org.jikesrvm.compilers.opt.bc2ir

Class GenerateMagic

java.lang.Object

org.jikesrvm.compilers.opt.bc2ir.GenerateMagic

public class GenerateMagic
extends Object

This class implements the non-machine-specific magics for the opt compiler. By non-machine-specific we mean that the IR generated to implement the magic is independent of the target-architecture. It does not mean that the eventual MIR that implements the magic won't differ from architecture to architecture.

Field Summary

Fields

Modifier and Type	Field and Description
private static int	ATTEMPT_OP
private static int	LOAD_OP
private static int	PREPARE_OP
private static int	STORE_OP

Constructor Summary

Constructors

Constructor and Description
GenerateMagic()

Method Summary

Modifier and Type	Method and Description
private static Instruction	_cmpHelper(BC2IR bc2ir, GenerationContext gc, ConditionOperand cond, Operand given_o2)
(package private) static boolean	generateMagic(BC2IR bc2ir, GenerationContext gc, MethodReference meth) "Semantic inlining" of methods of the Magic class.
(package private) static boolean	generatePolymorphicMagic(BC2IR bc2ir, GenerationContext gc, MethodReference meth, Atom methodName)
private static Operator	getOperator(TypeReference type, int operatorClass)
private static boolean	isLoad(Atom methodName)
private static boolean	isPrefix(Atom prefix, byte[] b) Is string a a prefix of string b.
private static boolean	isPrepare(Atom methodName)
private static LocationOperand	mapToMetadata(Operand metadata)

Methods inherited from class java.lang.Object

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

Field Detail

LOAD_OP

private static final int LOAD_OP

See Also:

Constant Field Values

PREPARE_OP

private static final int PREPARE_OP

See Also:

Constant Field Values

STORE_OP

private static final int STORE_OP

See Also:

Constant Field Values

ATTEMPT_OP

private static final int ATTEMPT_OP

See Also:

Constant Field Values

Constructor Detail

GenerateMagic

public GenerateMagic()

Method Detail

generateMagic

static boolean generateMagic(BC2IR bc2ir,
                             GenerationContext gc,
                             MethodReference meth)
                      throws MagicNotImplementedException

"Semantic inlining" of methods of the Magic class. Based on the methodName, generate a sequence of opt instructions that implement the magic, updating the expression stack as necessary.

Parameters:

bc2ir - the bc2ir object that is generating the ir containing this magic

gc - must be bc2ir.gc

meth - the RVMMethod that is the magic method

Returns:

true if and only if magic was generated

Throws:

MagicNotImplementedException

generatePolymorphicMagic

static boolean generatePolymorphicMagic(BC2IR bc2ir,
                                        GenerationContext gc,
                                        MethodReference meth,
                                        Atom methodName)

_cmpHelper

private static Instruction _cmpHelper(BC2IR bc2ir,
                                      GenerationContext gc,
                                      ConditionOperand cond,
                                      Operand given_o2)

mapToMetadata

private static LocationOperand mapToMetadata(Operand metadata)

getOperator

private static Operator getOperator(TypeReference type,
                                    int operatorClass)
                             throws MagicNotImplementedException

Throws:

MagicNotImplementedException

isLoad

private static boolean isLoad(Atom methodName)

isPrepare

private static boolean isPrepare(Atom methodName)

isPrefix

private static boolean isPrefix(Atom prefix,
                                byte[] b)

Is string a a prefix of string b. String b is encoded as an ASCII byte array.

Parameters:

prefix - Prefix atom

b - String which may contain prefix, encoded as an ASCII byte array.

Returns:

true if a is a prefix of b