/usr/include/fflas-ffpack/checkers/checker_invert.inl is in fflas-ffpack-common 2.2.2-5.
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// vim:sts=8:sw=8:ts=8:noet:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s
/* checkers/Checker_invert.inl
* Copyright (C) 2016 Ashley Lesdalons
*
* Written by Ashley Lesdalons <Ashley.Lesdalons@e.ujf-grenoble.fr>
*
*
* ========LICENCE========
* This file is part of the library FFLAS-FFPACK.
*
* FFLAS-FFPACK is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*.
*/
#ifndef __FFLASFFPACK_checker_invert_INL
#define __FFLASFFPACK_checker_invert_INL
namespace FFPACK {
template <class Field>
class CheckerImplem_invert {
const Field& F;
typename Field::Element_ptr v,w;
const size_t m,lda;
public:
CheckerImplem_invert(const Field& F_, const size_t m_, typename Field::ConstElement_ptr A, const size_t lda_)
: F(F_), v(FFLAS::fflas_new(F_,m_,1)), w(FFLAS::fflas_new(F_,m_,1)), m(m_), lda(lda_)
{
typename Field::RandIter G(F);
init(G,m,A,lda);
}
CheckerImplem_invert(typename Field::RandIter &G, const size_t m_, typename Field::ConstElement_ptr A, const size_t lda_)
: F(G.ring()), v(FFLAS::fflas_new(F,m_,1)), w(FFLAS::fflas_new(F,m_,1)), m(m_), lda(lda_)
{
init(G,m,A,lda);
}
~CheckerImplem_invert() {
FFLAS::fflas_delete(v,w);
}
inline bool check(typename Field::ConstElement_ptr A, int nullity) {
// v <- A.w - v
FFLAS::fgemv(F, FFLAS::FflasNoTrans, m, m, F.one, A, lda, w, 1, F.mOne, v, 1);
bool pass = FFLAS::fiszero(F,m,1,v,1) || (nullity != 0);
if (!pass) throw FailureInvertCheck();
return pass;
}
private:
void init(typename Field::RandIter &G, const size_t m_, typename Field::ConstElement_ptr A, const size_t lda_) {
FFLAS::frand(F,G,m,v,1);
// write_field(F,std::cerr<<"init A : ",A,m,m,lda,true)<<std::endl;
// write_field(F,std::cerr<<"init v : ",v,m,1,1,true)<<std::endl;
// w <- A.v
FFLAS::fgemv(F, FFLAS::FflasNoTrans, m, m, F.one, A, lda, v, 1, F.zero, w, 1);
// write_field(F,std::cerr<<"init w : ",w,m,1,1,true)<<std::endl;
}
};
}
#endif // __FFLASFFPACK_checker_invert_INL
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