gesvd.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_LAPACK_CLAPACK_GESVD_H_
36 #define _BLAZE_MATH_LAPACK_CLAPACK_GESVD_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <blaze/util/Complex.h>
45 
46 
47 //=================================================================================================
48 //
49 // LAPACK FORWARD DECLARATIONS
50 //
51 //=================================================================================================
52 
53 //*************************************************************************************************
55 #if !defined(INTEL_MKL_VERSION)
56 extern "C" {
57 
58 void sgesvd_( char* jobu, char* jobv, int* m, int* n, float* A, int* lda, float* s, float* U, int* ldu, float* V, int* ldv, float* work, int* lwork, int* info );
59 void dgesvd_( char* jobu, char* jobv, int* m, int* n, double* A, int* lda, double* s, double* U, int* ldu, double* V, int* ldv, double* work, int* lwork, int* info );
60 void cgesvd_( char* jobu, char* jobv, int* m, int* n, float* A, int* lda, float* s, float* U, int* ldu, float* V, int* ldv, float* work, int* lwork, float* rwork, int* info );
61 void zgesvd_( char* jobu, char* jobv, int* m, int* n, double* A, int* lda, double* s, double* U, int* ldu, double* V, int* ldv, double* work, int* lwork, double* rwork, int* info );
62 
63 }
64 #endif
65 
66 //*************************************************************************************************
67 
68 
69 
70 
71 namespace blaze {
72 
73 //=================================================================================================
74 //
75 // LAPACK SVD FUNCTIONS (GESVD)
76 //
77 //=================================================================================================
78 
79 //*************************************************************************************************
82 inline void gesvd( char jobu, char jobv, int m, int n, float* A, int lda,
83  float* s, float* U, int ldu, float* V, int ldv,
84  float* work, int lwork, int* info );
85 
86 inline void gesvd( char jobu, char jobv, int m, int n, double* A, int lda,
87  double* s, double* U, int ldu, double* V, int ldv,
88  double* work, int lwork, int* info );
89 
90 inline void gesvd( char jobu, char jobv, int m, int n, complex<float>* A, int lda,
91  float* s, complex<float>* U, int ldu, complex<float>* V, int ldv,
92  complex<float>* work, int lwork, float* rwork, int* info );
93 
94 inline void gesvd( char jobu, char jobv, int m, int n, complex<double>* A, int lda,
95  double* s, complex<double>* U, int ldu, complex<double>* V, int ldv,
96  complex<double>* work, int lwork, double* rwork, int* info );
98 //*************************************************************************************************
99 
100 
101 //*************************************************************************************************
163 inline void gesvd( char jobu, char jobv, int m, int n, float* A, int lda,
164  float* s, float* U, int ldu, float* V, int ldv,
165  float* work, int lwork, int* info )
166 {
167 #if defined(INTEL_MKL_VERSION)
168  BLAZE_STATIC_ASSERT( sizeof( MKL_INT ) == sizeof( int ) );
169 #endif
170 
171  sgesvd_( &jobu, &jobv, &m, &n, A, &lda, s, U, &ldu, V, &ldv, work, &lwork, info );
172 }
173 //*************************************************************************************************
174 
175 
176 //*************************************************************************************************
238 inline void gesvd( char jobu, char jobv, int m, int n, double* A, int lda,
239  double* s, double* U, int ldu, double* V, int ldv,
240  double* work, int lwork, int* info )
241 {
242 #if defined(INTEL_MKL_VERSION)
243  BLAZE_STATIC_ASSERT( sizeof( MKL_INT ) == sizeof( int ) );
244 #endif
245 
246  dgesvd_( &jobu, &jobv, &m, &n, A, &lda, s, U, &ldu, V, &ldv, work, &lwork, info );
247 }
248 //*************************************************************************************************
249 
250 
251 //*************************************************************************************************
314 inline void gesvd( char jobu, char jobv, int m, int n, complex<float>* A, int lda,
315  float* s, complex<float>* U, int ldu, complex<float>* V, int ldv,
316  complex<float>* work, int lwork, float* rwork, int* info )
317 {
318  BLAZE_STATIC_ASSERT( sizeof( complex<float> ) == 2UL*sizeof( float ) );
319 
320 #if defined(INTEL_MKL_VERSION)
321  BLAZE_STATIC_ASSERT( sizeof( MKL_INT ) == sizeof( int ) );
322  using ET = MKL_Complex8;
323 #else
324  using ET = float;
325 #endif
326 
327  cgesvd_( &jobu, &jobv, &m, &n, reinterpret_cast<ET*>( A ), &lda, s,
328  reinterpret_cast<ET*>( U ), &ldu, reinterpret_cast<ET*>( V ), &ldv,
329  reinterpret_cast<ET*>( work ), &lwork, rwork, info );
330 }
331 //*************************************************************************************************
332 
333 
334 //*************************************************************************************************
397 inline void gesvd( char jobu, char jobv, int m, int n, complex<double>* A, int lda,
398  double* s, complex<double>* U, int ldu, complex<double>* V, int ldv,
399  complex<double>* work, int lwork, double* rwork, int* info )
400 {
401  BLAZE_STATIC_ASSERT( sizeof( complex<double> ) == 2UL*sizeof( double ) );
402 
403 #if defined(INTEL_MKL_VERSION)
404  BLAZE_STATIC_ASSERT( sizeof( MKL_INT ) == sizeof( int ) );
405  using ET = MKL_Complex16;
406 #else
407  using ET = double;
408 #endif
409 
410  zgesvd_( &jobu, &jobv, &m, &n, reinterpret_cast<ET*>( A ), &lda, s,
411  reinterpret_cast<ET*>( U ), &ldu, reinterpret_cast<ET*>( V ), &ldv,
412  reinterpret_cast<ET*>( work ), &lwork, rwork, info );
413 }
414 //*************************************************************************************************
415 
416 } // namespace blaze
417 
418 #endif
void gesvd(char jobu, char jobv, int m, int n, float *A, int lda, float *s, float *U, int ldu, float *V, int ldv, float *work, int lwork, int *info)
LAPACK kernel for the singular value decomposition (SVD) of the given dense general single precision ...
Definition: gesvd.h:163
Namespace of the Blaze C++ math library.
Definition: Blaze.h:58
Compile time assertion.
Header file for the complex data type.
#define BLAZE_STATIC_ASSERT(expr)
Compile time assertion macro.In case of an invalid compile time expression, a compilation error is cr...
Definition: StaticAssert.h:112