/usr/include/fflas-ffpack/checkers/checker_ftrsm.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_ftrsm.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_ftrsm_INL
#define __FFLASFFPACK_checker_ftrsm_INL
namespace FFLAS {
template <class Field>
class CheckerImplem_ftrsm {
const Field& F;
typename Field::Element_ptr v,w;
public:
CheckerImplem_ftrsm(const Field& F_,
const size_t m, const size_t n,
const typename Field::Element alpha,
const typename Field::ConstElement_ptr B,
const size_t ldb)
: F(F_),
v(FFLAS::fflas_new(F_,n,1)),
w(FFLAS::fflas_new(F_,m,1))
{
typename Field::RandIter G(F);
init(G,m,n,B,ldb,alpha);
}
CheckerImplem_ftrsm(typename Field::RandIter &G,
const size_t m, const size_t n,
const typename Field::Element alpha,
const typename Field::ConstElement_ptr B,
const size_t ldb)
: F(G.ring()),
v(FFLAS::fflas_new(F,n,1)),
w(FFLAS::fflas_new(F,m,1))
{
init(G,m,n,B,ldb,alpha);
}
~CheckerImplem_ftrsm() {
FFLAS::fflas_delete(v,w);
}
inline bool check(const FFLAS::FFLAS_SIDE side,
const FFLAS::FFLAS_UPLO uplo,
const FFLAS::FFLAS_TRANSPOSE trans,
const FFLAS::FFLAS_DIAG diag,
const size_t m, const size_t n,
#ifdef __FFLAS__TRSM_READONLY
typename Field::ConstElement_ptr
#else
typename Field::Element_ptr
#endif
A, size_t lda,
const typename Field::ConstElement_ptr X, size_t ldx) {
size_t k = (side==FFLAS::FflasLeft?m:n);
typename Field::Element_ptr v1 = FFLAS::fflas_new(F,k,1);
if (side==FFLAS::FflasLeft) {
// (Left) v1 <- X.v
// (Left) v1 <- A.v1
// (Left) w <- w - v1
FFLAS::fgemv(F, FFLAS::FflasNoTrans, m, n, F.one, X, ldx, v, 1, F.zero, v1, 1);
FFLAS::ftrmm(F, FFLAS::FflasLeft, uplo, trans, diag, k, 1, F.one, A, lda, v1, 1);
FFLAS::fsubin(F, m, v1, 1, w, 1);
} else {
// (Right) v <- A.v
// (Right) w <- X.v - w
FFLAS::ftrmm(F, FFLAS::FflasLeft, uplo, trans, diag, k, 1, F.one, A, lda, v, 1);
FFLAS::fgemv(F, FFLAS::FflasNoTrans, m, n, F.one, X, ldx, v, 1, F.mOne, w, 1);
}
FFLAS::fflas_delete(v1);
bool pass = FFLAS::fiszero(F,m,1,w,1);
if (!pass) throw FailureTrsmCheck();
return pass;
}
private:
inline void init(typename Field::RandIter &G, const size_t m, const size_t n, const typename Field::ConstElement_ptr B, size_t ldb, const typename Field::Element alpha) {
FFLAS::frand(F,G,n,v,1);
// w <- alpha.B.v
FFLAS::fgemv(F, FFLAS::FflasNoTrans, m, n, alpha, B, ldb, v, 1, F.zero, w, 1);
}
};
}
#endif // __FFLASFFPACK_checker_ftrsm_INL
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