mirror of
https://github.com/triqs/dft_tools
synced 2024-12-26 22:33:48 +01:00
61 lines
2.6 KiB
C++
61 lines
2.6 KiB
C++
/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2012 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#ifndef TRIQS_ARRAYS_BLAS_LAPACK_AXPY_H
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#define TRIQS_ARRAYS_BLAS_LAPACK_AXPY_H
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#include "./tools.hpp"
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//#include "./qcache.hpp"
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namespace triqs { namespace arrays { namespace blas {
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namespace f77 { // overload
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extern "C" {
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void TRIQS_FORTRAN_MANGLING(daxpy)(const int & N, const double & alpha, const double * x, const int& incx, double * y, const int& incy);
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void TRIQS_FORTRAN_MANGLING(zaxpy)(const int & N, const std::complex<double> & alpha, const std::complex<double> * x, const int& incx, std::complex<double> * y, const int& incy);
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}
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inline void axpy (const int & N, const double & alpha, const double* x, const int & incx, double* Y, const int & incy) {
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TRIQS_FORTRAN_MANGLING(daxpy)(N, alpha, x, incx, Y, incy);
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}
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inline void axpy (const int & N, const std::complex<double> & alpha, const std::complex<double>* x, const int & incx, std::complex<double>* Y, const int & incy) {
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TRIQS_FORTRAN_MANGLING(zaxpy)(N, alpha, x, incx, Y, incy);
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}
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}
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/**
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* Blas 1: copy
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*/
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template< typename VTX, typename VTY>
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typename std::enable_if< is_blas_lapack_type<typename VTX::value_type>::value && have_same_value_type< VTX, VTY>::value >::type
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axpy (typename VTX::value_type const & alpha ,VTX const & X, VTY & Y) {
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static_assert( is_amv_value_or_view_class<VTX>::value, "blas1 bindings only take vector and vector_view");
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static_assert( is_amv_value_or_view_class<VTY>::value, "blas1 bindings only take vector and vector_view");
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//if (( X.size() != Y.size()) ) Y.resize(X.size());
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//const_qcache<VTX> Cx(X); // mettre la condition a la main
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//f77::copy(X.size(), Cx().data_start(), Cx().stride(), Y.data_start(), Y.stride());
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f77::axpy(X.size(), alpha, X.data_start(), X.stride(), Y.data_start(), Y.stride());
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}
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}}}// namespace
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#endif
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