scale.clef.type
Class RealType

java.lang.Object
  scale.common.Root
      scale.clef.Node
          scale.clef.type.Type
              scale.clef.type.AtomicType
                  scale.clef.type.NumericType
                      scale.clef.type.RealType

All Implemented Interfaces:

AnnotationInterface, DisplayNode

Direct Known Subclasses:

FloatType

public abstract class RealType
extends NumericType

This is the base class for all scaled types such a C's float and double types.

$Id: RealType.java,v 1.32 2007-03-21 13:32:00 burrill Exp $

Copyright 2005 by the Scale Compiler Group,
Department of Computer Science
University of Massachusetts,
Amherst MA. 01003, USA
All Rights Reserved.

The size of the type is specified as the minimum number of bits that are required to represent a value of that type.

Constructor Summary

RealType(int minbitSize)

Method Summary

int	bitSize() Return the number of bits required to represent the type.
boolean	isRealType() Return true if type represents a floating point value.
java.lang.String	mapTypeToCString() Map a type to a C string.
java.lang.String	mapTypeToF77String() Map a type to a Fortran string.
RealType	returnRealType() Return if this is a RealType, return this.
void	visit(Predicate p) Process a node by calling its associated routine.
void	visit(TypePredicate p) Process a node by calling its associated routine.

Methods inherited from class scale.clef.type.NumericType

isNumericType, returnNumericType

Methods inherited from class scale.clef.type.AtomicType

alignment, isAtomicType, memorySize, returnAtomicType

Methods inherited from class scale.clef.type.Type

canBeInRegister, cleanup, elementSize, equivalent, getCompleteType, getCoreType, getDisplayColorHint, getDisplayLabel, getDisplayShapeHint, getEquivalentType, getNonAttributeType, getNonConstType, getPointedTo, getPointedToCore, getRank, getSignedType, getTag, getType, isAggregateType, isAllocArrayType, isArrayType, isAttributeSet, isBooleanType, isCharacterType, isClassType, isComplexType, isCompositeType, isConst, isEnumerationType, isFixedArrayType, isFloatType, isFortranCharType, isIncompleteType, isIntegerType, isNamedType, isPointerType, isProcedureType, isRefType, isRestricted, isSigned, isUnionType, isVoidType, isVolatile, memorySizeAsInt, nextVisit, numberOfElements, precedence, registerType, returnAggregateType, returnAllocArrayType, returnArrayType, returnBooleanType, returnCharacterType, returnComplexType, returnCompositeType, returnEnumerationType, returnFixedArrayType, returnFloatType, returnFortranCharType, returnIncompleteType, returnIntegerType, returnPointerType, returnProcedureType, returnRecordType, returnRefType, returnSignedIntegerType, returnUnionType, returnUnsignedIntegerType, returnVoidType, setTag, setVisited, specifyCanBeInRegister, toString, toStringShort, visited

Methods inherited from class scale.clef.Node

getChild, getDecl, getSourceLineNumber, numChildren, setAnnotationLevel, setReportLevel, setSourceLineNumber, toString, toStringChildren, toStringSpecial

Methods inherited from class scale.common.Root

addAnnotation, allAnnotations, allMatchingAnnotations, getAnnotation, getDisplayName, getDisplayString, getNodeCount, getNodeID, hasAnnotation, hasEqualAnnotation, hashCode, removeAnnotation, removeAnnotations, toStringAnnotations, toStringClass, trace, trace, trace

Methods inherited from class java.lang.Object

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

Constructor Detail

RealType

public RealType(int minbitSize)

Parameters:

minbitSize - is the minimum number of bits required to represent a value of this type

Method Detail

bitSize

public int bitSize()

Description copied from class: AtomicType

Return the number of bits required to represent the type.

Specified by:

bitSize in class AtomicType

isRealType

public boolean isRealType()

Return true if type represents a floating point value.

Overrides:

isRealType in class Type

returnRealType

public final RealType returnRealType()

Description copied from class: Type

Return if this is a RealType, return this. Otherwise, return null.

Overrides:

returnRealType in class Type

visit

public void visit(Predicate p)

Description copied from class: Node

Process a node by calling its associated routine. See the "visitor" design pattern in Design Patterns: Elements of Reusable Object-Oriented Software by E. Gamma, et al, Addison Wesley, ISBN 0-201-63361-2.

Each class has a visit(Predicate p) method. For example, in class ABC:

   public void visit(Predicate p)
   {
     p.visitABC(this);
   }
 

and the class that implements Predicate has a method

   public void visitABC(Node n)
   {
     ABC a = (ABC) n;
     ...
   }
 

Thus, the class that implements Predicate can call

   n.visit(this);
 

where n is a Node sub-class without determining which specific sub-class n is. The visit pattern basically avoids implementing a large switch statement or defining different methods in each class for some purpose.

Overrides:

visit in class NumericType

See Also:

Predicate

visit

public void visit(TypePredicate p)

Description copied from class: Type

Process a node by calling its associated routine. See the "visitor" design pattern in Design Patterns: Elements of Reusable Object-Oriented Software by E. Gamma, et al, Addison Wesley, ISBN 0-201-63361-2.

Each type class has a visit(TypePredicate p) method. For example, in class ABC:

   public void visit(Predicate p)
   {
     p.visitABC(this);
   }
 

and the class that implements Predicate has a method

   public void visitABC(Node n)
   {
     ABC a = (ABC) n;
     ...
   }
 

Thus, the class that implements TypePredicate can call

   n.visit(this);
 

where n is a Node sub-class without determining which specific sub-class n is. The visit pattern basically avoids implementing a large switch statement or defining different methods in each class for some purpose.

Overrides:

visit in class NumericType

See Also:

TypePredicate

mapTypeToCString

public java.lang.String mapTypeToCString()

Map a type to a C string. The string representation is based upon the size of the type.

Overrides:

mapTypeToCString in class Type

Returns:

the string representation of the type

mapTypeToF77String

public java.lang.String mapTypeToF77String()

Map a type to a Fortran string. The string representation is based upon the size of the type.

Overrides:

mapTypeToF77String in class Type

Returns:

the string representation of the type