byucc.jhdl.DRC.Rules
Class IBufsAndOBufs

java.lang.Object
  byucc.jhdl.DRC.DesignRule
      byucc.jhdl.DRC.Rules.IBufsAndOBufs

All Implemented Interfaces:

DesignRuleConstants

Direct Known Subclasses:

IBufsAndOBufsVirtex, IBufsAndOBufsXC4000

public abstract class IBufsAndOBufs

extends DesignRule

This class implements a DesignRule for the Xilinx libraries. It checks all ibufs (and their variants) to make sure that they are driven only by ipads or nothing at all. It also checks all obufs to make sure that they drive only opads or nothing at all.

Author:

Anthony L. Slade

Field Summary

protected CellList	ibufList Will hold a list of cells of the ibuf type
protected CellList	obufList Will hold a list of cells of the obuf type
protected Cell	topCell The top-level Cell being checked

Fields inherited from class byucc.jhdl.DRC.DesignRule

cellList, checker, checkOk, description, enabled, failureReport, name, oneLineDescription, violatingCells

Fields inherited from interface byucc.jhdl.DRC.DesignRuleConstants

MSGHEADER_ERROR, MSGHEADER_NOTICE, MSGHEADER_STATUS, MSGHEADER_WARNING, MSGTYPE_ERR_ALL, MSGTYPE_ERR_EXPERTWARN, MSGTYPE_ERR_NOEXPERT, MSGTYPE_ERROR_BITS, MSGTYPE_MUTE, MSGTYPE_NOTICE, MSGTYPE_NOTICE_BITS, MSGTYPE_NOTICE_NOEXPERT, MSGTYPE_STATUS, MSGTYPE_STATUS_BITS, MSGTYPE_STATUS_NOEXPERT, MSGTYPE_WARN_ALL, MSGTYPE_WARN_NOEXPERT, MSGTYPE_WARNING_BITS, SHOW_NUM_RULES_CHECKED_EVERY

Constructor Summary

IBufsAndOBufs()

Method Summary

protected boolean	checkPadCell(Cell cl)
protected boolean	doCheck() Initiates the design rule check on topCell.
protected abstract boolean	isIBuf(Cell cl) Returns true if cl is an instance of an ibuf-type cell.
protected abstract boolean	isIOPad(Cell cell)
protected abstract boolean	isIPad_sim(Cell cell)
protected abstract boolean	isIPad(Cell cell)
protected abstract boolean	isOBuf(Cell cl) Returns true if cl is an instance of an obuf-type cell.
protected abstract boolean	isOPad_sim(Cell cell)
protected abstract boolean	isOPad(Cell cell)
protected void	sortCell(Cell cl) Sorts Cells according to type.

Methods inherited from class byucc.jhdl.DRC.DesignRule

addToCellList, addToCellList, addViolatingCell, checkOk, displayMsgHeader, getDescription, getDesignRuleChecker, getName, getOneLineDescription, getReport, getViolatingCells, msg, msg, msg, msg, msgln, msgln, registerViolation, resetState, setCurrentMsgType, setDesignRuleCheckerReference, setName, setReport, toString

Methods inherited from class java.lang.Object

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

Field Detail

obufList

protected CellList obufList

Will hold a list of cells of the obuf type

ibufList

protected CellList ibufList

Will hold a list of cells of the ibuf type

topCell

protected Cell topCell

The top-level Cell being checked

Constructor Detail

IBufsAndOBufs

public IBufsAndOBufs()

Method Detail

doCheck

protected boolean doCheck()

Initiates the design rule check on topCell.

Specified by:

doCheck in class DesignRule

Returns:

true if the design rules checked are kept, otherwise false.

sortCell

protected void sortCell(Cell cl)

Sorts Cells according to type. ibufs and obufs go into respective lists. This method is called by the DesignRuleChecker for each descendant of the top-level cell. This sorting is done right before the doCheck method is called.

Specified by:

sortCell in class DesignRule

Parameters:

cl - Cell to be sorted

isOBuf

protected abstract boolean isOBuf(Cell cl)

Returns true if cl is an instance of an obuf-type cell.

Parameters:

cl - Cell to check its class to see if is an obuf type

Returns:

true if cl is an obuf-type cell, otherwise false

isIBuf

protected abstract boolean isIBuf(Cell cl)

Returns true if cl is an instance of an ibuf-type cell.

Parameters:

cl - Cell to check its class to see if is an ibuf type

Returns:

true if cl is an ibuf-type cell, otherwise false

isOPad

protected abstract boolean isOPad(Cell cell)

isOPad_sim

protected abstract boolean isOPad_sim(Cell cell)

isIOPad

protected abstract boolean isIOPad(Cell cell)

isIPad

protected abstract boolean isIPad(Cell cell)

isIPad_sim

protected abstract boolean isIPad_sim(Cell cell)

checkPadCell

protected boolean checkPadCell(Cell cl)