LAPACK  3.7.1
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  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_ssb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
53  return -7;
54  }
55  if( LAPACKE_s_nancheck( 1, &abstol, 1 ) ) {
56  return -15;
57  }
58  if( LAPACKE_lsame( range, 'v' ) ) {
59  if( LAPACKE_s_nancheck( 1, &vl, 1 ) ) {
60  return -11;
61  }
62  }
63  if( LAPACKE_lsame( range, 'v' ) ) {
64  if( LAPACKE_s_nancheck( 1, &vu, 1 ) ) {
65  return -12;
66  }
67  }
68 #endif
69  /* Allocate memory for working array(s) */
70  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,5*n) );
71  if( iwork == NULL ) {
73  goto exit_level_0;
74  }
75  work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,7*n) );
76  if( work == NULL ) {
78  goto exit_level_1;
79  }
80  /* Call middle-level interface */
81  info = LAPACKE_ssbevx_work( matrix_layout, jobz, range, uplo, n, kd, ab,
82  ldab, q, ldq, vl, vu, il, iu, abstol, m, w, z,
83  ldz, work, iwork, ifail );
84  /* Release memory and exit */
85  LAPACKE_free( work );
86 exit_level_1:
87  LAPACKE_free( iwork );
88 exit_level_0:
89  if( info == LAPACK_WORK_MEMORY_ERROR ) {
90  LAPACKE_xerbla( "LAPACKE_ssbevx", info );
91  }
92  return info;
93 }
#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)
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