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257 lines
10 KiB
257 lines
10 KiB
6 years ago
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//
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// Copyright (c) 2002--2010
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// Toon Knapen, Karl Meerbergen, Kresimir Fresl,
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// Thomas Klimpel and Rutger ter Borg
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// THIS FILE IS AUTOMATICALLY GENERATED
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// PLEASE DO NOT EDIT!
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//
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#ifndef BOOST_NUMERIC_BINDINGS_LAPACK_COMPUTATIONAL_BDSDC_HPP
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#define BOOST_NUMERIC_BINDINGS_LAPACK_COMPUTATIONAL_BDSDC_HPP
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#include <boost/assert.hpp>
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#include <boost/numeric/bindings/begin.hpp>
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#include <boost/numeric/bindings/detail/array.hpp>
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#include <boost/numeric/bindings/is_column_major.hpp>
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#include <boost/numeric/bindings/is_mutable.hpp>
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#include <boost/numeric/bindings/lapack/workspace.hpp>
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#include <boost/numeric/bindings/remove_imaginary.hpp>
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#include <boost/numeric/bindings/size.hpp>
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#include <boost/numeric/bindings/stride.hpp>
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#include <boost/numeric/bindings/uplo_tag.hpp>
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#include <boost/numeric/bindings/value_type.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_traits/remove_const.hpp>
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//
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// The LAPACK-backend for bdsdc is the netlib-compatible backend.
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//
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#include <boost/numeric/bindings/lapack/detail/lapack.h>
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#include <boost/numeric/bindings/lapack/detail/lapack_option.hpp>
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namespace boost {
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namespace numeric {
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namespace bindings {
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namespace lapack {
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//
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// The detail namespace contains value-type-overloaded functions that
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// dispatch to the appropriate back-end LAPACK-routine.
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//
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namespace detail {
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//
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// Overloaded function for dispatching to
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// * netlib-compatible LAPACK backend (the default), and
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// * float value-type.
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//
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inline std::ptrdiff_t bdsdc( const char uplo, const char compq,
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const fortran_int_t n, float* d, float* e, float* u,
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const fortran_int_t ldu, float* vt, const fortran_int_t ldvt,
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float* q, fortran_int_t* iq, float* work, fortran_int_t* iwork ) {
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fortran_int_t info(0);
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LAPACK_SBDSDC( &uplo, &compq, &n, d, e, u, &ldu, vt, &ldvt, q, iq, work,
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iwork, &info );
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return info;
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}
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//
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// Overloaded function for dispatching to
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// * netlib-compatible LAPACK backend (the default), and
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// * double value-type.
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//
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inline std::ptrdiff_t bdsdc( const char uplo, const char compq,
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const fortran_int_t n, double* d, double* e, double* u,
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const fortran_int_t ldu, double* vt, const fortran_int_t ldvt,
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double* q, fortran_int_t* iq, double* work, fortran_int_t* iwork ) {
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fortran_int_t info(0);
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LAPACK_DBDSDC( &uplo, &compq, &n, d, e, u, &ldu, vt, &ldvt, q, iq, work,
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iwork, &info );
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return info;
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}
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} // namespace detail
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//
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// Value-type based template class. Use this class if you need a type
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// for dispatching to bdsdc.
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//
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template< typename Value >
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struct bdsdc_impl {
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typedef Value value_type;
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typedef typename remove_imaginary< Value >::type real_type;
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//
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// Static member function for user-defined workspaces, that
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// * Deduces the required arguments for dispatching to LAPACK, and
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// * Asserts that most arguments make sense.
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//
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template< typename VectorD, typename VectorE, typename MatrixU,
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typename MatrixVT, typename VectorQ, typename VectorIQ,
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typename WORK, typename IWORK >
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static std::ptrdiff_t invoke( const char uplo, const char compq,
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const fortran_int_t n, VectorD& d, VectorE& e, MatrixU& u,
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MatrixVT& vt, VectorQ& q, VectorIQ& iq, detail::workspace2< WORK,
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IWORK > work ) {
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namespace bindings = ::boost::numeric::bindings;
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BOOST_STATIC_ASSERT( (bindings::is_column_major< MatrixU >::value) );
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BOOST_STATIC_ASSERT( (bindings::is_column_major< MatrixVT >::value) );
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BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
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typename bindings::value_type< VectorD >::type >::type,
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typename remove_const< typename bindings::value_type<
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VectorE >::type >::type >::value) );
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BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
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typename bindings::value_type< VectorD >::type >::type,
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typename remove_const< typename bindings::value_type<
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MatrixU >::type >::type >::value) );
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BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
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typename bindings::value_type< VectorD >::type >::type,
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typename remove_const< typename bindings::value_type<
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MatrixVT >::type >::type >::value) );
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BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
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typename bindings::value_type< VectorD >::type >::type,
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typename remove_const< typename bindings::value_type<
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VectorQ >::type >::type >::value) );
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BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorD >::value) );
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BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorE >::value) );
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BOOST_STATIC_ASSERT( (bindings::is_mutable< MatrixU >::value) );
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BOOST_STATIC_ASSERT( (bindings::is_mutable< MatrixVT >::value) );
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BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorQ >::value) );
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BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorIQ >::value) );
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BOOST_ASSERT( bindings::size(e) >= n-1 );
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BOOST_ASSERT( bindings::size(work.select(fortran_int_t())) >=
