------------------------------------------------------------------------------
--
-- This package was developed by CAD Language Systems, Inc. as part of an
-- effort to define a basis for portable VHDL models.  It has been submitted
-- to the VHDL Design Exchange Group (VDEG) to be considered as the basis for
-- a set of industry-wide, portable modeling conventions.
--
-- This package defines a set of timing selector functions that can be
-- supported on many simulators.
--
-- HISTORY:
--	11-MAY-89 PJM	Updated to reflect May 9-10 VDEG consensus.
--	22-APR-89 SSS	Created.
--
------------------------------------------------------------------------------


library VDEG_Portable;
package Timing is

 -- An enumeration type defining the selection criterion:
    type Regime is (Min, Nom, Max);

 -- Return Vmin, Vnom, or Vmax depending on some selection criterion:
    function MNM (Vmin, Vnom, Vmax: Time; Which: Regime) return Time;

 -- Return Vmin or Vmax depending on some selection criterion:
    function MM  (Vmin, Vmax: Time; Which: Regime) return Time;

 -- Return Vmin or Vnom depending on some selection criterion:
    function MN  (Vmin, Vnom: Time; Which: Regime) return Time;

 -- Return Vnom or Vmax depending on some selection criterion:
    function NM  (Vnom, Vmax: Time; Which: Regime) return Time;

end Timing;