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/*
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) 2008-2008 - INRIA - Bruno JOFRET
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
*/
#ifndef WITHOUT_BLAS
#include "lapack.h"
#endif
#include "matrixMultiplication.h"
/*
** \brief Compute a multiplication for doubles matrixes.
** \param in1 : input matrix.
** \param lines1 : lines of in1 matrix.
** \param columns1 : columns of in1 matrix.
** \param in2 : input arry.
** \param lines2 : lines of in2 matrix.
** \param columns2 : columns of in2 matrix.
** \param out : Matrix that contains the multiplication in1 * in2.
*/
void dmulma(double *in1, int lines1, int columns1,
double *in2, int lines2, int columns2,
double *out)
{
#ifndef WITHOUT_BLAS
/*
** USES BLAS DGEMM FUNCTION.
*/
double One = 1;
double Zero = 0;
/* Cr <- 1*Ar*Br + 0*Cr */
dgemm_("N","N", &lines1, &columns2, &columns1, &One,
in1 , &lines1, in2, &lines2, &Zero, out, &lines1);
#else
/*
** DO NOT USE ANY BLAS FUNCTION.
*/
int i = 0;
int k = 0;
double accu = 0;
/*
** How to convert 2 index matrixes to one.
** #define in1(a, b) in1[a+b*lines1]
** #define in2(c, d) in2[c+d*lines2]
*/
for (i = 0 ; i < lines1 * columns2 ; ++i)
{
accu = 0;
for (k = 0; k < columns1 ; ++k)
{
accu += in1[i % lines1 + k * lines1]
* in2[k + (i / lines1) * lines2];
}
out[i] = accu;
}
#endif
}
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