LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgesdd()

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

Definition at line 36 of file lapacke_sgesdd.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  lapack_int* iwork = NULL;
44  float* work = NULL;
45  float work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_sgesdd", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_sge_nancheck( matrix_layout, m, n, a, lda ) ) {
53  return -5;
54  }
55 #endif
56  /* Allocate memory for working array(s) */
57  iwork = (lapack_int*)
58  LAPACKE_malloc( sizeof(lapack_int) * MAX(1,8*MIN(m,n)) );
59  if( iwork == NULL ) {
61  goto exit_level_0;
62  }
63  /* Query optimal working array(s) size */
64  info = LAPACKE_sgesdd_work( matrix_layout, jobz, m, n, a, lda, s, u, ldu, vt,
65  ldvt, &work_query, lwork, iwork );
66  if( info != 0 ) {
67  goto exit_level_1;
68  }
69  lwork = (lapack_int)work_query;
70  /* Allocate memory for work arrays */
71  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
72  if( work == NULL ) {
74  goto exit_level_1;
75  }
76  /* Call middle-level interface */
77  info = LAPACKE_sgesdd_work( matrix_layout, jobz, m, n, a, lda, s, u, ldu, vt,
78  ldvt, work, lwork, iwork );
79  /* Release memory and exit */
80  LAPACKE_free( work );
81 exit_level_1:
82  LAPACKE_free( iwork );
83 exit_level_0:
84  if( info == LAPACK_WORK_MEMORY_ERROR ) {
85  LAPACKE_xerbla( "LAPACKE_sgesdd", info );
86  }
87  return info;
88 }
#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
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
#define MIN(x, y)
Definition: lapacke_utils.h:50
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
lapack_int LAPACKE_sgesdd_work(int matrix_layout, char jobz, lapack_int m, lapack_int n, float *a, lapack_int lda, float *s, float *u, lapack_int ldu, float *vt, lapack_int ldvt, float *work, lapack_int lwork, lapack_int *iwork)
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