Package mars.mips.hardware

Class Register

java.lang.Object

java.util.Observable

mars.mips.hardware.Register

public class Register
extends Observable

Abstraction to represent a register of a MIPS Assembler.

Version:

June 2003

Author:

Jason Bumgarner, Jason Shrewsbury, Ben Sherman

Constructor Summary

Constructors

Constructor	Description
Register(String n, int num, int val)	Creates a new register with specified name, number, and value.

Method Summary

Modifier and Type	Method	Description
void	changeResetValue(int reset)	Change the register's reset value; the value to which it will be set when resetValue() is called.
String	getName()	Returns the name of the Register.
int	getNumber()	Returns the number of the Register.
int	getResetValue()	Returns the reset value of the Register.
int	getValue()	Returns the value of the Register.
int	getValueNoNotify()	Returns the value of the Register.
void	resetValue()	Resets the value of the register to the value it was constructed with.
int	setValue(int val)	Sets the value of the register to the val passed to it.

Methods inherited from class java.util.Observable

addObserver, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers

Methods inherited from class java.lang.Object

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

Constructor Details

Register

public Register(String n,
 int num,
 int val)

Creates a new register with specified name, number, and value.

Parameters:

n - The name of the register.

num - The number of the register.

val - The initial (and reset) value of the register.

Method Details

getName

public String getName()

Returns the name of the Register.

Returns:

The name of the Register.

getValue

public int getValue()

Returns the value of the Register. Observers are notified of the READ operation.

Returns:

The value of the Register.

getValueNoNotify

public int getValueNoNotify()

Returns the value of the Register. Observers are not notified.

Returns:

The value of the Register.

getResetValue

public int getResetValue()

Returns the reset value of the Register.

Returns:

The reset (initial) value of the Register.

getNumber

public int getNumber()

Returns the number of the Register.

Returns:

The number of the Register.

setValue

public int setValue(int val)

Sets the value of the register to the val passed to it. Observers are notified of the WRITE operation.

Parameters:

val - Value to set the Register to.

Returns:

previous value of register

resetValue

public void resetValue()

Resets the value of the register to the value it was constructed with. Observers are not notified.

changeResetValue

public void changeResetValue(int reset)

Change the register's reset value; the value to which it will be set when resetValue() is called.