LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssbevx()

lapack_int LAPACKE_ssbevx ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_int  kd,
float *  ab,
lapack_int  ldab,
float *  q,
lapack_int  ldq,
float  vl,
float  vu,
lapack_int  il,
lapack_int  iu,
float  abstol,
lapack_int m,
float *  w,
float *  z,
lapack_int  ldz,
lapack_int ifail 
)

Definition at line 36 of file lapacke_ssbevx.c.

42 {
43  lapack_int info = 0;
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_ssbevx", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_ssb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
54  return -7;
55  }
56  if( LAPACKE_s_nancheck( 1, &abstol, 1 ) ) {
57  return -15;
58  }
59  if( LAPACKE_lsame( range, 'v' ) ) {
60  if( LAPACKE_s_nancheck( 1, &vl, 1 ) ) {
61  return -11;
62  }
63  }
64  if( LAPACKE_lsame( range, 'v' ) ) {
65  if( LAPACKE_s_nancheck( 1, &vu, 1 ) ) {
66  return -12;
67  }
68  }
69  }
70 #endif
71  /* Allocate memory for working array(s) */
72  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,5*n) );
73  if( iwork == NULL ) {
75  goto exit_level_0;
76  }
77  work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,7*n) );
78  if( work == NULL ) {
80  goto exit_level_1;
81  }
82  /* Call middle-level interface */
83  info = LAPACKE_ssbevx_work( matrix_layout, jobz, range, uplo, n, kd, ab,
84  ldab, q, ldq, vl, vu, il, iu, abstol, m, w, z,
85  ldz, work, iwork, ifail );
86  /* Release memory and exit */
87  LAPACKE_free( work );
88 exit_level_1:
89  LAPACKE_free( iwork );
90 exit_level_0:
91  if( info == LAPACK_WORK_MEMORY_ERROR ) {
92  LAPACKE_xerbla( "LAPACKE_ssbevx", info );
93  }
94  return info;
95 }
#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)
lapack_logical LAPACKE_ssb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const float *ab, lapack_int ldab)
#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
lapack_int LAPACKE_ssbevx_work(int matrix_layout, char jobz, char range, char uplo, lapack_int n, lapack_int kd, float *ab, lapack_int ldab, float *q, lapack_int ldq, float vl, float vu, lapack_int il, lapack_int iu, float abstol, lapack_int *m, float *w, float *z, lapack_int ldz, float *work, lapack_int *iwork, lapack_int *ifail)
int LAPACKE_get_nancheck()
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