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HPL_xjumpm(3)		     HPL Library Functions		 HPL_xjumpm(3)

NAME
       HPL_xjumpm - Compute constants to jump in the random sequence.

SYNOPSIS
       #include	"hpl.h"

       void  HPL_xjumpm( const int JUMPM, int *	MULT, int * IADD, int *	IRANN,
       int * IRANM, int	* IAM, int * ICM );

DESCRIPTION
       HPL_xjumpm computes  the	constants  A and C  to jump JUMPM  numbers  in
       the  random  sequence: X(n+JUMPM) = A*X(n)+C.  The constants encoded in
       MULT and	IADD  specify  how to jump from	one entry in the  sequence  to
       the next.

ARGUMENTS
       JUMPM   (local input)	       const int
	       On  entry,   JUMPM  specifies  the  number  of entries  in  the
	       sequence	to jump	over. When JUMPM is less or equal than zero, A
	       and  C are not computed,	IRANM is set to	IRANN corresponding to
	       a jump of size zero.

       MULT    (local input)	       int *
	       On entry, MULT is an array of dimension 2,  that	 contains  the
	       16-lower	  and  15-higher bits of the constant  a  to jump from
	       X(n) to X(n+1) =	a*X(n) + c in the random sequence.

       IADD    (local input)	       int *
	       On entry, IADD is an array of dimension 2,  that	 contains  the
	       16-lower	  and  15-higher bits of the constant  c  to jump from
	       X(n) to X(n+1) =	a*X(n) + c in the random sequence.

       IRANN   (local input)	       int *
	       On entry, IRANN is an array of dimension	2. that	 contains  the
	       16-lower	and 15-higher bits of the encoding of X(n).

       IRANM   (local output)	       int *
	       On  entry,   IRANM  is an array of dimension 2.	 On exit, this
	       array  contains respectively  the 16-lower and  15-higher  bits
	       of the encoding of X(n+JUMPM).

       IAM     (local output)	       int *
	       On  entry,  IAM is an array of dimension	2. On exit, when JUMPM
	       is  greater  than  zero,	 this  array  contains	 the   encoded
	       constant	  A   to jump from  X(n) to  X(n+JUMPM)	 in the	random
	       sequence. IAM(0:1)  contains  respectively  the	 16-lower  and
	       15-higher   bits	  of this constant  A. When  JUMPM  is less or
	       equal than zero,	this array is not referenced.

       ICM     (local output)	       int *
	       On entry, ICM is	an array of dimension 2. On exit,  when	 JUMPM
	       is   greater   than  zero,  this	 array	contains  the  encoded
	       constant	 C  to jump from  X(n)	to  X(n+JUMPM) in  the	random
	       sequence.  ICM(0:1)   contains  respectively  the  16-lower and
	       15-higher  bits	of this	constant  C. When  JUMPM  is  less  or
	       equal than zero,	this array is not referenced.

SEE ALSO
       HPL_ladd	(3),	 HPL_lmul (3),	   HPL_setran (3),     HPL_jumpit (3),
       HPL_rand	(3).

HPL 2.1			       October 26, 2012			 HPL_xjumpm(3)

NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | SEE ALSO

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