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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_COMPUTATIONAL_BDSDC_HPP
#define BOOST_NUMERIC_BINDINGS_LAPACK_COMPUTATIONAL_BDSDC_HPP
#include <boost/assert.hpp>
#include <boost/numeric/bindings/begin.hpp>
#include <boost/numeric/bindings/detail/array.hpp>
#include <boost/numeric/bindings/is_column_major.hpp>
#include <boost/numeric/bindings/is_mutable.hpp>
#include <boost/numeric/bindings/lapack/workspace.hpp>
#include <boost/numeric/bindings/remove_imaginary.hpp>
#include <boost/numeric/bindings/size.hpp>
#include <boost/numeric/bindings/stride.hpp>
#include <boost/numeric/bindings/uplo_tag.hpp>
#include <boost/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 bdsdc is the netlib-compatible backend.
//
#include <boost/numeric/bindings/lapack/detail/lapack.h>
#include <boost/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.
//
inline std::ptrdiff_t bdsdc( const char uplo, const char compq,
const fortran_int_t n, float* d, float* e, float* u,
const fortran_int_t ldu, float* vt, const fortran_int_t ldvt,
float* q, fortran_int_t* iq, float* work, fortran_int_t* iwork ) {
fortran_int_t info(0);
LAPACK_SBDSDC( &uplo, &compq, &n, d, e, u, &ldu, vt, &ldvt, q, iq, work,
iwork, &info );
return info;
}
//
// Overloaded function for dispatching to
// * netlib-compatible LAPACK backend (the default), and
// * double value-type.
//
inline std::ptrdiff_t bdsdc( const char uplo, const char compq,
const fortran_int_t n, double* d, double* e, double* u,
const fortran_int_t ldu, double* vt, const fortran_int_t ldvt,
double* q, fortran_int_t* iq, double* work, fortran_int_t* iwork ) {
fortran_int_t info(0);
LAPACK_DBDSDC( &uplo, &compq, &n, d, e, u, &ldu, vt, &ldvt, q, iq, work,
iwork, &info );
return info;
}
} // namespace detail
//
// Value-type based template class. Use this class if you need a type
// for dispatching to bdsdc.
//
template< typename Value >
struct bdsdc_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 VectorD, typename VectorE, typename MatrixU,
typename MatrixVT, typename VectorQ, typename VectorIQ,
typename WORK, typename IWORK >
static std::ptrdiff_t invoke( const char uplo, const char compq,
const fortran_int_t n, VectorD& d, VectorE& e, MatrixU& u,
MatrixVT& vt, VectorQ& q, VectorIQ& iq, detail::workspace2< WORK,
IWORK > work ) {
namespace bindings = ::boost::numeric::bindings;
BOOST_STATIC_ASSERT( (bindings::is_column_major< MatrixU >::value) );
BOOST_STATIC_ASSERT( (bindings::is_column_major< MatrixVT >::value) );
BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
typename bindings::value_type< VectorD >::type >::type,
typename remove_const< typename bindings::value_type<
VectorE >::type >::type >::value) );
BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
typename bindings::value_type< VectorD >::type >::type,
typename remove_const< typename bindings::value_type<
MatrixU >::type >::type >::value) );
BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
typename bindings::value_type< VectorD >::type >::type,
typename remove_const< typename bindings::value_type<
MatrixVT >::type >::type >::value) );
BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
typename bindings::value_type< VectorD >::type >::type,
typename remove_const< typename bindings::value_type<
VectorQ >::type >::type >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorD >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorE >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< MatrixU >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< MatrixVT >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorQ >::value) );
BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorIQ >::value) );
BOOST_ASSERT( bindings::size(e) >= n-1 );
BOOST_ASSERT( bindings::size(work.select(fortran_int_t())) >=
