Initial commit of OpenSPARC T2 design and verification files.

[OpenSPARC-T2-DV] / verif / env / fnx / vlib / CTSupportClasses / src / CTRange.vr

// ========== Copyright Header Begin ==========================================
// 
// OpenSPARC T2 Processor File: CTRange.vr
// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
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#include "CTSupportClassDefines.vri"
//This class defines an object that will return a random number when
//the Select method is called. This number will be between
//the Min and Mix values (inclusive) assigned at instantiation time.
//Example:
//
//          integer DriveDelayMin = DEFAULT_MIN_DELAY;
//          integer DriveDelayMax = DEFAULT_MAX_DELAY;
//          Range   DriveDelay = new(DriveDelayMin, DriveDelayMax);
//                     ...
//          integer FinalDriveDelay
//                     ...
//                     ...
//
//          //Each time through, data can completely random, but
//          //drive delay can only vary within a limited range.
//          repeat (n) {
//             Data = random();
//             FinalDriveDelay    = DriveDelay.Select();
//             Drive(Data, FinalDriveDelay);
//                     ...


class Range {

  local integer Minimum;
  local integer Maximum;

  task new (integer Min = 0, integer Max = CT_MAXINT)
    {
      if (Max < Min) {
	//Select exactly Min
	Minimum = Min;
	Maximum = Min;
      }
      else {
	Minimum = Min;
	Maximum = Max;
      }
    }

  function integer Select ()
  {
    Select = (random() % (Maximum-Minimum+1)) + Minimum;
  }
}