/*********************************************************************
*
*  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 21:05:28 $     */
/* $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 flag means GMP is compiled using 32-bit ints
#  define INT32		1
#else
#  define BITSPERWORD	32
#endif

/* The number of usable bits in the mantissa of a double
 * (Look in the file /usr/include/float.h)
 * Also define a fudge factor so that for any values of rem and div:
 *    floor(rem/div) > int(float(rem-DIVFUDGE*2^stuff)/float(div))
 *    where float(x) is the double precision representation
 *    of the top DBL_MANT_DIG-1 bits of x and stuff is chosen so
 *    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 "\\"