884c5ab027
this is required for consistency amongst the compile units which are linked into the same library and seems to be forgotten quite frequently.
145 lines
3.9 KiB
C++
145 lines
3.9 KiB
C++
/*
|
|
Copyright 2012 SINTEF ICT, Applied Mathematics.
|
|
|
|
This file is part of the Open Porous Media project (OPM).
|
|
|
|
OPM is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
OPM is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with OPM. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <opm/core/linalg/blas_lapack.h>
|
|
#include <iostream>
|
|
#include <vector>
|
|
|
|
namespace {
|
|
struct BandMatrixCoeff
|
|
{
|
|
BandMatrixCoeff(MAT_SIZE_T N, MAT_SIZE_T ku, MAT_SIZE_T kl)
|
|
: ku_(ku), kl_(kl), nrow_(2 * kl + ku + 1), N_(N)
|
|
{
|
|
}
|
|
|
|
|
|
// compute the position where to store the coefficient of a matrix A_{i,j} (i,j=0,...,N-1)
|
|
// in a array which is sent to the band matrix solver of LAPACK.
|
|
|
|
int operator ()(MAT_SIZE_T i, MAT_SIZE_T j) {
|
|
return kl_ + ku_ + i - j + j*nrow_;
|
|
}
|
|
|
|
const MAT_SIZE_T ku_;
|
|
const MAT_SIZE_T kl_;
|
|
const MAT_SIZE_T nrow_;
|
|
const MAT_SIZE_T N_;
|
|
};
|
|
} //end anonymous namespace
|
|
|
|
int main()
|
|
{
|
|
const MAT_SIZE_T N = 5;
|
|
const MAT_SIZE_T nrhs = 1;
|
|
double DU[N-1] = { 2.1, -1.0, 1.9, 8.0 };
|
|
double D[N] = { 3.0, 2.3, -5.0, -0.9, 7.1 };
|
|
double DL[N-1] = { 3.4, 3.6, 7.0, -6.0 };
|
|
double B[N] = { 2.7, -0.5, 2.6, 0.6, 2.7 };
|
|
// double B[N] = { 2.7, -0.5, 2.6, 0.6, 2.7 };
|
|
MAT_SIZE_T info = 0;
|
|
dgtsv_(&N, &nrhs, DL, D, DU, B, &N, &info);
|
|
if (info == 0) {
|
|
for (int i = 0; i < N; ++i) {
|
|
std::cout << B[i] << ' ';
|
|
}
|
|
std::cout << std::endl;
|
|
} else {
|
|
std::cerr << "Something went wrong in dgtsv_()\n";
|
|
}
|
|
std::cout << std::endl;
|
|
|
|
//test of dgbsv_
|
|
MAT_SIZE_T ldb = N;
|
|
MAT_SIZE_T lda = N;
|
|
std::vector<MAT_SIZE_T> ipiv(N, 0);
|
|
std::vector<double> AA(N*N, 0.);
|
|
std::vector<double> BB(N, 0.);
|
|
for (MAT_SIZE_T i = 0; i < N; ++i) {
|
|
AA[i + i*N] = 10.;
|
|
if (i > 0) {
|
|
AA[i + (i - 1)*N] = i;
|
|
AA[i - 1 + i*N] = N - i;
|
|
}
|
|
BB[i] = i;
|
|
}
|
|
|
|
for (MAT_SIZE_T i = 0; i < N; ++i) {
|
|
for (MAT_SIZE_T j = 0; j < N; ++j) {
|
|
std::cout << " " << AA[i + j*N];
|
|
}
|
|
std::cout << " " << std::endl;
|
|
}
|
|
std::cout << std::endl;
|
|
|
|
MAT_SIZE_T kl = 1;
|
|
MAT_SIZE_T ku = 1;
|
|
MAT_SIZE_T nrowAB = 2*kl + ku + 1;
|
|
MAT_SIZE_T ldab = nrowAB;
|
|
std::vector<double> AB(nrowAB*N, 0.);
|
|
BandMatrixCoeff bmc(N, ku, kl);
|
|
|
|
// Rewrite AA matrix in band format AB
|
|
for (MAT_SIZE_T i = 0; i < N; ++i) {
|
|
for (MAT_SIZE_T j = -1; j < 2; ++j) {
|
|
if (i + j > -1 && i + j < N)
|
|
AB[bmc(i, i + j)] = AA[i + N*(i + j)];
|
|
}
|
|
}
|
|
|
|
for (MAT_SIZE_T i = 0; i < nrowAB; ++i) {
|
|
for (MAT_SIZE_T j = 0; j < N; ++j) {
|
|
std::cout << " " << AB[i + j*nrowAB];
|
|
}
|
|
std::cout << " " << std::endl;
|
|
}
|
|
std::cout << std::endl;
|
|
|
|
|
|
dgesv_(&N ,&nrhs, &AA[0], &lda, &ipiv[0], &BB[0], &ldb, &info);
|
|
|
|
if (info == 0) {
|
|
for (MAT_SIZE_T i = 0; i < N; ++i) {
|
|
std::cout << BB[i] << ' ';
|
|
}
|
|
std::cout << std::endl;
|
|
} else {
|
|
std::cerr << "Something went wrong in debsv_()\n";
|
|
}
|
|
|
|
for (MAT_SIZE_T i = 0; i < N; ++i) {
|
|
BB[i] = i;
|
|
}
|
|
|
|
dgbsv_(&N, &kl, &ku, &nrhs, &AB[0], &ldab, &ipiv[0], &BB[0], &ldb, &info);
|
|
|
|
if (info == 0) {
|
|
for (MAT_SIZE_T i = 0; i < N; ++i) {
|
|
std::cout << BB[i] << ' ';
|
|
}
|
|
std::cout << std::endl;
|
|
} else {
|
|
std::cerr << "Something went wrong in debsv_()\n";
|
|
}
|
|
|
|
|
|
}
|
|
|