LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgesvd()

lapack_int LAPACKE_cgesvd ( int  matrix_layout,
char  jobu,
char  jobvt,
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,
float *  superb 
)

Definition at line 35 of file lapacke_cgesvd.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  float* rwork = NULL;
44  lapack_complex_float* work = NULL;
45  lapack_complex_float work_query;
46  lapack_int i;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_cgesvd", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_cge_nancheck( matrix_layout, m, n, a, lda ) ) {
55  return -6;
56  }
57  }
58 #endif
59  /* Allocate memory for working array(s) */
60  rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,5*MIN(m,n)) );
61  if( rwork == NULL ) {
63  goto exit_level_0;
64  }
65  /* Query optimal working array(s) size */
66  info = LAPACKE_cgesvd_work( matrix_layout, jobu, jobvt, m, n, a, lda, s, u,
67  ldu, vt, ldvt, &work_query, lwork, rwork );
68  if( info != 0 ) {
69  goto exit_level_1;
70  }
71  lwork = LAPACK_C2INT( work_query );
72  /* Allocate memory for work arrays */
73  work = (lapack_complex_float*)
74  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
75  if( work == NULL ) {
77  goto exit_level_1;
78  }
79  /* Call middle-level interface */
80  info = LAPACKE_cgesvd_work( matrix_layout, jobu, jobvt, m, n, a, lda, s, u,
81  ldu, vt, ldvt, work, lwork, rwork );
82  /* Backup significant data from working array(s) */
83  for( i=0; i<MIN(m,n)-1; i++ ) {
84  superb[i] = rwork[i];
85  }
86  /* Release memory and exit */
87  LAPACKE_free( work );
88 exit_level_1:
89  LAPACKE_free( rwork );
90 exit_level_0:
91  if( info == LAPACK_WORK_MEMORY_ERROR ) {
92  LAPACKE_xerbla( "LAPACKE_cgesvd", info );
93  }
94  return info;
95 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_float
Definition: lapack.h:45
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
lapack_int LAPACKE_cgesvd_work(int matrix_layout, char jobu, char jobvt, 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)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACK_C2INT(x)
Definition: lapacke.h:49
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
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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