js.tinyvm
Class CodeUtilities

java.lang.Object
  js.tinyvm.CodeUtilities

All Implemented Interfaces:

OpCodeConstants, OpCodeInfo

public class CodeUtilities
extends java.lang.Object
implements OpCodeConstants, OpCodeInfo

Field Summary

Fields inherited from interface js.tinyvm.OpCodeConstants

OP_AALOAD, OP_AASTORE, OP_ACONST_NULL, OP_ALOAD, OP_ALOAD_0, OP_ALOAD_1, OP_ALOAD_2, OP_ALOAD_3, OP_ANEWARRAY, OP_ARETURN, OP_ARRAYLENGTH, OP_ASTORE, OP_ASTORE_0, OP_ASTORE_1, OP_ASTORE_2, OP_ASTORE_3, OP_ATHROW, OP_BALOAD, OP_BASTORE, OP_BIPUSH, OP_BREAKPOINT, OP_CALOAD, OP_CASTORE, OP_CHECKCAST, OP_D2F, OP_D2I, OP_D2L, OP_DADD, OP_DALOAD, OP_DASTORE, OP_DCMPG, OP_DCMPL, OP_DCONST_0, OP_DCONST_1, OP_DDIV, OP_DLOAD, OP_DLOAD_0, OP_DLOAD_1, OP_DLOAD_2, OP_DLOAD_3, OP_DMUL, OP_DNEG, OP_DREM, OP_DRETURN, OP_DSTORE, OP_DSTORE_0, OP_DSTORE_1, OP_DSTORE_2, OP_DSTORE_3, OP_DSUB, OP_DUP, OP_DUP_X1, OP_DUP_X2, OP_DUP2, OP_DUP2_X1, OP_DUP2_X2, OP_F2D, OP_F2I, OP_F2L, OP_FADD, OP_FALOAD, OP_FASTORE, OP_FCMPG, OP_FCMPL, OP_FCONST_0, OP_FCONST_1, OP_FCONST_2, OP_FDIV, OP_FLOAD, OP_FLOAD_0, OP_FLOAD_1, OP_FLOAD_2, OP_FLOAD_3, OP_FMUL, OP_FNEG, OP_FREM, OP_FRETURN, OP_FSTORE, OP_FSTORE_0, OP_FSTORE_1, OP_FSTORE_2, OP_FSTORE_3, OP_FSUB, OP_GETFIELD, OP_GETSTATIC, OP_GOTO, OP_GOTO_W, OP_I2B, OP_I2C, OP_I2D, OP_I2F, OP_I2L, OP_I2S, OP_IADD, OP_IALOAD, OP_IAND, OP_IASTORE, OP_ICONST_0, OP_ICONST_1, OP_ICONST_2, OP_ICONST_3, OP_ICONST_4, OP_ICONST_5, OP_ICONST_M1, OP_IDIV, OP_IF_ACMPEQ, OP_IF_ACMPNE, OP_IF_ICMPEQ, OP_IF_ICMPGE, OP_IF_ICMPGT, OP_IF_ICMPLE, OP_IF_ICMPLT, OP_IF_ICMPNE, OP_IFEQ, OP_IFGE, OP_IFGT, OP_IFLE, OP_IFLT, OP_IFNE, OP_IFNONNULL, OP_IFNULL, OP_IINC, OP_ILOAD, OP_ILOAD_0, OP_ILOAD_1, OP_ILOAD_2, OP_ILOAD_3, OP_IMUL, OP_INEG, OP_INSTANCEOF, OP_INVOKEINTERFACE, OP_INVOKESPECIAL, OP_INVOKESTATIC, OP_INVOKEVIRTUAL, OP_IOR, OP_IREM, OP_IRETURN, OP_ISHL, OP_ISHR, OP_ISTORE, OP_ISTORE_0, OP_ISTORE_1, OP_ISTORE_2, OP_ISTORE_3, OP_ISUB, OP_IUSHR, OP_IXOR, OP_JSR, OP_JSR_W, OP_L2D, OP_L2F, OP_L2I, OP_LADD, OP_LALOAD, OP_LAND, OP_LASTORE, OP_LCMP, OP_LCONST_0, OP_LCONST_1, OP_LDC, OP_LDC_W, OP_LDC2_W, OP_LDIV, OP_LLOAD, OP_LLOAD_0, OP_LLOAD_1, OP_LLOAD_2, OP_LLOAD_3, OP_LMUL, OP_LNEG, OP_LOOKUPSWITCH, OP_LOR, OP_LREM, OP_LRETURN, OP_LSHL, OP_LSHR, OP_LSTORE, OP_LSTORE_0, OP_LSTORE_1, OP_LSTORE_2, OP_LSTORE_3, OP_LSUB, OP_LUSHR, OP_LXOR, OP_MONITORENTER, OP_MONITOREXIT, OP_MULTIANEWARRAY, OP_NEW, OP_NEWARRAY, OP_NOP, OP_POP, OP_POP2, OP_PUTFIELD, OP_PUTSTATIC, OP_RET, OP_RETURN, OP_SALOAD, OP_SASTORE, OP_SIPUSH, OP_SWAP, OP_TABLESWITCH, OP_WIDE, OP_XXXUNUSEDXXX

