LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sbdsdc()

lapack_int LAPACKE_sbdsdc ( int  matrix_layout,
char  uplo,
char  compq,
lapack_int  n,
float *  d,
float *  e,
float *  u,
lapack_int  ldu,
float *  vt,
lapack_int  ldvt,
float *  q,
lapack_int iq 
)

Definition at line 36 of file lapacke_sbdsdc.c.

40 {
41  lapack_int info = 0;
42  /* Additional scalars declarations for work arrays */
43  size_t lwork;
44  lapack_int* iwork = NULL;
45  float* work = NULL;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_sbdsdc", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_s_nancheck( n, d, 1 ) ) {
53  return -5;
54  }
55  if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
56  return -6;
57  }
58 #endif
59  /* Additional scalars initializations for work arrays */
60  if( LAPACKE_lsame( compq, 'i' ) ) {
61  lwork = (size_t)3*MAX(1,n)*MAX(1,n)+4*MAX(1,n);
62  } else if( LAPACKE_lsame( compq, 'p' ) ) {
63  lwork = MAX(1,6*n);
64  } else if( LAPACKE_lsame( compq, 'n' ) ) {
65  lwork = MAX(1,4*n);
66  } else {
67  lwork = 1; /* Any value */
68  }
69  /* Allocate memory for working array(s) */
70  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,8*n) );
71  if( iwork == NULL ) {
73  goto exit_level_0;
74  }
75  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
76  if( work == NULL ) {
78  goto exit_level_1;
79  }
80  /* Call middle-level interface */
81  info = LAPACKE_sbdsdc_work( matrix_layout, uplo, compq, n, d, e, u, ldu, vt,
82  ldvt, q, iq, work, iwork );
83  /* Release memory and exit */
84  LAPACKE_free( work );
85 exit_level_1:
86  LAPACKE_free( iwork );
87 exit_level_0:
88  if( info == LAPACK_WORK_MEMORY_ERROR ) {
89  LAPACKE_xerbla( "LAPACKE_sbdsdc", info );
90  }
91  return info;
92 }
lapack_int LAPACKE_sbdsdc_work(int matrix_layout, char uplo, char compq, lapack_int n, float *d, float *e, float *u, lapack_int ldu, float *vt, lapack_int ldvt, float *q, lapack_int *iq, float *work, lapack_int *iwork)
#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_s_nancheck(lapack_int n, const float *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
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