Package org.codehaus.groovy.classgen.asm

Class BinaryIntExpressionHelper

java.lang.Object

org.codehaus.groovy.classgen.asm.BinaryExpressionWriter

org.codehaus.groovy.classgen.asm.BinaryIntExpressionHelper

Direct Known Subclasses:

BinaryBooleanExpressionHelper

public class BinaryIntExpressionHelper
extends BinaryExpressionWriter

Emits optimized bytecode for integer binary operations.

Constructor Summary

Constructors

Constructor	Description
BinaryIntExpressionHelper(WriterController wc)	Creates an integer-specialized binary expression helper.
BinaryIntExpressionHelper(WriterController wc, MethodCaller arraySet, MethodCaller arrayGet)

Method Summary

Modifier and Type	Method	Description
protected void	doubleTwoOperands(org.objectweb.asm.MethodVisitor mv)	Duplicates the two operands already on the operand stack.
protected int	getBitwiseOperationBytecode(int type)	Returns the bitwise opcode for the supplied token.
protected int	getCompareCode()
protected ClassNode	getDevisionOpResultType()
protected ClassNode	getNormalOpResultType()
protected int	getShiftOperationBytecode(int type)	Returns the shift opcode for the supplied token.
protected int	getStandardOperationBytecode(int type)	Returns the arithmetic opcode for the supplied token.
protected void	removeTwoOperands(org.objectweb.asm.MethodVisitor mv)	Removes the two operands already on the operand stack.
protected boolean	supportsDivision()
protected void	writeMinusMinus(org.objectweb.asm.MethodVisitor mv)	Emits a prefix/postfix decrement.
protected void	writePlusPlus(org.objectweb.asm.MethodVisitor mv)	Emits a prefix/postfix increment.
protected boolean	writeSpaceship(int type, boolean simulate)	writes the spaceship operator, type should be COMPARE_TO
protected boolean	writeStdCompare(int type, boolean simulate)	writes a std compare.

Methods inherited from class org.codehaus.groovy.classgen.asm.BinaryExpressionWriter

arrayGet, arraySet, getArrayGetCaller, getArrayGetResultType, getArraySetCaller, getController, setArraySetAndGet, write, writeBitwiseOp, writeDivision, writePostOrPrefixMethod, writeShiftOp, writeStdOperators

Methods inherited from class java.lang.Object

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

Constructor Details

BinaryIntExpressionHelper

public BinaryIntExpressionHelper(WriterController wc)

Creates an integer-specialized binary expression helper.

Parameters:

wc - the active writer controller

BinaryIntExpressionHelper

public BinaryIntExpressionHelper(WriterController wc,
 MethodCaller arraySet,
 MethodCaller arrayGet)

Since:

2.5.0

Method Details

writeStdCompare

protected boolean writeStdCompare(int type,
 boolean simulate)

writes a std compare. This involves the tokens IF_ICMPEQ, IF_ICMPNE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE and IF_ICMPLT

Overrides:

writeStdCompare in class BinaryExpressionWriter

Parameters:

type - the token type

Returns:

true if a successful std compare write

writeSpaceship

protected boolean writeSpaceship(int type,
 boolean simulate)

writes the spaceship operator, type should be COMPARE_TO

Overrides:

writeSpaceship in class BinaryExpressionWriter

Parameters:

type - the token type

simulate - whether to probe support without emitting bytecode

Returns:

true if a successful spaceship operator write

doubleTwoOperands

protected void doubleTwoOperands(org.objectweb.asm.MethodVisitor mv)

Duplicates the two operands already on the operand stack.

Specified by:

doubleTwoOperands in class BinaryExpressionWriter

Parameters:

mv - the current method visitor

getBitwiseOperationBytecode

protected int getBitwiseOperationBytecode(int type)

Returns the bitwise opcode for the supplied token.

Specified by:

getBitwiseOperationBytecode in class BinaryExpressionWriter

Parameters:

type - the normalized token index

Returns:

the ASM opcode

getCompareCode

protected int getCompareCode()

Specified by:

getCompareCode in class BinaryExpressionWriter

Returns:

the ASM compare opcode used by this primitive type

getNormalOpResultType

protected ClassNode getNormalOpResultType()

Specified by:

getNormalOpResultType in class BinaryExpressionWriter

Returns:

the result type for normal arithmetic operations

getShiftOperationBytecode

protected int getShiftOperationBytecode(int type)

Returns the shift opcode for the supplied token.

Specified by:

getShiftOperationBytecode in class BinaryExpressionWriter

Parameters:

type - the normalized token index

Returns:

the ASM opcode

getStandardOperationBytecode

protected int getStandardOperationBytecode(int type)

Returns the arithmetic opcode for the supplied token.

Specified by:

getStandardOperationBytecode in class BinaryExpressionWriter

Parameters:

type - the normalized token index

Returns:

the ASM opcode

removeTwoOperands

protected void removeTwoOperands(org.objectweb.asm.MethodVisitor mv)

Removes the two operands already on the operand stack.

Specified by:

removeTwoOperands in class BinaryExpressionWriter

Parameters:

mv - the current method visitor

writeMinusMinus

protected void writeMinusMinus(org.objectweb.asm.MethodVisitor mv)

Emits a prefix/postfix decrement.

Specified by:

writeMinusMinus in class BinaryExpressionWriter

Parameters:

mv - the current method visitor

writePlusPlus

protected void writePlusPlus(org.objectweb.asm.MethodVisitor mv)

Emits a prefix/postfix increment.

Specified by:

writePlusPlus in class BinaryExpressionWriter

Parameters:

mv - the current method visitor

getDevisionOpResultType

protected ClassNode getDevisionOpResultType()

Specified by:

getDevisionOpResultType in class BinaryExpressionWriter

Returns:

the result type for division operations

supportsDivision

protected boolean supportsDivision()

Overrides:

supportsDivision in class BinaryExpressionWriter

Returns:

whether this primitive helper supports division bytecode directly