LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssbev_work()

lapack_int LAPACKE_ssbev_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 
)

Definition at line 35 of file lapacke_ssbev_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_ssbev( &jobz, &uplo, &n, &kd, ab, &ldab, w, z, &ldz, work,
44  &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldab_t = MAX(1,kd+1);
50  lapack_int ldz_t = MAX(1,n);
51  float* ab_t = NULL;
52  float* z_t = NULL;
53  /* Check leading dimension(s) */
54  if( ldab < n ) {
55  info = -7;
56  LAPACKE_xerbla( "LAPACKE_ssbev_work", info );
57  return info;
58  }
59  if( ldz < n ) {
60  info = -10;
61  LAPACKE_xerbla( "LAPACKE_ssbev_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
66  if( ab_t == NULL ) {
68  goto exit_level_0;
69  }
70  if( LAPACKE_lsame( jobz, 'v' ) ) {
71  z_t = (float*)LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,n) );
72  if( z_t == NULL ) {
74  goto exit_level_1;
75  }
76  }
77  /* Transpose input matrices */
78  LAPACKE_ssb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
79  /* Call LAPACK function and adjust info */
80  LAPACK_ssbev( &jobz, &uplo, &n, &kd, ab_t, &ldab_t, w, z_t, &ldz_t,
81  work, &info );
82  if( info < 0 ) {
83  info = info - 1;
84  }
85  /* Transpose output matrices */
86  LAPACKE_ssb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
87  ldab );
88  if( LAPACKE_lsame( jobz, 'v' ) ) {
89  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
90  }
91  /* Release memory and exit */
92  if( LAPACKE_lsame( jobz, 'v' ) ) {
93  LAPACKE_free( z_t );
94  }
95 exit_level_1:
96  LAPACKE_free( ab_t );
97 exit_level_0:
98  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
99  LAPACKE_xerbla( "LAPACKE_ssbev_work", info );
100  }
101  } else {
102  info = -1;
103  LAPACKE_xerbla( "LAPACKE_ssbev_work", info );
104  }
105  return info;
106 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_ssbev(...)
Definition: lapack.h:14750
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
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)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
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:46
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