1 //
2 // Copyright (c) 2002--2010
3 // Toon Knapen, Karl Meerbergen, Kresimir Fresl,
4 // Thomas Klimpel and Rutger ter Borg
5 //
6 // Distributed under the Boost Software License, Version 1.0.
7 // (See accompanying file LICENSE_1_0.txt or copy at
8 // http://www.boost.org/LICENSE_1_0.txt)
9 //
10 // THIS FILE IS AUTOMATICALLY GENERATED
11 // PLEASE DO NOT EDIT!
12 //
13
14 #ifndef BOOST_NUMERIC_BINDINGS_LAPACK_DRIVER_STEVX_HPP
15 #define BOOST_NUMERIC_BINDINGS_LAPACK_DRIVER_STEVX_HPP
16
17 #include <boost/assert.hpp>
18 #include <boost/numeric/bindings/begin.hpp>
19 #include <boost/numeric/bindings/detail/array.hpp>
20 #include <boost/numeric/bindings/is_column_major.hpp>
21 #include <boost/numeric/bindings/is_mutable.hpp>
22 #include <boost/numeric/bindings/lapack/workspace.hpp>
23 #include <boost/numeric/bindings/remove_imaginary.hpp>
24 #include <boost/numeric/bindings/size.hpp>
25 #include <boost/numeric/bindings/stride.hpp>
26 #include <boost/numeric/bindings/value_type.hpp>
27 #include <boost/static_assert.hpp>
28 #include <boost/type_traits/is_same.hpp>
29 #include <boost/type_traits/remove_const.hpp>
30
31 //
32 // The LAPACK-backend for stevx is the netlib-compatible backend.
33 //
34 #include <boost/numeric/bindings/lapack/detail/lapack.h>
35 #include <boost/numeric/bindings/lapack/detail/lapack_option.hpp>
36
37 namespace boost {
38 namespace numeric {
39 namespace bindings {
40 namespace lapack {
41
42 //
43 // The detail namespace contains value-type-overloaded functions that
44 // dispatch to the appropriate back-end LAPACK-routine.
45 //
46 namespace detail {
47
48 //
49 // Overloaded function for dispatching to
50 // * netlib-compatible LAPACK backend (the default), and
51 // * float value-type.
52 //
stevx(const char jobz,const char range,const fortran_int_t n,float * d,float * e,const float vl,const float vu,const fortran_int_t il,const fortran_int_t iu,const float abstol,fortran_int_t & m,float * w,float * z,const fortran_int_t ldz,float * work,fortran_int_t * iwork,fortran_int_t * ifail)53 inline std::ptrdiff_t stevx( const char jobz, const char range,
54 const fortran_int_t n, float* d, float* e, const float vl,
55 const float vu, const fortran_int_t il, const fortran_int_t iu,
56 const float abstol, fortran_int_t& m, float* w, float* z,
57 const fortran_int_t ldz, float* work, fortran_int_t* iwork,
58 fortran_int_t* ifail ) {
59 fortran_int_t info(0);
60 LAPACK_SSTEVX( &jobz, &range, &n, d, e, &vl, &vu, &il, &iu, &abstol, &m,
61 w, z, &ldz, work, iwork, ifail, &info );
62 return info;
63 }
64
65 //
66 // Overloaded function for dispatching to
67 // * netlib-compatible LAPACK backend (the default), and
68 // * double value-type.
69 //
stevx(const char jobz,const char range,const fortran_int_t n,double * d,double * e,const double vl,const double vu,const fortran_int_t il,const fortran_int_t iu,const double abstol,fortran_int_t & m,double * w,double * z,const fortran_int_t ldz,double * work,fortran_int_t * iwork,fortran_int_t * ifail)70 inline std::ptrdiff_t stevx( const char jobz, const char range,
71 const fortran_int_t n, double* d, double* e, const double vl,
72 const double vu, const fortran_int_t il, const fortran_int_t iu,
73 const double abstol, fortran_int_t& m, double* w, double* z,
74 const fortran_int_t ldz, double* work, fortran_int_t* iwork,
75 fortran_int_t* ifail ) {
76 fortran_int_t info(0);
77 LAPACK_DSTEVX( &jobz, &range, &n, d, e, &vl, &vu, &il, &iu, &abstol, &m,
78 w, z, &ldz, work, iwork, ifail, &info );
79 return info;
80 }
81
82 } // namespace detail
83
84 //
85 // Value-type based template class. Use this class if you need a type
86 // for dispatching to stevx.
87 //
88 template< typename Value >
89 struct stevx_impl {
90
91 typedef Value value_type;
92 typedef typename remove_imaginary< Value >::type real_type;
93
94 //
95 // Static member function for user-defined workspaces, that
96 // * Deduces the required arguments for dispatching to LAPACK, and
97 // * Asserts that most arguments make sense.