min_size_iwork( n ));
BOOST_ASSERT( bindings::size(work.select(real_type())) >=
min_size_work( compq, n ));
BOOST_ASSERT( bindings::size_minor(u) == 1 ||
bindings::stride_minor(u) == 1 );
BOOST_ASSERT( bindings::size_minor(vt) == 1 ||
bindings::stride_minor(vt) == 1 );
BOOST_ASSERT( compq == 'N' || compq == 'P' || compq == 'I' );
BOOST_ASSERT( n >= 0 );
return detail::bdsdc( uplo, compq, n, bindings::begin_value(d),
bindings::begin_value(e), bindings::begin_value(u),
bindings::stride_major(u), bindings::begin_value(vt),
bindings::stride_major(vt), bindings::begin_value(q),
bindings::begin_value(iq),
bindings::begin_value(work.select(real_type())),
bindings::begin_value(work.select(fortran_int_t())) );
}
//
// 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 VectorD, typename VectorE, typename MatrixU,
typename MatrixVT, typename VectorQ, typename VectorIQ >
static std::ptrdiff_t invoke( const char uplo, const char compq,
const fortran_int_t n, VectorD& d, VectorE& e, MatrixU& u,
MatrixVT& vt, VectorQ& q, VectorIQ& iq, minimal_workspace ) {
namespace bindings = ::boost::numeric::bindings;
bindings::detail::array< real_type > tmp_work( min_size_work( compq,
n ) );
bindings::detail::array< fortran_int_t > tmp_iwork(
min_size_iwork( n ) );
return invoke( uplo, compq, n, d, e, u, vt, q, iq,
workspace( tmp_work, tmp_iwork ) );
}
//
// 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 VectorD, typename VectorE, typename MatrixU,
typename MatrixVT, typename VectorQ, typename VectorIQ >
static std::ptrdiff_t invoke( const char uplo, const char compq,
const fortran_int_t n, VectorD& d, VectorE& e, MatrixU& u,
MatrixVT& vt, VectorQ& q, VectorIQ& iq, optimal_workspace ) {
namespace bindings = ::boost::numeric::bindings;
return invoke( uplo, compq, n, d, e, u, vt, q, iq,
minimal_workspace() );
}
//
// Static member function that returns the minimum size of
// workspace-array work.
//
static std::ptrdiff_t min_size_work( const char compq,
const std::ptrdiff_t n ) {
switch ( compq ) {
case 'N': return 4*n;
case 'P': return 6*n;
case 'I': return 3*n*n + 4*n;
}
}
//
// Static member function that returns the minimum size of
// workspace-array iwork.
//
static std::ptrdiff_t min_size_iwork( const std::ptrdiff_t n ) {
return 8*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 bdsdc_impl classes. In the
// documentation, most overloads are collapsed to avoid a large number of
// prototypes which are very similar.
//
//
// Overloaded function for bdsdc. Its overload differs for
// * User-defined workspace
//
template< typename VectorD, typename VectorE, typename MatrixU,
typename MatrixVT, typename VectorQ, typename VectorIQ,
typename Workspace >
inline typename boost::enable_if< detail::is_workspace< Workspace >,
std::ptrdiff_t >::type
bdsdc( const char uplo, const char compq, const fortran_int_t n,
VectorD& d, VectorE& e, MatrixU& u, MatrixVT& vt, VectorQ& q,
VectorIQ& iq, Workspace work ) {
return bdsdc_impl< typename bindings::value_type<
VectorD >::type >::invoke( uplo, compq, n, d, e, u, vt, q, iq,
work );
}
//
// Overloaded function for bdsdc. Its overload differs for
// * Default workspace-type (optimal)
//
template< typename VectorD, typename VectorE, typename MatrixU,
typename MatrixVT, typename VectorQ, typename VectorIQ >
inline typename boost::disable_if< detail::is_workspace< VectorIQ >,
std::ptrdiff_t >::type
bdsdc( const char uplo, const char compq, const fortran_int_t n,
VectorD& d, VectorE& e, MatrixU& u, MatrixVT& vt, VectorQ& q,
VectorIQ& iq ) {
return bdsdc_impl< typename bindings::value_type<
VectorD >::type >::invoke( uplo, compq, n, d, e, u, vt, q, iq,
optimal_workspace() );
}
} // namespace lapack
} // namespace bindings
} // namespace numeric
} // namespace boost
#endif
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