LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssygvd_work()

lapack_int LAPACKE_ssygvd_work ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
float *  a,
lapack_int  lda,
float *  b,
lapack_int  ldb,
float *  w,
float *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_ssygvd_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_ssygvd( &itype, &jobz, &uplo, &n, a, &lda, b, &ldb, w, 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 lda_t = MAX(1,n);
52  lapack_int ldb_t = MAX(1,n);
53  float* a_t = NULL;
54  float* b_t = NULL;
55  /* Check leading dimension(s) */
56  if( lda < n ) {
57  info = -7;
58  LAPACKE_xerbla( "LAPACKE_ssygvd_work", info );
59  return info;
60  }
61  if( ldb < n ) {
62  info = -9;
63  LAPACKE_xerbla( "LAPACKE_ssygvd_work", info );
64  return info;
65  }
66  /* Query optimal working array(s) size if requested */
67  if( liwork == -1 || lwork == -1 ) {
68  LAPACK_ssygvd( &itype, &jobz, &uplo, &n, a, &lda_t, b, &ldb_t, w,
69  work, &lwork, iwork, &liwork, &info );
70  return (info < 0) ? (info - 1) : info;
71  }
72  /* Allocate memory for temporary array(s) */
73  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
74  if( a_t == NULL ) {
76  goto exit_level_0;
77  }
78  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,n) );
79  if( b_t == NULL ) {
81  goto exit_level_1;
82  }
83  /* Transpose input matrices */
84  LAPACKE_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
85  LAPACKE_sge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
86  /* Call LAPACK function and adjust info */
87  LAPACK_ssygvd( &itype, &jobz, &uplo, &n, a_t, &lda_t, b_t, &ldb_t, w,
88  work, &lwork, iwork, &liwork, &info );
89  if( info < 0 ) {
90  info = info - 1;
91  }
92  /* Transpose output matrices */
93  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
94  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
95  /* Release memory and exit */
96  LAPACKE_free( b_t );
97 exit_level_1:
98  LAPACKE_free( a_t );
99 exit_level_0:
100  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
101  LAPACKE_xerbla( "LAPACKE_ssygvd_work", info );
102  }
103  } else {
104  info = -1;
105  LAPACKE_xerbla( "LAPACKE_ssygvd_work", info );
106  }
107  return info;
108 }
#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
#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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
void LAPACK_ssygvd(lapack_int *itype, char *jobz, char *uplo, lapack_int *n, float *a, lapack_int *lda, float *b, lapack_int *ldb, float *w, float *work, lapack_int *lwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)
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