98 //
99 template< typename VectorD, typename VectorE, typename VectorW,
100 typename MatrixZ, typename VectorIFAIL, typename WORK,
101 typename IWORK >
invokeboost::numeric::bindings::lapack::stevx_impl102 static std::ptrdiff_t invoke( const char jobz, const char range,
103 const fortran_int_t n, VectorD& d, VectorE& e,
104 const real_type vl, const real_type vu,
105 const fortran_int_t il, const fortran_int_t iu,
106 const real_type abstol, fortran_int_t& m, VectorW& w,
107 MatrixZ& z, VectorIFAIL& ifail, detail::workspace2< WORK,
108 IWORK > work ) {
109 namespace bindings = ::boost::numeric::bindings;
110 BOOST_STATIC_ASSERT( (bindings::is_column_major< MatrixZ >::value) );
111 BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
112 typename bindings::value_type< VectorD >::type >::type,
113 typename remove_const< typename bindings::value_type<
114 VectorE >::type >::type >::value) );
115 BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
116 typename bindings::value_type< VectorD >::type >::type,
117 typename remove_const< typename bindings::value_type<
118 VectorW >::type >::type >::value) );
119 BOOST_STATIC_ASSERT( (boost::is_same< typename remove_const<
120 typename bindings::value_type< VectorD >::type >::type,
121 typename remove_const< typename bindings::value_type<
122 MatrixZ >::type >::type >::value) );
123 BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorD >::value) );
124 BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorE >::value) );
125 BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorW >::value) );
126 BOOST_STATIC_ASSERT( (bindings::is_mutable< MatrixZ >::value) );
127 BOOST_STATIC_ASSERT( (bindings::is_mutable< VectorIFAIL >::value) );
128 BOOST_ASSERT( bindings::size(d) >= n );
129 BOOST_ASSERT( bindings::size(e) >= std::max< std::ptrdiff_t >(1,n-1) );
130 BOOST_ASSERT( bindings::size(w) >= n );
131 BOOST_ASSERT( bindings::size(work.select(fortran_int_t())) >=
132 min_size_iwork( n ));
133 BOOST_ASSERT( bindings::size(work.select(real_type())) >=
134 min_size_work( n ));
135 BOOST_ASSERT( bindings::size_minor(z) == 1 ||
136 bindings::stride_minor(z) == 1 );
137 BOOST_ASSERT( jobz == 'N' || jobz == 'V' );
138 BOOST_ASSERT( n >= 0 );
139 BOOST_ASSERT( range == 'A' || range == 'V' || range == 'I' );
140 return detail::stevx( jobz, range, n, bindings::begin_value(d),
141 bindings::begin_value(e), vl, vu, il, iu, abstol, m,
142 bindings::begin_value(w), bindings::begin_value(z),
143 bindings::stride_major(z),
144 bindings::begin_value(work.select(real_type())),
145 bindings::begin_value(work.select(fortran_int_t())),
146 bindings::begin_value(ifail) );
147 }
148
149 //
150 // Static member function that
151 // * Figures out the minimal workspace requirements, and passes
152 // the results to the user-defined workspace overload of the
153 // invoke static member function
154 // * Enables the unblocked algorithm (BLAS level 2)
155 //
156 template< typename VectorD, typename VectorE, typename VectorW,
157 typename MatrixZ, typename VectorIFAIL >
invokeboost::numeric::bindings::lapack::stevx_impl158 static std::ptrdiff_t invoke( const char jobz, const char range,
159 const fortran_int_t n, VectorD& d, VectorE& e,
160 const real_type vl, const real_type vu,
161 const fortran_int_t il, const fortran_int_t iu,
162 const real_type abstol, fortran_int_t& m, VectorW& w,
163 MatrixZ& z, VectorIFAIL& ifail, minimal_workspace ) {
164 namespace bindings = ::boost::numeric::bindings;
165 bindings::detail::array< real_type > tmp_work( min_size_work( n ) );
166 bindings::detail::array< fortran_int_t > tmp_iwork(
167 min_size_iwork( n ) );
168 return invoke( jobz, range, n, d, e, vl, vu, il, iu, abstol, m, w, z,
169 ifail, workspace( tmp_work, tmp_iwork ) );
170 }
171
172 //
173 // Static member function that
174 // * Figures out the optimal workspace requirements, and passes
175 // the results to the user-defined workspace overload of the
176 // invoke static member
177 // * Enables the blocked algorithm (BLAS level 3)
178 //
179 template< typename VectorD, typename VectorE, typename VectorW,
180 typename MatrixZ, typename VectorIFAIL >
invokeboost::numeric::bindings::lapack::stevx_impl181 static std::ptrdiff_t invoke( const char jobz, const char range,
182 const fortran_int_t n, VectorD& d, VectorE& e,
183 const real_type vl, const real_type vu,
184 const fortran_int_t il, const fortran_int_t iu,
185 const real_type abstol, fortran_int_t& m, VectorW& w,
186 MatrixZ& z, VectorIFAIL& ifail, optimal_workspace ) {
187 namespace bindings = ::boost::numeric::bindings;
188 return invoke( jobz, range, n, d, e, vl, vu, il, iu, abstol, m, w, z,
189 ifail, minimal_workspace() );
190 }
191
192 //
193 // Static member function that returns the minimum size of
194 // workspace-array work.
