/* * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab * Copyright (C) 2008 - INRIA - Arnaud TORSET * * 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_LAPACK #include "lapack.h" #else #include "multiplication.h" #include "division.h" #include "subtraction.h" #include "sqrt.h" #endif #include "chol.h" #include <malloc.h> #include <stdio.h> void cchola(floatComplex * in, int size, floatComplex *out){ /* param in : input matrix (square matrix) param size : number of rows or columns param out : output upper triangular matrix */ /* We compute U as A=Ut*U */ #ifndef WITHOUT_LAPACK /*We have to use a double, copy of in, cause dpotrf works only with double, not with float*/ doubleComplex* tmp; int i=0, j=0, info=0; tmp=malloc((unsigned int)(size*size)*sizeof(doubleComplex)); for(i=0;i<size*size;i++) tmp[i]=DoubleComplex((double)creals(in[i]),(double)cimags(in[i])); C2F(zpotrf)("U", &size, tmp, &size, &info,1L); for(i=0;i<size*size;i++) out[i]=FloatComplex((float)zreals(tmp[i]),(float)zimags(tmp[i])); /*Zeros in the lower triangular part*/ for (i=0;i<size;i++){ for (j=i+1;j<size;j++){ out[j+i*size]=FloatComplex(0,0); } } #else /* Do not use Lapack functions*/ int i=0, j=0, k=0; floatComplex tmp,transposee; float accu; for (i=0;i<size*size;i++) out[i]=FloatComplex(0,0); /* Voir si on peut l'enlever */ for (i=0;i<size;i++){ accu=0.0f; for (j=0;j<i;j++){ tmp=in[i*size+j]; for (k=0;k<j;k++){ transposee=FloatComplex(creals(out[j*size+k]),-cimags(out[j*size+k])); tmp = cdiffs(tmp,cmuls(out[i*size+k],transposee)); } out[i*size+j]= crdivs(tmp,out[j*size+j]); accu += creals(out[i*size+j])*creals(out[i*size+j]); accu += cimags(out[i*size+j])*cimags(out[i*size+j]); } tmp = FloatComplex(creals(in[i*size+i])-accu,0); out[i*size+i]=csqrts(tmp); } #endif }