org.opencores.structure
Class NodeSPC

java.lang.Object
  |
  +--org.opencores.structure.Node
        |
        +--org.opencores.structure.IndexedNode
              |
              +--org.opencores.structure.NodeSPC

public class NodeSPC

extends IndexedNode

SPC, consisting of Conf.ADD_GROUP_SIZE full adders ports:

0 A0 1 B0

2 A1 3 B1

4 A2 5 B2

6 A3 7 B3

8 CIN 9 S0

10 S1 11 S2

12 S3 13 COUT

Field Summary

static int	CARRY_IN_PORT index of carry input port
static int	CARRY_OUT_PORT index of carry ouput port
NodeSPC	group first adder of the group
NodeSPC	next adder this one passes carry
static int	NINPUTS number of inputs, they must be listed first in ports
NodeSPC	prev adder this one receives carry

Fields inherited from class org.opencores.structure.IndexedNode

idx

Fields inherited from class org.opencores.structure.Node

dir, flag, fx, fy, INOUT, INPUT, link, name, nfx, nfy, OUTPUT, ports, temp, visited, weight, width, x, y

Constructor Summary

NodeSPC()
constructs new adder

NodeSPC(NodeAdd group, NetGlobal fillWith)
creates 4bit adder from four NodeAdds, looking at .next.

NodeSPC(NodeAdd a0, NodeAdd a1, NodeAdd a2, NodeAdd a3)
constructs new 4b adder from four full adders

Method Summary

java.lang.Object	clone() creates new (unlinked) node with same parameters.
void	duplicate(NodeAdd n) duplicates parameters from n to this
static int	indexOf(int x, int y) returns index in array, based on position in matrix
int	posX() Returns its x position.
static int	posX(int idx) returns SPCs x position.
int	posY() returns its y position
static int	posY(int idx) returns SPCs y position.
java.lang.String	toString()

Methods inherited from class org.opencores.structure.Node

duplicate, linkNets, setWidth, unlinkNets

Methods inherited from class java.lang.Object

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

Field Detail

NINPUTS

public static final int NINPUTS

number of inputs, they must be listed first in ports

CARRY_IN_PORT

public static final int CARRY_IN_PORT

index of carry input port

CARRY_OUT_PORT

public static final int CARRY_OUT_PORT

index of carry ouput port

prev

public NodeSPC prev

adder this one receives carry

next

public NodeSPC next

adder this one passes carry

group

public NodeSPC group

first adder of the group

Constructor Detail

NodeSPC

public NodeSPC()

constructs new adder

NodeSPC

public NodeSPC(NodeAdd a0,
               NodeAdd a1,
               NodeAdd a2,
               NodeAdd a3)

constructs new 4b adder from four full adders

NodeSPC

public NodeSPC(NodeAdd group,
               NetGlobal fillWith)

creates 4bit adder from four NodeAdds, looking at .next. Some output ports can remain null.

Parameters:

group - lowest bit full adder

fillWith - this global net is linked with unused inputs

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class Node

clone

public java.lang.Object clone()

creates new (unlinked) node with same parameters.

Returns:

duplicated node

Overrides:

clone in class Node

duplicate

public void duplicate(NodeAdd n)

duplicates parameters from n to this

Parameters:

n - node to copy data from

posX

public static int posX(int idx)

returns SPCs x position.

Parameters:

idx - SPC index

Returns:

x position

posY

public static int posY(int idx)

returns SPCs y position.

Parameters:

idx - SPC index

Returns:

y position

posX

public int posX()

Returns its x position.

Returns:

x position

Overrides:

posX in class IndexedNode

posY

public int posY()

returns its y position

Returns:

y position

Overrides:

posY in class IndexedNode

indexOf

public static int indexOf(int x,
                          int y)

returns index in array, based on position in matrix

Parameters:

x - x position

y - y position

Returns:

array index