bitser.primatives.slice
Class SubtractorSlice

java.lang.Object
  |
  +--com.xilinx.JBits.CoreTemplate.RTPCore
        |
        +--bitser.primatives.slice.SubtractorSlice

public class SubtractorSlice
extends com.xilinx.JBits.CoreTemplate.RTPCore

Implements a subtraction for two LSB (Least Significant Bit) first, signed, serial data inputs within a ser-by-parallel CSD coded multiplier.

The control signal must be asserted HI during the LSB to ensure proper reseting of the core for the next data word.

Copyright (c) 2002 by Alex Carreira

Version:
3.0 Debugged and Verified
Author:
Alex Carreira
See Also:
Serialized Form

Constructor Summary
SubtractorSlice(java.lang.String instanceName, com.xilinx.JBits.CoreTemplate.Net clk, com.xilinx.JBits.CoreTemplate.Net control, com.xilinx.JBits.CoreTemplate.Net _DataIn, com.xilinx.JBits.CoreTemplate.Net _SampleIn, com.xilinx.JBits.CoreTemplate.Net difOut)
          Creates an instance of a SubtractorSlice.
 
Method Summary
static int calcHeight()
          Compute and return the height of a SubtractorSlice core.
static int calcHeightGran()
          Compute and return the vertical granularity of a SubtractorSlice core.
static int calcWidth()
          Compute and return the width of a SubtractorSlice core.
static int calcWidthGran()
          Compute and return the horizontal granularity of a SubtractorSlice core.
 void connect()
          Connect the internal nets of the core.
static int getCtrlFO()
           
static int getSerDataFO()
           
 void implement()
          Implement this SubtractorSlice instance.
 
Methods inherited from class com.xilinx.JBits.CoreTemplate.RTPCore
addChild, addChild, addFixedResource, calcAbsoluteOffset, getChild, getFixedResource, getHeight, getHeight, getHeightGran, getHierName, getName, getParent, getPort, getPort, getRelativeOffset, getTag, getWidth, getWidth, getWidthGran, isProtected, newBus, newBus, newInputPort, newInputPort, newNet, newNet, newNet, newNoConnectBus, newOutputPort, newOutputPort, newPort, newPort, numChildren, numFixedResources, numPorts, removeDescendants, toString
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

SubtractorSlice

public SubtractorSlice(java.lang.String instanceName,
                       com.xilinx.JBits.CoreTemplate.Net clk,
                       com.xilinx.JBits.CoreTemplate.Net control,
                       com.xilinx.JBits.CoreTemplate.Net _DataIn,
                       com.xilinx.JBits.CoreTemplate.Net _SampleIn,
                       com.xilinx.JBits.CoreTemplate.Net difOut)
                throws com.xilinx.JBits.CoreTemplate.CoreException
Creates an instance of a SubtractorSlice.
Parameters:
instanceName - The name assigned to this SubtractorSlice instance.
clk - The external net to be connected to the clock port.
control - The external net to be connected to the control port.
DataIn - The external net to be connected to the A in port.
SampleIn - The external net to be connected to the B in port.
difOut - The external net to be connected to the dif out port. (Is DataIn - SampleIn).
Throws:
Throws - a CoreException when things go wrong.
Method Detail

calcHeightGran

public static int calcHeightGran()
Compute and return the vertical granularity of a SubtractorSlice core.

calcWidthGran

public static int calcWidthGran()
Compute and return the horizontal granularity of a SubtractorSlice core.

calcHeight

public static int calcHeight()
Compute and return the height of a SubtractorSlice core.

calcWidth

public static int calcWidth()
Compute and return the width of a SubtractorSlice core.

getSerDataFO

public static int getSerDataFO()
Returns:
The fan-out that this core imposes on the serial data input net.

getCtrlFO

public static int getCtrlFO()
Returns:
The fan-out that this core imposes on the control input net.

implement

public final void implement()
                     throws com.xilinx.JBits.CoreTemplate.CoreException
Implement this SubtractorSlice instance. WARNING: You must call the connect() method of this core or internal nets will remain unconnected.
Throws:
com.xilinx.JBits.CoreTemplate.CoreException - is thrown for error occurences.

connect

public void connect()
             throws com.xilinx.JBits.CoreTemplate.CoreException
Connect the internal nets of the core. This separate method allows the routing to be prioritized.
Throws:
com.xilinx.JBits.CoreTemplate.CoreException - is thrown for error occurences.