common.c File Reference

#include "snoopy.h"
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "error.h"
#include "gfft.h"
#include "debug.h"

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Functions
void	allocate_field (struct Field *fldi)
void	deallocate_field (struct Field *fldi)
void	init_N2_profile ()
void	init_real_mask ()
void	init_common (void)
void	finish_common (void)
double	randm (void)
double	randm_normal (void)
void	projector (double complex qx[], double complex qy[], double complex qz[])
double	energy (const double complex q[])
double	get_c_time (void)
void	reduce (double *var, const int op)
float	big_endian (float in_number)
void	c_nan (double xi, const char ErrorRoutine[], const int line, const char Filename[])
Variables
double *	kx
double *	ky
double *	kz
double *	kxt
double *	k2t
double *	ik2t
double	kxmax
double	kymax
double	kzmax
double	kmax
double *	mask
double *	wr1
double *	wr2
double *	wr3
double *	wr4
double *	wr5
double *	wr6
double *	wr7
double *	wr8
double *	wr9
double *	wr10
double *	wr11
double *	wr12
double *	wr13
double *	wr14
double *	wr15
double complex *	w1
double complex *	w2
double complex *	w3
double complex *	w4
double complex *	w5
double complex *	w6
double complex *	w7
double complex *	w8
double complex *	w9
double complex *	w10
double complex *	w11
double complex *	w12
double complex *	w13
double complex *	w14
double complex *	w15
struct Parameters	param
double	nu
int	rank
int	nthreads

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Function Documentation

void allocate_field

(

struct Field *

fldi

)

Allocate a field structure according to the code current configuration This routine allows one to add extra fields to the code very easily.

Parameters:

*fldi,:

pointer to a field structure to initialize

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float big_endian

(

float

in_number

)

Determines if the machine is little-endian. If so, it will force the data to be big-endian.

Parameters:

in_number

floating point number to be converted in big endian

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void c_nan	(	double	xi,
		const char	ErrorRoutine[],
		const int	line,
		const char	Filename[]
	)

Test a double for Not a Number error

Parameters:

xi	double to be checked

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void deallocate_field

(

struct Field *

fldi

)

Deallocate a field structure created by allocate_field

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double energy

(

const double complex

q[]

)

Compute the energy of a given field.

Parameters:

q	complex array containing the field for which we want the total energy

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void finish_common

(

void

)

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double get_c_time

(

void

)

Return the localtime in seconds. Use different implementation depending on the avaiable libraries

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void init_common

(

void

)

Init all global variables, aligning them in memory

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void init_N2_profile

(

)

void init_real_mask

(

)

void projector	(	double complex	qx[],
		double complex	qy[],
		double complex	qz[]
	)

Remove the divergence from a 3D field using the projector operator: q=q-k.q/k^2

Parameters:

qx,:	x component of the field
qy,:	y component of the field
qz,:	z component of the field

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double randm

(

void

)

Customized random number generator Allow one to have consistant random numbers generators on different architectures.

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double randm_normal

(

void

)

Normal distribution Algorithm by D.E. Knut, 1997, The Art of Computer Programmin, Addison-Wesley.

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void reduce	(	double *	var,
		const int	op
	)

Reduce a variable over all the avaiable processes Can add a value on all the process, find a maximum or a minimum.

NOTE: This routine makes sense only when MPI_SUPPORT is set. If not, this routine does nothing.

Parameters:

*var,:	variable to be reduced
op,:	operation needed to be done. Can be set to: 1= Sum over all the processes 2= Find the maximum over all the processes 3= Find the minimum over all the processes

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Variable Documentation

double* ik2t

inverse of k2t Wavevector, function of time when SHEAR is present. set to 0 wheh k2t=0 to avoid singularity

double* k2t

k squared Wavevector, function of time when SHEAR is present.

double kmax

Maximum wavevectors

double* kx

x Wavevector

double kxmax

double* kxt

Time dependant x Wavevector. Different from kx only when SHEAR is present.

double* ky

y Wavevector

double kymax

double* kz

z Wavevector

double kzmax

double* mask

Deasliasing Mask

int nthreads

Number of OpenMP threads

double nu

struct Parameters param

int rank

double complex* w1

double complex* w10

double complex * w11

double complex * w12

double complex* w13

double complex * w14

double complex * w15

double complex * w2

double complex * w3

Temporary complex array (alias of real wr**)

double complex* w4

double complex * w5

double complex * w6

Temporary complex array (alias of real wr**)

double complex* w7

double complex * w8

double complex * w9

Temporary complex array (alias of real wr**)

double* wr1

double* wr10

Temporary real array (alias of complex w**)

double * wr11

double * wr12

double* wr13

double * wr14

double * wr15

double * wr2

double * wr3

double* wr4

Temporary real array (alias of complex w**)

double * wr5

double * wr6

double* wr7

Temporary real array (alias of complex w**)

double * wr8

double * wr9