avrora.core.isdl.dep
Class StateUse.Index

java.lang.Object
  avrora.core.isdl.dep.StateUse.Index

Direct Known Subclasses:

StateUse.Index.Constant, StateUse.Index.Operand, StateUse.Index.OperandPlusConstant, StateUse.Index.UNKNOWN

Enclosing class:

StateUse

public static class StateUse.Index

extends java.lang.Object

The Index class represents a possible expr into a map (such as the register file or memory). An expr might be a constant, an instruction operand, a linear combination of an operand and a constant, or it could be an unknown (dynamically computed) value.

Nested Class Summary

static class	StateUse.Index.Constant
static class	StateUse.Index.Operand
static class	StateUse.Index.OperandPlusConstant
static class	StateUse.Index.UNKNOWN

Constructor Summary

StateUse.Index()

Method Summary

boolean	isConstant() The isConstant() method returns whether this expr is a constant that is not dependent on either operands to the instruction or runtime values
boolean	isKnown() The isKnown() method returns whether this expr is known statically given the instruction operands.

Methods inherited from class java.lang.Object

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

Constructor Detail

StateUse.Index

public StateUse.Index()

Method Detail

isConstant

public boolean isConstant()

The isConstant() method returns whether this expr is a constant that is not dependent on either operands to the instruction or runtime values

Returns:

true if this expr is a constant that is not dependent on either instruction operands or runtime values; false otherwise

isKnown

public boolean isKnown()

The isKnown() method returns whether this expr is known statically given the instruction operands. Thus, for a given instruction instance, this expr can be computed without runtime values.

Returns:

true if this expr can be computed solely from instruction operands.