*
* $Id: rndm.F,v 1.3 1997/10/23 16:37:04 mclareni Exp $
*
* $Log: rndm.F,v $
* Revision 1.3  1997/10/23 16:37:04  mclareni
* NT mods
*
* Revision 1.2  1997/02/04 17:36:24  mclareni
* Merge Winnt and 97a versions
*
* Revision 1.1.1.1.2.1  1997/01/21 11:31:40  mclareni
* All mods for Winnt 96a on winnt branch
*
* Revision 1.1.1.1  1996/02/15 17:50:13  mclareni
* Kernlib
*
*
#include "kerngen/pilot.h"
#if defined(CERNLIB_MSSTDCALL)&&defined(CERNLIB_WINNT)
#include "wntgs/rndm.F"
#elif defined(CERNLIB_QMDOS)
#include "dosgs/rndm.F"
#elif defined(CERNLIB_QMMPW)
#include "mpwgs/rndm.F"
#elif defined(CERNLIB_QMVAOS)||defined(CERNLIB_QMVMI)
#include "allgs/rndm.F"
#elif defined(CERNLIB_QMLNX)
#include "lnxgs/rndm.F"
#elif defined(CERNLIB_QMIRTD)
#include "irtdgs/rndm.F"
#elif defined(CERNLIB_QMSUN)
#include "sungs/rndm.F"
#elif defined(CERNLIB_QMVAX)
#include "vaxgs/rndm.F"
#elif (defined(CERNLIB_B32))&&(defined(CERNLIB_QIEEE))
      FUNCTION RNDM (ISEED)
C
C CERN PROGLIB# V104    RNDM            .VERSION KERNFOR  4.23  891215
C ORIG. 22-MAR-88 from IBM version of G.Marsaglia et al., Montreal
C
C     !!!   Version valid only for 32 bit machines   !!!
C     !!!   with IEEE floating point representation  !!!
C
C-    Uniform Random Number Generator,
C-    giving the same sequence as the IBM and VAX version

      EQUIVALENCE (AMAN,MANT)
      PARAMETER    (MSK1 = 201326592)
      PARAMETER    (MSK2 = 855638016)
C     PARAMETER    (MSK1 = '0C000000'X)
C     PARAMETER    (MSK2 = '33000000'X)
      SAVE  MCGN
      DATA  MCGN  /12345/

#if !defined(CERNLIB_QISASTD)
#include "kerngen/q_andor.inc"
#include "kerngen/q_shift.inc"
* Ignoring t=pass
#endif

      MCGN = MCGN * 69069
#if defined(CERNLIB_QISASTD)
      MANT = ISHFT (MCGN,-8)
#endif
#if !defined(CERNLIB_QISASTD)
      MANT = ISHFTR(MCGN, 8)
#endif
      IF (MANT.EQ.0)         GO TO 14
      AMAN = MANT
C-    AMAN in the range 1 to 2**24-1
      MANT = MANT - MSK1
C-    multiply by 2.**(-24)
      RNDM = AMAN
      RETURN

C--   for zero set RNDM = 2.**(-25)
   14 MANT = MSK2
      RNDM = AMAN
      RETURN

C--       Integer random number
      ENTRY IRNDM (ISEED)
      MCGN  = MCGN * 69069
#if defined(CERNLIB_QISASTD)
      IRNDM = ISHFT (MCGN,-1)
#endif
#if !defined(CERNLIB_QISASTD)
      IRNDM = ISHFTR(MCGN, 1)
#endif
      RETURN

C--       Set the seed
      ENTRY RDMIN (ISEED)
      MCGN = ISEED
      RETURN

C--       Get the seed
      ENTRY RDMOUT (ISEED)
      ISEED = MCGN
      END
#endif