LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgesdd()

lapack_int LAPACKE_cgesdd ( int  matrix_layout,
char  jobz,
lapack_int  m,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  s,
lapack_complex_float u,
lapack_int  ldu,
lapack_complex_float vt,
lapack_int  ldvt 
)

Definition at line 35 of file lapacke_cgesdd.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  /* Additional scalars declarations for work arrays */
44  size_t lrwork;
45  lapack_int* iwork = NULL;
46  float* rwork = NULL;
47  lapack_complex_float* work = NULL;
48  lapack_complex_float work_query;
49  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
50  LAPACKE_xerbla( "LAPACKE_cgesdd", -1 );
51  return -1;
52  }
53 #ifndef LAPACK_DISABLE_NAN_CHECK
54  if( LAPACKE_get_nancheck() ) {
55  /* Optionally check input matrices for NaNs */
56  if( LAPACKE_cge_nancheck( matrix_layout, m, n, a, lda ) ) {
57  return -5;
58  }
59  }
60 #endif
61  /* Additional scalars initializations for work arrays */
62  if( LAPACKE_lsame( jobz, 'n' ) ) {
63  lrwork = MAX(1,7*MIN(m,n));
64  } else {
65  lrwork = (size_t)MAX(1,MIN(m,n)*MAX(5*MIN(m,n)+7,2*MAX(m,n)+2*MIN(m,n)+1));
66  }
67  /* Allocate memory for working array(s) */
68  iwork = (lapack_int*)
69  LAPACKE_malloc( sizeof(lapack_int) * MAX(1,8*MIN(m,n)) );
70  if( iwork == NULL ) {
72  goto exit_level_0;
73  }
74  rwork = (float*)LAPACKE_malloc( sizeof(float) * lrwork );
75  if( rwork == NULL ) {
77  goto exit_level_1;
78  }
79  /* Query optimal working array(s) size */
80  info = LAPACKE_cgesdd_work( matrix_layout, jobz, m, n, a, lda, s, u, ldu, vt,
81  ldvt, &work_query, lwork, rwork, iwork );
82  if( info != 0 ) {
83  goto exit_level_2;
84  }
85  lwork = LAPACK_C2INT( work_query );
86  /* Allocate memory for work arrays */
87  work = (lapack_complex_float*)
88  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
89  if( work == NULL ) {
91  goto exit_level_2;
92  }
93  /* Call middle-level interface */
94  info = LAPACKE_cgesdd_work( matrix_layout, jobz, m, n, a, lda, s, u, ldu, vt,
95  ldvt, work, lwork, rwork, iwork );
96  /* Release memory and exit */
97  LAPACKE_free( work );
98 exit_level_2:
99  LAPACKE_free( rwork );
100 exit_level_1:
101  LAPACKE_free( iwork );
102 exit_level_0:
103  if( info == LAPACK_WORK_MEMORY_ERROR ) {
104  LAPACKE_xerbla( "LAPACKE_cgesdd", info );
105  }
106  return info;
107 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_float
Definition: lapack.h:45
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACK_C2INT(x)
Definition: lapacke.h:49
#define LAPACKE_free(p)
Definition: lapacke.h:46
lapack_int LAPACKE_cgesdd_work(int matrix_layout, char jobz, lapack_int m, lapack_int n, lapack_complex_float *a, lapack_int lda, float *s, lapack_complex_float *u, lapack_int ldu, lapack_complex_float *vt, lapack_int ldvt, lapack_complex_float *work, lapack_int lwork, float *rwork, lapack_int *iwork)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MIN(x, y)
Definition: lapacke_utils.h:49
#define MAX(x, y)
Definition: lapacke_utils.h:46
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
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