LAPACK  3.8.0
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 36 of file lapacke_cgesvd.c.

41 {
42  lapack_int info = 0;
43  lapack_int lwork = -1;
44  float* rwork = NULL;
45  lapack_complex_float* work = NULL;
46  lapack_complex_float work_query;
47  lapack_int i;
48  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49  LAPACKE_xerbla( "LAPACKE_cgesvd", -1 );
50  return -1;
51  }
52 #ifndef LAPACK_DISABLE_NAN_CHECK
53  if( LAPACKE_get_nancheck() ) {
54  /* Optionally check input matrices for NaNs */
55  if( LAPACKE_cge_nancheck( matrix_layout, m, n, a, lda ) ) {
56  return -6;
57  }
58  }
59 #endif
60  /* Allocate memory for working array(s) */
61  rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,5*MIN(m,n)) );
62  if( rwork == NULL ) {
64  goto exit_level_0;
65  }
66  /* Query optimal working array(s) size */
67  info = LAPACKE_cgesvd_work( matrix_layout, jobu, jobvt, m, n, a, lda, s, u,
68  ldu, vt, ldvt, &work_query, lwork, rwork );
69  if( info != 0 ) {
70  goto exit_level_1;
71  }
72  lwork = LAPACK_C2INT( work_query );
73  /* Allocate memory for work arrays */
74  work = (lapack_complex_float*)
75  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
76  if( work == NULL ) {
78  goto exit_level_1;
79  }
80  /* Call middle-level interface */
81  info = LAPACKE_cgesvd_work( matrix_layout, jobu, jobvt, m, n, a, lda, s, u,
82  ldu, vt, ldvt, work, lwork, rwork );
83  /* Backup significant data from working array(s) */
84  for( i=0; i<MIN(m,n)-1; i++ ) {
85  superb[i] = rwork[i];
86  }
87  /* Release memory and exit */
88  LAPACKE_free( work );
89 exit_level_1:
90  LAPACKE_free( rwork );
91 exit_level_0:
92  if( info == LAPACK_WORK_MEMORY_ERROR ) {
93  LAPACKE_xerbla( "LAPACKE_cgesvd", info );
94  }
95  return info;
96 }
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_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
#define MIN(x, y)
Definition: lapacke_utils.h:50
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_C2INT(x)
Definition: lapacke.h:116
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
int LAPACKE_get_nancheck()
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