Fields inherited from interface js.tinyvm.OpCodeInfo

OP_GETFIELD_1, OP_GETSTATIC_1, OP_GETSTATIC_2, OP_GETSTATIC_3, OP_GETSTATIC_4, OP_LDC_1, OP_LDC_2, OP_LDC_3, OP_LDC_4, OP_PUTFIELD_1, OP_PUTSTATIC_1, OP_PUTSTATIC_2, OP_PUTSTATIC_3, OP_PUTSTATIC_4, OPCODE_ARGS, OPCODE_NAME

Constructor Summary

CodeUtilities(java.lang.String aMethodName, org.apache.bcel.classfile.JavaClass aCF, Binary aBinary)

Method Summary

void	exitOnBadOpCode(int aOpCode)
static java.lang.String	fullMethod(org.apache.bcel.classfile.JavaClass aCF, java.lang.String aMethodName)
int	genConstantLoad(int aPoolIndex) Process a constant load operation.
int	genStaticAccess(int aPoolIndex, int optInst, int normInst) Generate and instruction to access a static field.
void	markArray(int aPoolIndex) Mark an array as being used.
void	markClass(int aPoolIndex) Mark the class as being used.
void	markPrimitiveArray(byte type) Mark a primitive array as being used.
int	processArray(int aPoolIndex) Process and array index.
void	processCalls(byte[] aCode, org.apache.bcel.classfile.JavaClass aClassFile, Binary aBinary)
int	processClassIndex(int aPoolIndex) Process a class index.
byte[]	processCode(byte[] aCode)
int	processConstantIndex(int aPoolIndex) Process a constant index.
int	processMultiArray(int aPoolIndex)

Methods inherited from class java.lang.Object

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

Constructor Detail

CodeUtilities

public CodeUtilities(java.lang.String aMethodName,
                     org.apache.bcel.classfile.JavaClass aCF,
                     Binary aBinary)

Method Detail

exitOnBadOpCode

public void exitOnBadOpCode(int aOpCode)
                     throws TinyVMException

Throws:

TinyVMException

fullMethod

public static java.lang.String fullMethod(org.apache.bcel.classfile.JavaClass aCF,
                                          java.lang.String aMethodName)

processConstantIndex

public int processConstantIndex(int aPoolIndex)
                         throws TinyVMException

Process a constant index. Given a reference to the constant pool, return the corresponding index into the leJOS constant table.

Parameters:

aPoolIndex - the constant pool index

Returns:

The constant table index

Throws:

TinyVMException

processClassIndex

public int processClassIndex(int aPoolIndex)
                      throws TinyVMException

Process a class index. Given a constant pool index for a class object, return the corresponding index into the leJOS class table.

Parameters:

aPoolIndex - the constant pool index

Returns:

the class table index

Throws:

TinyVMException

processArray

public int processArray(int aPoolIndex)
                 throws TinyVMException

Process and array index. Given an index into the constant pool for an array class, return the corresponding index into the leJOS class table.

Parameters:

aPoolIndex - the constant index for the array

Returns:

the class table index.

Throws:

TinyVMException

processMultiArray

public int processMultiArray(int aPoolIndex)
                      throws TinyVMException

Throws:

TinyVMException

markClass

public void markClass(int aPoolIndex)
               throws TinyVMException

Mark the class as being used.

Parameters:

aPoolIndex -

Throws:

TinyVMException

markArray

public void markArray(int aPoolIndex)
               throws TinyVMException

Mark an array as being used.

Parameters:

aPoolIndex - The constant pool index for the array.

Throws:

TinyVMException

markPrimitiveArray

public void markPrimitiveArray(byte type)
                        throws TinyVMException

Mark a primitive array as being used.

Parameters:

type - The primitive type of the array.

Throws:

TinyVMException

genConstantLoad

public int genConstantLoad(int aPoolIndex)
                    throws TinyVMException

Process a constant load operation. Given a reference to the constant pool, return the corresponding instruction and index required to load it.

Parameters:

aPoolIndex - the constant pool index

Returns:

The constant load instruction.

Throws:

TinyVMException

genStaticAccess

public int genStaticAccess(int aPoolIndex,
                           int optInst,
                           int normInst)
                    throws TinyVMException

Generate and instruction to access a static field.

Parameters:

aPoolIndex - The field to access

optInst - The optimized version of the instruction

normInst - The normal version of the instruction.

Returns:

Throws:

TinyVMException

processCode

public byte[] processCode(byte[] aCode)
                   throws TinyVMException

Throws:

TinyVMException

processCalls

public void processCalls(byte[] aCode,
                         org.apache.bcel.classfile.JavaClass aClassFile,
                         Binary aBinary)
                  throws TinyVMException

Throws:

TinyVMException