LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cstedc()

lapack_int LAPACKE_cstedc ( int  matrix_layout,
char  compz,
lapack_int  n,
float *  d,
float *  e,
lapack_complex_float z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_cstedc.c.

38 {
39  lapack_int info = 0;
40  lapack_int liwork = -1;
41  lapack_int lrwork = -1;
42  lapack_int lwork = -1;
43  lapack_int* iwork = NULL;
44  float* rwork = NULL;
45  lapack_complex_float* work = NULL;
46  lapack_int iwork_query;
47  float rwork_query;
48  lapack_complex_float work_query;
49  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
50  LAPACKE_xerbla( "LAPACKE_cstedc", -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_s_nancheck( n, d, 1 ) ) {
57  return -4;
58  }
59  if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
60  return -5;
61  }
62  if( LAPACKE_lsame( compz, 'v' ) ) {
63  if( LAPACKE_cge_nancheck( matrix_layout, n, n, z, ldz ) ) {
64  return -6;
65  }
66  }
67  }
68 #endif
69  /* Query optimal working array(s) size */
70  info = LAPACKE_cstedc_work( matrix_layout, compz, n, d, e, z, ldz,
71  &work_query, lwork, &rwork_query, lrwork,
72  &iwork_query, liwork );
73  if( info != 0 ) {
74  goto exit_level_0;
75  }
76  liwork = (lapack_int)iwork_query;
77  lrwork = (lapack_int)rwork_query;
78  lwork = LAPACK_C2INT( work_query );
79  /* Allocate memory for work arrays */
80  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
81  if( iwork == NULL ) {
83  goto exit_level_0;
84  }
85  rwork = (float*)LAPACKE_malloc( sizeof(float) * lrwork );
86  if( rwork == NULL ) {
88  goto exit_level_1;
89  }
90  work = (lapack_complex_float*)
91  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
92  if( work == NULL ) {
94  goto exit_level_2;
95  }
96  /* Call middle-level interface */
97  info = LAPACKE_cstedc_work( matrix_layout, compz, n, d, e, z, ldz, work,
98  lwork, rwork, lrwork, iwork, liwork );
99  /* Release memory and exit */
100  LAPACKE_free( work );
101 exit_level_2:
102  LAPACKE_free( rwork );
103 exit_level_1:
104  LAPACKE_free( iwork );
105 exit_level_0:
106  if( info == LAPACK_WORK_MEMORY_ERROR ) {
107  LAPACKE_xerbla( "LAPACKE_cstedc", info );
108  }
109  return info;
110 }
lapack_int LAPACKE_cstedc_work(int matrix_layout, char compz, lapack_int n, float *d, float *e, lapack_complex_float *z, lapack_int ldz, lapack_complex_float *work, lapack_int lwork, float *rwork, lapack_int lrwork, lapack_int *iwork, lapack_int liwork)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define lapack_complex_float
Definition: lapacke.h:74
int LAPACKE_get_nancheck()
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_xerbla(const char *name, lapack_int info)
#define LAPACK_C2INT(x)
Definition: lapacke.h:116
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