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min_size_iwork( n ));
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BOOST_ASSERT( bindings::size(work.select(real_type())) >=
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min_size_work( compq, n ));
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BOOST_ASSERT( bindings::size_minor(u) == 1 ||
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bindings::stride_minor(u) == 1 );
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BOOST_ASSERT( bindings::size_minor(vt) == 1 ||
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bindings::stride_minor(vt) == 1 );
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BOOST_ASSERT( compq == 'N' || compq == 'P' || compq == 'I' );
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BOOST_ASSERT( n >= 0 );
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return detail::bdsdc( uplo, compq, n, bindings::begin_value(d),
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bindings::begin_value(e), bindings::begin_value(u),
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bindings::stride_major(u), bindings::begin_value(vt),
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bindings::stride_major(vt), bindings::begin_value(q),
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bindings::begin_value(iq),
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bindings::begin_value(work.select(real_type())),
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bindings::begin_value(work.select(fortran_int_t())) );
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}
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//
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// Static member function that
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// * Figures out the minimal workspace requirements, and passes
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// the results to the user-defined workspace overload of the
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// invoke static member function
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// * Enables the unblocked algorithm (BLAS level 2)
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//
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template< typename VectorD, typename VectorE, typename MatrixU,
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typename MatrixVT, typename VectorQ, typename VectorIQ >
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static std::ptrdiff_t invoke( const char uplo, const char compq,
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const fortran_int_t n, VectorD& d, VectorE& e, MatrixU& u,
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MatrixVT& vt, VectorQ& q, VectorIQ& iq, minimal_workspace ) {
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namespace bindings = ::boost::numeric::bindings;
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bindings::detail::array< real_type > tmp_work( min_size_work( compq,
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n ) );
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bindings::detail::array< fortran_int_t > tmp_iwork(
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min_size_iwork( n ) );
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return invoke( uplo, compq, n, d, e, u, vt, q, iq,
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workspace( tmp_work, tmp_iwork ) );
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}
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//
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// Static member function that
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// * Figures out the optimal workspace requirements, and passes
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// the results to the user-defined workspace overload of the
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// invoke static member
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// * Enables the blocked algorithm (BLAS level 3)
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//
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template< typename VectorD, typename VectorE, typename MatrixU,
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typename MatrixVT, typename VectorQ, typename VectorIQ >
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static std::ptrdiff_t invoke( const char uplo, const char compq,
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const fortran_int_t n, VectorD& d, VectorE& e, MatrixU& u,
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MatrixVT& vt, VectorQ& q, VectorIQ& iq, optimal_workspace ) {
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namespace bindings = ::boost::numeric::bindings;
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return invoke( uplo, compq, n, d, e, u, vt, q, iq,
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minimal_workspace() );
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}
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//
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// Static member function that returns the minimum size of
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// workspace-array work.
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//
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static std::ptrdiff_t min_size_work( const char compq,
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const std::ptrdiff_t n ) {
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switch ( compq ) {
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case 'N': return 4*n;
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case 'P': return 6*n;
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case 'I': return 3*n*n + 4*n;
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}
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}
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//
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// Static member function that returns the minimum size of
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// workspace-array iwork.
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//
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static std::ptrdiff_t min_size_iwork( const std::ptrdiff_t n ) {
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return 8*n;
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}
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};
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//
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// Functions for direct use. These functions are overloaded for temporaries,
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// so that wrapped types can still be passed and used for write-access. In
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// addition, if applicable, they are overloaded for user-defined workspaces.
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// Calls to these functions are passed to the bdsdc_impl classes. In the
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// documentation, most overloads are collapsed to avoid a large number of
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// prototypes which are very similar.
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//
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//
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// Overloaded function for bdsdc. Its overload differs for
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// * User-defined workspace
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//
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template< typename VectorD, typename VectorE, typename MatrixU,
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typename MatrixVT, typename VectorQ, typename VectorIQ,
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typename Workspace >
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inline typename boost::enable_if< detail::is_workspace< Workspace >,
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std::ptrdiff_t >::type
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bdsdc( const char uplo, const char compq, const fortran_int_t n,
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VectorD& d, VectorE& e, MatrixU& u, MatrixVT& vt, VectorQ& q,
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VectorIQ& iq, Workspace work ) {
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return bdsdc_impl< typename bindings::value_type<
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VectorD >::type >::invoke( uplo, compq, n, d, e, u, vt, q, iq,
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work );
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}
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//
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// Overloaded function for bdsdc. Its overload differs for
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// * Default workspace-type (optimal)
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//
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template< typename VectorD, typename VectorE, typename MatrixU,
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typename MatrixVT, typename VectorQ, typename VectorIQ >
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inline typename boost::disable_if< detail::is_workspace< VectorIQ >,
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std::ptrdiff_t >::type
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bdsdc( const char uplo, const char compq, const fortran_int_t n,
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VectorD& d, VectorE& e, MatrixU& u, MatrixVT& vt, VectorQ& q,
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VectorIQ& iq ) {
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return bdsdc_impl< typename bindings::value_type<
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VectorD >::type >::invoke( uplo, compq, n, d, e, u, vt, q, iq,
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optimal_workspace() );
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}
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} // namespace lapack
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} // namespace bindings
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} // namespace numeric
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} // namespace boost
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#endif
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