LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sstemr()

lapack_int LAPACKE_sstemr ( int  matrix_layout,
char  jobz,
char  range,
lapack_int  n,
float *  d,
float *  e,
float  vl,
float  vu,
lapack_int  il,
lapack_int  iu,
lapack_int m,
float *  w,
float *  z,
lapack_int  ldz,
lapack_int  nzc,
lapack_int isuppz,
lapack_logical tryrac 
)

Definition at line 36 of file lapacke_sstemr.c.

41 {
42  lapack_int info = 0;
43  lapack_int liwork = -1;
44  lapack_int lwork = -1;
45  lapack_int* iwork = NULL;
46  float* work = NULL;
47  lapack_int iwork_query;
48  float work_query;
49  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
50  LAPACKE_xerbla( "LAPACKE_sstemr", -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 -5;
58  }
59  if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
60  return -6;
61  }
62  if( LAPACKE_s_nancheck( 1, &vl, 1 ) ) {
63  return -7;
64  }
65  if( LAPACKE_s_nancheck( 1, &vu, 1 ) ) {
66  return -8;
67  }
68  }
69 #endif
70  /* Query optimal working array(s) size */
71  info = LAPACKE_sstemr_work( matrix_layout, jobz, range, n, d, e, vl, vu, il,
72  iu, m, w, z, ldz, nzc, isuppz, tryrac,
73  &work_query, lwork, &iwork_query, liwork );
74  if( info != 0 ) {
75  goto exit_level_0;
76  }
77  liwork = (lapack_int)iwork_query;
78  lwork = (lapack_int)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  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
86  if( work == NULL ) {
88  goto exit_level_1;
89  }
90  /* Call middle-level interface */
91  info = LAPACKE_sstemr_work( matrix_layout, jobz, range, n, d, e, vl, vu, il,
92  iu, m, w, z, ldz, nzc, isuppz, tryrac, work,
93  lwork, iwork, liwork );
94  /* Release memory and exit */
95  LAPACKE_free( work );
96 exit_level_1:
97  LAPACKE_free( iwork );
98 exit_level_0:
99  if( info == LAPACK_WORK_MEMORY_ERROR ) {
100  LAPACKE_xerbla( "LAPACKE_sstemr", info );
101  }
102  return info;
103 }
lapack_int LAPACKE_sstemr_work(int matrix_layout, char jobz, char range, lapack_int n, float *d, float *e, float vl, float vu, lapack_int il, lapack_int iu, lapack_int *m, float *w, float *z, lapack_int ldz, lapack_int nzc, lapack_int *isuppz, lapack_logical *tryrac, float *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
#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 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
int LAPACKE_get_nancheck()
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