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sbgv.hpp
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sbgv.hpp
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//
// Copyright (c) 2002--2010
// Toon Knapen, Karl Meerbergen, Kresimir Fresl,
// Thomas Klimpel and Rutger ter Borg
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// THIS FILE IS AUTOMATICALLY GENERATED
// PLEASE DO NOT EDIT!
//
#ifndef BOOST_NUMERIC_BINDINGS_LAPACK_DRIVER_SBGV_HPP
#define BOOST_NUMERIC_BINDINGS_LAPACK_DRIVER_SBGV_HPP
#include <boost/assert.hpp>
#include <Core/Utils/numeric/bindings/bandwidth.hpp>
#include <Core/Utils/numeric/bindings/begin.hpp>
#include <Core/Utils/numeric/bindings/detail/array.hpp>
#include <Core/Utils/numeric/bindings/is_column_major.hpp>
#include <Core/Utils/numeric/bindings/is_mutable.hpp>
#include <Core/Utils/numeric/bindings/lapack/workspace.hpp>
#include <Core/Utils/numeric/bindings/remove_imaginary.hpp>
#include <Core/Utils/numeric/bindings/size.hpp>
#include <Core/Utils/numeric/bindings/stride.hpp>
#include <Core/Utils/numeric/bindings/uplo_tag.hpp>
#include <Core/Utils/numeric/bindings/value_type.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/remove_const.hpp>
//
// The LAPACK-backend for sbgv is the netlib-compatible backend.
//
#include <Core/Utils/numeric/bindings/lapack/detail/lapack.h>
#include <Core/Utils/numeric/bindings/lapack/detail/lapack_option.hpp>
namespace boost {
namespace numeric {
namespace bindings {
namespace lapack {
//
// The detail namespace contains value-type-overloaded functions that
// dispatch to the appropriate back-end LAPACK-routine.
//
namespace detail {
//
// Overloaded function for dispatching to
// * netlib-compatible LAPACK backend (the default), and
// * float value-type.
//
template< typename UpLo >
inline std::ptrdiff_t sbgv( const char jobz, const UpLo, const fortran_int_t n,
const fortran_int_t ka, const fortran_int_t kb, float* ab,
const fortran_int_t ldab, float* bb, const fortran_int_t ldbb,
float* w, float* z, const fortran_int_t ldz, float* work ) {
fortran_int_t info(0);
LAPACK_SSBGV( &jobz, &lapack_option< UpLo >::value, &n, &ka, &kb, ab,
&ldab, bb, &ldbb, w, z, &ldz, work, &info );
return info;
}
//
// Overloaded function for dispatching to
// * netlib-compatible LAPACK backend (the default), and
// * double value-type.
//
template< typename UpLo >
inline std::ptrdiff_t sbgv( const char jobz, const UpLo, const fortran_int_t n,
const fortran_int_t ka, const fortran_int_t kb, double* ab,
const fortran_int_t ldab, double* bb, const fortran_int_t ldbb,
double* w, double* z, const fortran_int_t ldz, double* work ) {
fortran_int_t info(0);
LAPACK_DSBGV( &jobz, &lapack_option< UpLo >::value, &n, &ka, &kb, ab,
&ldab, bb, &ldbb, w, z, &ldz, work, &info );
return info;
}
} // namespace detail
//
// Value-type based template class. Use this class if you need a type
// for dispatching to sbgv.
//
template< typename Value >
struct sbgv_impl {
typedef Value value_type;
typedef typename remove_imaginary< Value >::type real_type;
//
// Static member function for user-defined workspaces, that
// * Deduces the required arguments for dispatching to LAPACK, and
// * Asserts that most arguments make sense.
