com.cmpware.tools
Class AutoModelVLIW.Field

java.lang.Object
  com.cmpware.tools.AutoModelVLIW.Field

Enclosing class:

AutoModelVLIW

public static final class AutoModelVLIW.Field
extends java.lang.Object

This class defines an instruction field. The field is given the number of bits and the start of the field. It also may contain a list of symbols which may map to the values of the bits in this field.

Field Summary

int	bits The number of bits in the field
boolean	isDecode The decode field (used only in the assembler)
int	start The start bit fo the field
java.util.Hashtable	symbolNameLookup This looks up symbols by name
java.util.Hashtable	symbolValueLookup This looks up symbols by value
int	val A temporary place to store the value of the field

Constructor Summary

AutoModelVLIW.Field(int bits, int start)
Constructor

AutoModelVLIW.Field(int bits, int start, AutoModelVLIW.Symbol[] symbols)
Constructor

AutoModelVLIW.Field(int bits, int start, boolean isDecode)
Constructor

Method Summary

int	get(java.math.BigInteger instr) This method extracts the field data from an instruction.

Methods inherited from class java.lang.Object

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

Field Detail

bits

public int bits

The number of bits in the field

start

public int start

The start bit fo the field

isDecode

public boolean isDecode

The decode field (used only in the assembler)

val

public int val

A temporary place to store the value of the field

symbolNameLookup

public java.util.Hashtable symbolNameLookup

This looks up symbols by name

symbolValueLookup

public java.util.Hashtable symbolValueLookup

This looks up symbols by value

Constructor Detail

AutoModelVLIW.Field

public AutoModelVLIW.Field(int bits,
                           int start,
                           AutoModelVLIW.Symbol[] symbols)

Constructor

Parameters:

bits - The number of bits in the field

start - The start bit of the field

symbols - a symbol table associated with this field.

AutoModelVLIW.Field

public AutoModelVLIW.Field(int bits,
                           int start)

Constructor

Parameters:

bits - The number of bits in the field

start - The start bit of the field

AutoModelVLIW.Field

public AutoModelVLIW.Field(int bits,
                           int start,
                           boolean isDecode)

Constructor

Parameters:

bits - The number of bits in the field

start - The start bit of the field

isDecode - True if this is a decode field. This is used by the assembler and disassembler to ignore the decode fields. This could also be used to tag any fields which the assembler and disassembler should ignore.

Method Detail

get

public int get(java.math.BigInteger instr)

This method extracts the field data from an instruction.

Parameters:

instr - The instruction containing the field.

Returns:

This method returns the field data extracted from an instruction.