/*********************************************************************
*
*  File Name: decalpha.h
*
*  Functional Description: The header file decalpha.h defines macros
*      used by FORTRAN code on DEC AlphaClusters when implementing
*      the bench11 multiple precision benchmark routines.
*
*********************************************************************/
/* CVS info   */
/* $Date: 2005/01/10 21:17:58 $     */
/* $Revision: 1.2 $ */
/* $RCSfile: decalpha.h,v $  */
/* $Name: rel_5 $     */

/*On the DEC Alpha the long (64 bit) is the largest supported type */
#define mplong		long
#define MPLONG		INTEGER(KIND=8)

/*The total number of bits in an MPLONG */
#define WORDLEN		64

/* This is for MPI transfers in P11, C11, R11 */
#define intspermplong	2
 
/*The number of bits in each digit word used by the multiple */
/*precision structure (normally WORDLEN/2) */
#ifdef GMP
# define BITSPERWORD	64
  /* this means GMP was compiled using 32-bit ints on DEC */
# define INT32		1
#else
# define BITSPERWORD	32
#endif

/*********************************************************************
C  The number of usable bits in the mantissa of a double
C  (Look in the file /usr/include/float.h)
C  Also define a fudge factor so that, for any values of rem and div,
C     floor(rem/div) > int(float(rem-DIVFUDGE*2^stuff)/float(div))
C     where float(x) is the double precision representation
C     of the top DBL_MANT_DIG-1 bits of x and stuff is chosen so
C     DIVFUDGE effects only the bottom bits of those chosen by float.
*********************************************************************/
#define DBL_MANT_DIG	53
#define DIVFUDGE	3

/*********************************************************************
C  There are 32 bits in an INTEGER on the DEC Alpha using the default flags.
C  This is important because many functions return an INTEGER, not an MPLONG.
C  Note that the "-integer_size 64" or the "-i8" compiler options will
C  force integers to be 64 bits.
*********************************************************************/
#define INTEGER_BITS	32

#define VECTLEN		1

/* Define a string containing a single backslash */
#define BACKSLASH "\\"