engine
Class ContBitSelect

java.lang.Object
  |
  +--engine.Expression
        |
        +--engine.WireSelection
              |
              +--engine.BitSelect
                    |
                    +--engine.ContBitSelect

class ContBitSelect

extends BitSelect

implements Executable

This is a BitSelect that continuously assings to its target. Unless BitSelect, it maintains the bits in an internal BitVector ( data ), and calls Wire's compute(), in order for it to determine its bits considering all its assignemens;

Field Summary

(package private) boolean	active
(package private) BitVector	data
(package private) BitVector	newB The computed data to be assigned to the target BitVector
(package private) byte[]	newStrengths The computed strengths to be assigned to target
(package private) byte[]	strengths
(package private) long	updateTime The timestamp of the last programmed update

Fields inherited from class engine.BitSelect

b, end, start, target

Fields inherited from class engine.Expression

length, ns

Constructor Summary

(package private)	ContBitSelect(NameSpace ns, BitVector b, GenericSelectorDescription target, byte strength)
(package private)	ContBitSelect(NameSpace ns, BitVector b, GenericSelectorDescription target, int start, int end) The implicit strength (strong1, strong0) is used here.
(package private)	ContBitSelect(NameSpace ns, BitVector b, GenericSelectorDescription target, int start, int end, byte strength)

Method Summary

(package private) void	breakSelection(WireSelection[] bits, int startIndex)
void	execute()
(package private) void	reatach()
(package private) void	release()
(package private) void	set(BitVector x, int start, int end) Called by @see assign with the appropriate parameters
void	setStrengths(byte[] s, int startIndex) First sets the strengths, and then calls the old assign.
byte	strength(int i)

Methods inherited from class engine.BitSelect

addMonitor, assign, assign, evaluate, getStrength, getStrengths, length, toString

Methods inherited from class engine.Expression

isLeftValue

Methods inherited from class java.lang.Object

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

Field Detail

data

BitVector data

strengths

byte[] strengths

updateTime

long updateTime

The timestamp of the last programmed update

active

boolean active

newB

BitVector newB

The computed data to be assigned to the target BitVector

newStrengths

byte[] newStrengths

The computed strengths to be assigned to target

Constructor Detail

ContBitSelect

ContBitSelect(NameSpace ns,
              BitVector b,
              GenericSelectorDescription target,
              int start,
              int end,
              byte strength)

ContBitSelect

ContBitSelect(NameSpace ns,
              BitVector b,
              GenericSelectorDescription target,
              int start,
              int end)

The implicit strength (strong1, strong0) is used here.

ContBitSelect

ContBitSelect(NameSpace ns,
              BitVector b,
              GenericSelectorDescription target,
              byte strength)

Method Detail

set

void set(BitVector x,
         int start,
         int end)
   throws InterpretTimeException

Called by @see assign with the appropriate parameters

Overrides:

set in class BitSelect

setStrengths

public void setStrengths(byte[] s,
                         int startIndex)

First sets the strengths, and then calls the old assign. This will cause the assigned wire to compute its value considering the new strengths

Overrides:

setStrengths in class BitSelect

execute

public void execute()
             throws InterpretTimeException,
                    SimulationStoppedException

Specified by:

execute in interface Executable

strength

public byte strength(int i)

Parameters:

i - the index in the ramge start..end

Returns:

the strength for the specified index

release

void release()

Overrides:

release in class BitSelect

See Also:

WireSelection.detach

reatach

void reatach()

Overrides:

reatach in class BitSelect

See Also:

WireSelection.reatach

breakSelection

void breakSelection(WireSelection[] bits,
                    int startIndex)

Overrides:

breakSelection in class BitSelect

See Also:

WireSelection.reatach