//
template< typename MatrixAB, typename MatrixBB, typename VectorW,
typename MatrixZ, typename WORK >
static std::ptrdiff_t invoke( const char jobz, MatrixAB& ab, MatrixBB& bb,
VectorW& w, MatrixZ& z, detail::workspace1< WORK > work ) {
namespace bindings = ::boost::numeric::bindings;
typedef typename result_of::uplo_tag< MatrixAB >::type uplo;
BOOST_STATIC_ASSERT( (bindings::is_column_major< MatrixAB >::value) );
BOOST_STATIC_ASSERT( (bindings::is_column_major< MatrixBB >::value) );
BOOST_STATIC_ASSERT( (bindings::is_column_major< MatrixZ >::value) );
BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
typename bindings::value_type< MatrixAB >::type >::type,
typename remove_const< typename bindings::value_type<
MatrixBB >::type >::type >::value) );
BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
typename bindings::value_type< MatrixAB >::type >::type,
typename remove_const< typename bindings::value_type<
VectorW >::type >::type >::value) );
BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
typename bindings::value_type< MatrixAB >::type >::type,
typename remove_const< typename bindings::value_type<
MatrixZ >::type >::type >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< MatrixAB >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< MatrixBB >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorW >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< MatrixZ >::value) );
BOOST_ASSERT( bindings::bandwidth(ab, uplo()) >= 0 );
BOOST_ASSERT( bindings::bandwidth(bb, uplo()) >= 0 );
BOOST_ASSERT( bindings::size(work.select(real_type())) >=
min_size_work( bindings::size_column(ab) ));
BOOST_ASSERT( bindings::size_column(ab) >= 0 );
BOOST_ASSERT( bindings::size_minor(ab) == 1 ||
bindings::stride_minor(ab) == 1 );
BOOST_ASSERT( bindings::size_minor(bb) == 1 ||
bindings::stride_minor(bb) == 1 );
BOOST_ASSERT( bindings::size_minor(z) == 1 ||
bindings::stride_minor(z) == 1 );
BOOST_ASSERT( bindings::stride_major(ab) >= bindings::bandwidth(ab,
uplo())+1 );
BOOST_ASSERT( bindings::stride_major(bb) >= bindings::bandwidth(bb,
uplo())+1 );
BOOST_ASSERT( jobz == 'N' || jobz == 'V' );
return detail::sbgv( jobz, uplo(), bindings::size_column(ab),
bindings::bandwidth(ab, uplo()), bindings::bandwidth(bb,
uplo()), bindings::begin_value(ab),
bindings::stride_major(ab), bindings::begin_value(bb),
bindings::stride_major(bb), bindings::begin_value(w),
bindings::begin_value(z), bindings::stride_major(z),
bindings::begin_value(work.select(real_type())) );
}
//
// Static member function that
// * Figures out the minimal workspace requirements, and passes
// the results to the user-defined workspace overload of the
// invoke static member function
// * Enables the unblocked algorithm (BLAS level 2)
//
template< typename MatrixAB, typename MatrixBB, typename VectorW,
typename MatrixZ >
static std::ptrdiff_t invoke( const char jobz, MatrixAB& ab, MatrixBB& bb,
VectorW& w, MatrixZ& z, minimal_workspace ) {
namespace bindings = ::boost::numeric::bindings;
typedef typename result_of::uplo_tag< MatrixAB >::type uplo;
bindings::detail::array< real_type > tmp_work( min_size_work(
bindings::size_column(ab) ) );
return invoke( jobz, ab, bb, w, z, workspace( tmp_work ) );
}
//
// Static member function that
// * Figures out the optimal workspace requirements, and passes
// the results to the user-defined workspace overload of the
// invoke static member
// * Enables the blocked algorithm (BLAS level 3)
//
template< typename MatrixAB, typename MatrixBB, typename VectorW,
typename MatrixZ >
static std::ptrdiff_t invoke( const char jobz, MatrixAB& ab, MatrixBB& bb,
VectorW& w, MatrixZ& z, optimal_workspace ) {
namespace bindings = ::boost::numeric::bindings;
typedef typename result_of::uplo_tag< MatrixAB >::type uplo;
return invoke( jobz, ab, bb, w, z, minimal_workspace() );
}
//
// Static member function that returns the minimum size of
// workspace-array work.
//
static std::ptrdiff_t min_size_work( const std::ptrdiff_t n ) {
return 3*n;
}
};
//
// Functions for direct use. These functions are overloaded for temporaries,
// so that wrapped types can still be passed and used for write-access. In
// addition, if applicable, they are overloaded for user-defined workspaces.
// Calls to these functions are passed to the sbgv_impl classes. In the
// documentation, most overloads are collapsed to avoid a large number of
// prototypes which are very similar.
//
//
// Overloaded function for sbgv. Its overload differs for
// * User-defined workspace
//
template< typename MatrixAB, typename MatrixBB, typename VectorW,
typename MatrixZ, typename Workspace >
inline typename boost::enable_if< detail::is_workspace< Workspace >,
std::ptrdiff_t >::type
sbgv( const char jobz, MatrixAB& ab, MatrixBB& bb, VectorW& w,
MatrixZ& z, Workspace work ) {
return sbgv_impl< typename bindings::value_type<
MatrixAB >::type >::invoke( jobz, ab, bb, w, z, work );
}
//
// Overloaded function for sbgv. Its overload differs for
// * Default workspace-type (optimal)
//
template< typename MatrixAB, typename MatrixBB, typename VectorW,
typename MatrixZ >
inline typename boost::disable_if< detail::is_workspace< MatrixZ >,
std::ptrdiff_t >::type
sbgv( const char jobz, MatrixAB& ab, MatrixBB& bb, VectorW& w,
MatrixZ& z ) {
return sbgv_impl< typename bindings::value_type<
MatrixAB >::type >::invoke( jobz, ab, bb, w, z,
optimal_workspace() );
}
} // namespace lapack
} // namespace bindings
} // namespace numeric
} // namespace boost
#endif