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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
*
*/
#include <stdlib.h>
#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 zmulma(doubleComplex *in1, int lines1, int columns1,
doubleComplex *in2, int lines2, int columns2,
doubleComplex *out)
{
#ifndef WITHOUT_BLAS
/*
** USES BLAS DGEMM FUNCTION.
*/
int i = 0;
double One = 1;
double MinusOne = -1;
double Zero = 0;
double *in1Real = (double*)malloc((unsigned int) lines1 * (unsigned int) columns1 * sizeof(double));
double *in1Imag = (double*)malloc((unsigned int) lines1 * (unsigned int) columns1 * sizeof(double));
double *in2Real = (double*)malloc((unsigned int) lines2 * (unsigned int) columns2 * sizeof(double));
double *in2Imag = (double*)malloc((unsigned int) lines2 * (unsigned int) columns2 * sizeof(double));
double *RealOut = (double*)malloc((unsigned int) lines1 * (unsigned int) columns2 * sizeof(double));
double *ImagOut = (double*)malloc((unsigned int) lines1 * (unsigned int) columns2 * sizeof(double));
zreala(in1, lines1 * columns1, in1Real);
zreala(in2, lines2 * columns2, in2Real);
zimaga(in1, lines1 * columns1, in1Imag);
zimaga(in2, lines2 * columns2, in2Imag);
/* Cr <- 1*Ar*Br + 0*Cr */
dgemm_("N","N", &lines1, &columns2, &columns1, &One,
in1Real, &lines1, in2Real, &lines2, &Zero, RealOut, &lines1);
/* Cr <- -1*Ai*Bi + 1*Cr */
dgemm_("N","N", &lines1, &columns2, &columns1, &MinusOne,
in1Imag, &lines1, in2Imag, &lines2, &One, RealOut, &lines1);
/* Ci <- 1*Ar*Bi + 0*Ci */
dgemm_("N","N", &lines1, &columns2, &columns1, &One,
in1Real, &lines1, in2Imag, &lines2, &Zero, ImagOut, &lines1);
/* Ci <- 1*Ai*Br + 1*Ci */
dgemm_("N","N", &lines1, &columns2, &columns1, &One,
in1Imag, &lines1, in2Real, &lines2, &One, ImagOut, &lines1);
/* Now fill output matrix */
for(i = 0 ; i < lines1 * columns2 ; ++i)
{
out[i] = DoubleComplex(RealOut[i], ImagOut[i]);
}
/* FREE allocated variguru_dim_structables */
free(in1Real);
free(in2Real);
free(in1Imag);
free(in2Imag);
free(RealOut);
free(ImagOut);
#else
/*
** DO NOT USE ANY BLAS FUNCTION.
*/
int i = 0;
int k = 0;
doubleComplex accu = DoubleComplex(0, 0);
for (i = 0 ; i < lines1 * columns2 ; ++i)
{
accu = DoubleComplex(0,0);
for (k = 0; k < columns1 ; ++k)
{
accu = zadds(accu,
zmuls(in1[i % lines1 + k *lines1] ,
in2[k + (i / lines1) *lines2] ));
}
out[i] = accu;
}
#endif
}
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