195 //
min_size_workboost::numeric::bindings::lapack::stevx_impl196 static std::ptrdiff_t min_size_work( const std::ptrdiff_t n ) {
197 return 5*n;
198 }
199
200 //
201 // Static member function that returns the minimum size of
202 // workspace-array iwork.
203 //
min_size_iworkboost::numeric::bindings::lapack::stevx_impl204 static std::ptrdiff_t min_size_iwork( const std::ptrdiff_t n ) {
205 return 5*n;
206 }
207 };
208
209
210 //
211 // Functions for direct use. These functions are overloaded for temporaries,
212 // so that wrapped types can still be passed and used for write-access. In
213 // addition, if applicable, they are overloaded for user-defined workspaces.
214 // Calls to these functions are passed to the stevx_impl classes. In the
215 // documentation, most overloads are collapsed to avoid a large number of
216 // prototypes which are very similar.
217 //
218
219 //
220 // Overloaded function for stevx. Its overload differs for
221 // * User-defined workspace
222 //
223 template< typename VectorD, typename VectorE, typename VectorW,
224 typename MatrixZ, typename VectorIFAIL, typename Workspace >
225 inline typename boost::enable_if< detail::is_workspace< Workspace >,
226 std::ptrdiff_t >::type
stevx(const char jobz,const char range,const fortran_int_t n,VectorD & d,VectorE & e,const typename remove_imaginary<typename bindings::value_type<VectorD>::type>::type vl,const typename remove_imaginary<typename bindings::value_type<VectorD>::type>::type vu,const fortran_int_t il,const fortran_int_t iu,const typename remove_imaginary<typename bindings::value_type<VectorD>::type>::type abstol,fortran_int_t & m,VectorW & w,MatrixZ & z,VectorIFAIL & ifail,Workspace work)227 stevx( const char jobz, const char range, const fortran_int_t n,
228 VectorD& d, VectorE& e, const typename remove_imaginary<
229 typename bindings::value_type< VectorD >::type >::type vl,
230 const typename remove_imaginary< typename bindings::value_type<
231 VectorD >::type >::type vu, const fortran_int_t il,
232 const fortran_int_t iu, const typename remove_imaginary<
233 typename bindings::value_type< VectorD >::type >::type abstol,
234 fortran_int_t& m, VectorW& w, MatrixZ& z, VectorIFAIL& ifail,
235 Workspace work ) {
236 return stevx_impl< typename bindings::value_type<
237 VectorD >::type >::invoke( jobz, range, n, d, e, vl, vu, il, iu,
238 abstol, m, w, z, ifail, work );
239 }
240
241 //
242 // Overloaded function for stevx. Its overload differs for
243 // * Default workspace-type (optimal)
244 //
245 template< typename VectorD, typename VectorE, typename VectorW,
246 typename MatrixZ, typename VectorIFAIL >
247 inline typename boost::disable_if< detail::is_workspace< VectorIFAIL >,
248 std::ptrdiff_t >::type
stevx(const char jobz,const char range,const fortran_int_t n,VectorD & d,VectorE & e,const typename remove_imaginary<typename bindings::value_type<VectorD>::type>::type vl,const typename remove_imaginary<typename bindings::value_type<VectorD>::type>::type vu,const fortran_int_t il,const fortran_int_t iu,const typename remove_imaginary<typename bindings::value_type<VectorD>::type>::type abstol,fortran_int_t & m,VectorW & w,MatrixZ & z,VectorIFAIL & ifail)249 stevx( const char jobz, const char range, const fortran_int_t n,
250 VectorD& d, VectorE& e, const typename remove_imaginary<
251 typename bindings::value_type< VectorD >::type >::type vl,
252 const typename remove_imaginary< typename bindings::value_type<
253 VectorD >::type >::type vu, const fortran_int_t il,
254 const fortran_int_t iu, const typename remove_imaginary<
255 typename bindings::value_type< VectorD >::type >::type abstol,
256 fortran_int_t& m, VectorW& w, MatrixZ& z, VectorIFAIL& ifail ) {
257 return stevx_impl< typename bindings::value_type<
258 VectorD >::type >::invoke( jobz, range, n, d, e, vl, vu, il, iu,
259 abstol, m, w, z, ifail, optimal_workspace() );
260 }
261
262 } // namespace lapack
263 } // namespace bindings
264 } // namespace numeric
265 } // namespace boost
266
267 #endif
268