LAPACK  3.7.1
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  /* Optionally check input matrices for NaNs */
55  if( LAPACKE_s_nancheck( n, d, 1 ) ) {
56  return -4;
57  }
58  if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
59  return -5;
60  }
61  if( LAPACKE_lsame( compz, 'v' ) ) {
62  if( LAPACKE_cge_nancheck( matrix_layout, n, n, z, ldz ) ) {
63  return -6;
64  }
65  }
66 #endif
67  /* Query optimal working array(s) size */
68  info = LAPACKE_cstedc_work( matrix_layout, compz, n, d, e, z, ldz,
69  &work_query, lwork, &rwork_query, lrwork,
70  &iwork_query, liwork );
71  if( info != 0 ) {
72  goto exit_level_0;
73  }
74  liwork = (lapack_int)iwork_query;
75  lrwork = (lapack_int)rwork_query;
76  lwork = LAPACK_C2INT( work_query );
77  /* Allocate memory for work arrays */
78  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
79  if( iwork == NULL ) {
81  goto exit_level_0;
82  }
83  rwork = (float*)LAPACKE_malloc( sizeof(float) * lrwork );
84  if( rwork == NULL ) {
86  goto exit_level_1;
87  }
88  work = (lapack_complex_float*)
89  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
90  if( work == NULL ) {
92  goto exit_level_2;
93  }
94  /* Call middle-level interface */
95  info = LAPACKE_cstedc_work( matrix_layout, compz, n, d, e, z, ldz, work,
96  lwork, rwork, lrwork, iwork, liwork );
97  /* Release memory and exit */
98  LAPACKE_free( work );
99 exit_level_2:
100  LAPACKE_free( rwork );
101 exit_level_1:
102  LAPACKE_free( iwork );
103 exit_level_0:
104  if( info == LAPACK_WORK_MEMORY_ERROR ) {
105  LAPACKE_xerbla( "LAPACKE_cstedc", info );
106  }
107  return info;
108 }
#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
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define LAPACKE_malloc(size)
Definition: lapacke.h: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_C2INT(x)
Definition: lapacke.h:116
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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