be used to pass parameters according to a given calling convention.
Register	getFrameRegister() Gets the register to which Register.Frame and Register.CallerFrame are bound.
int	getMaximumFrameSize() Gets the maximum allowed size of the frame.
Register	getRegisterForRole(int index) Gets the register corresponding to a runtime-defined role.
Register	getReturnRegister(Kind kind) Gets the register to be used for returning a value of a given kind.
private static Register[]	initAllocatable(boolean reserveForHeapBase)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

architecture

private final Architecture architecture

allocatable

private final Register[] allocatable

maxFrameSize

private final int maxFrameSize

callerSaved

private final Register[] callerSaved

The caller saved registers always include all parameter registers.

allAllocatableAreCallerSaved

private final boolean allAllocatableAreCallerSaved

attributesMap

private final RegisterAttributes[] attributesMap

javaGeneralParameterRegisters

private final Register[] javaGeneralParameterRegisters

nativeGeneralParameterRegisters

private final Register[] nativeGeneralParameterRegisters

xmmParameterRegisters

private final Register[] xmmParameterRegisters

needsNativeStackHomeSpace

private final boolean needsNativeStackHomeSpace

csl

private final CalleeSaveLayout csl

Constructor Detail

AMD64HotSpotRegisterConfig

public AMD64HotSpotRegisterConfig(Architecture architecture,
                                  HotSpotVMConfig config)

AMD64HotSpotRegisterConfig

public AMD64HotSpotRegisterConfig(Architecture architecture,
                                  HotSpotVMConfig config,
                                  Register[] allocatable)

Method Detail

getMaximumFrameSize

public int getMaximumFrameSize()

Description copied from interface: RegisterConfig

Gets the maximum allowed size of the frame.

Specified by:

getMaximumFrameSize in interface RegisterConfig

getAllocatableRegisters

public Register[] getAllocatableRegisters()

Description copied from interface: RegisterConfig

Gets the set of all registers that might be used by the register allocator. To get the set of registers the register allocator is allowed to use see RegisterAllocationConfig#getAllocatableRegisters()

Specified by:

getAllocatableRegisters in interface RegisterConfig

filterAllocatableRegisters

public Register[] filterAllocatableRegisters(PlatformKind kind,
                                             Register[] registers)

Description copied from interface: RegisterConfig

Filters a set of registers and returns only those that can be used by the register allocator for a value of a particular kind.

Specified by:

filterAllocatableRegisters in interface RegisterConfig

getAttributesMap

public RegisterAttributes[] getAttributesMap()

Description copied from interface: RegisterConfig

Gets a map from register numbers to register attributes for this register configuration.

Specified by:

getAttributesMap in interface RegisterConfig

Returns:

an array where an element at index i holds the attributes of the register whose number is i

initAllocatable

private static Register[] initAllocatable(boolean reserveForHeapBase)

getCallerSaveRegisters

public Register[] getCallerSaveRegisters()

Description copied from interface: RegisterConfig

Gets the registers whose values must be preserved by a method across any call it makes.

Specified by:

getCallerSaveRegisters in interface RegisterConfig

areAllAllocatableRegistersCallerSaved

public boolean areAllAllocatableRegistersCallerSaved()

Description copied from interface: RegisterConfig

Determines if all allocatable registers are caller saved.

Specified by:

areAllAllocatableRegistersCallerSaved in interface RegisterConfig

getRegisterForRole

public Register getRegisterForRole(int index)

Description copied from interface: RegisterConfig

Gets the register corresponding to a runtime-defined role.

Specified by:

getRegisterForRole in interface RegisterConfig

Parameters:

index - the identifier of a runtime-defined register role

Returns:

the register playing the role specified by id

getCallingConvention

public CallingConvention getCallingConvention(CallingConvention.Type type,
                                              JavaType returnType,
                                              JavaType[] parameterTypes,
                                              TargetDescription target,
                                              boolean stackOnly)

Description copied from interface: RegisterConfig

Gets the calling convention describing how arguments are passed.

Specified by:

getCallingConvention in interface RegisterConfig

Parameters:

type - the type of calling convention being requested

returnType - the return type (can be null for methods returning void)

parameterTypes - the types of the arguments of the call

target - the target platform

stackOnly - ignore registers

getCallingConventionRegisters

public Register[] getCallingConventionRegisters(CallingConvention.Type type,
                                                Kind kind)

Description copied from interface: RegisterConfig

Gets the ordered set of registers that are can be used to pass parameters according to a given calling convention.

Specified by:

getCallingConventionRegisters in interface RegisterConfig

Parameters:

type - the type of calling convention

kind - specifies what kind of registers is being requested

Returns:

the ordered set of registers that may be used to pass parameters in a call conforming to type

callingConvention

private CallingConvention callingConvention(Register[] generalParameterRegisters,
                                            JavaType returnType,
                                            JavaType[] parameterTypes,
                                            CallingConvention.Type type,
                                            TargetDescription target,
                                            boolean stackOnly)

getReturnRegister

public Register getReturnRegister(Kind kind)

Description copied from interface: RegisterConfig

Gets the register to be used for returning a value of a given kind.

Specified by:

getReturnRegister in interface RegisterConfig

getFrameRegister

public Register getFrameRegister()

Description copied from interface: RegisterConfig

Gets the register to which Register.Frame and Register.CallerFrame are bound.

Specified by:

getFrameRegister in interface RegisterConfig

getCalleeSaveLayout

public CalleeSaveLayout getCalleeSaveLayout()

Description copied from interface: RegisterConfig

Gets the layout of the callee save area of this register configuration.

Specified by:

getCalleeSaveLayout in interface RegisterConfig

Returns:

null if there is no callee save area

toString

public String toString()

Overrides:

toString in class Object