ISA
Class AbstractISA

java.lang.Object
  ISA.AbstractISA

Direct Known Subclasses:

ISA

public abstract class AbstractISA
extends java.lang.Object

Nested Class Summary

protected class	AbstractISA.CompoundField Compound field combines one or more other fields.
protected class	AbstractISA.ConstantField A field that is always assigned a constant value.
protected class	AbstractISA.DictonaryField For register names (etc.), field name comes from dictonary lookup.
protected static interface	AbstractISA.InsLayout Describes the in-memory layout of instructions.
protected class	AbstractISA.LabelableField Simple field whose value can be represted by a label.
protected class	AbstractISA.OpCodeField Instruction op code.
protected class	AbstractISA.PCRelativeField PC-relative address field.
protected class	AbstractISA.ScaledField For index addressing mode, this field is scaled by index scaling factor in instruction.
protected class	AbstractISA.ShiftField Shift value.
protected class	AbstractISA.ShiftInsField Shift instruction.
protected class	AbstractISA.ShiftOpCodeField
protected class	AbstractISA.SimpleField Simple instruction field.

Constructor Summary

AbstractISA(java.lang.String aName, AbstractAssembler anAssembler)

Method Summary

protected void	define(int opCode, AbstractISA.InsLayout layout) Called by subclass to define instructions that are part of its ISA.
java.lang.String	getName() Name of this ISA.
ISA.AbstractISA.InstructionDef	getPlaceholderInstructionDef()
BitString	getPlaceholderInstructionValue()
protected void	setPlaceholderInstruction(int opCode) Called by subclass to specify an instruction to use a a placehold (nop).

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractISA

public AbstractISA(java.lang.String aName,
                   AbstractAssembler anAssembler)

Method Detail

getName

public java.lang.String getName()

Name of this ISA.

define

protected void define(int opCode,
                      AbstractISA.InsLayout layout)

Called by subclass to define instructions that are part of its ISA.

Parameters:

opCode - opCode number for this instruction

layout - layout description describing how bits of instruction are to be interpreted

setPlaceholderInstruction

protected void setPlaceholderInstruction(int opCode)

Called by subclass to specify an instruction to use a a placehold (nop).

getPlaceholderInstructionDef

public ISA.AbstractISA.InstructionDef getPlaceholderInstructionDef()

getPlaceholderInstructionValue

public BitString getPlaceholderInstructionValue()