LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssbevd_work()

lapack_int LAPACKE_ssbevd_work ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  kd,
float *  ab,
lapack_int  ldab,
float *  w,
float *  z,
lapack_int  ldz,
float *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_ssbevd_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_ssbevd( &jobz, &uplo, &n, &kd, ab, &ldab, w, z, &ldz, work,
46  &lwork, iwork, &liwork, &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int ldab_t = MAX(1,kd+1);
52  lapack_int ldz_t = MAX(1,n);
53  float* ab_t = NULL;
54  float* z_t = NULL;
55  /* Check leading dimension(s) */
56  if( ldab < n ) {
57  info = -7;
58  LAPACKE_xerbla( "LAPACKE_ssbevd_work", info );
59  return info;
60  }
61  if( ldz < n ) {
62  info = -10;
63  LAPACKE_xerbla( "LAPACKE_ssbevd_work", info );
64  return info;
65  }
66  /* Query optimal working array(s) size if requested */
67  if( liwork == -1 || lwork == -1 ) {
68  LAPACK_ssbevd( &jobz, &uplo, &n, &kd, ab, &ldab_t, w, z, &ldz_t,
69  work, &lwork, iwork, &liwork, &info );
70  return (info < 0) ? (info - 1) : info;
71  }
72  /* Allocate memory for temporary array(s) */
73  ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
74  if( ab_t == NULL ) {
76  goto exit_level_0;
77  }
78  if( LAPACKE_lsame( jobz, 'v' ) ) {
79  z_t = (float*)LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,n) );
80  if( z_t == NULL ) {
82  goto exit_level_1;
83  }
84  }
85  /* Transpose input matrices */
86  LAPACKE_ssb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
87  /* Call LAPACK function and adjust info */
88  LAPACK_ssbevd( &jobz, &uplo, &n, &kd, ab_t, &ldab_t, w, z_t, &ldz_t,
89  work, &lwork, iwork, &liwork, &info );
90  if( info < 0 ) {
91  info = info - 1;
92  }
93  /* Transpose output matrices */
94  LAPACKE_ssb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
95  ldab );
96  if( LAPACKE_lsame( jobz, 'v' ) ) {
97  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
98  }
99  /* Release memory and exit */
100  if( LAPACKE_lsame( jobz, 'v' ) ) {
101  LAPACKE_free( z_t );
102  }
103 exit_level_1:
104  LAPACKE_free( ab_t );
105 exit_level_0:
106  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
107  LAPACKE_xerbla( "LAPACKE_ssbevd_work", info );
108  }
109  } else {
110  info = -1;
111  LAPACKE_xerbla( "LAPACKE_ssbevd_work", info );
112  }
113  return info;
114 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:47
void LAPACKE_ssb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const float *in, lapack_int ldin, float *out, lapack_int ldout)
void LAPACK_ssbevd(char *jobz, char *uplo, lapack_int *n, lapack_int *kd, float *ab, lapack_int *ldab, float *w, float *z, lapack_int *ldz, float *work, lapack_int *lwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)
#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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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