LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dspgvd_work()

lapack_int LAPACKE_dspgvd_work ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
double *  ap,
double *  bp,
double *  w,
double *  z,
lapack_int  ldz,
double *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_dspgvd_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_dspgvd( &itype, &jobz, &uplo, &n, ap, bp, 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 ldz_t = MAX(1,n);
52  double* z_t = NULL;
53  double* ap_t = NULL;
54  double* bp_t = NULL;
55  /* Check leading dimension(s) */
56  if( ldz < n ) {
57  info = -10;
58  LAPACKE_xerbla( "LAPACKE_dspgvd_work", info );
59  return info;
60  }
61  /* Query optimal working array(s) size if requested */
62  if( liwork == -1 || lwork == -1 ) {
63  LAPACK_dspgvd( &itype, &jobz, &uplo, &n, ap, bp, w, z, &ldz_t, work,
64  &lwork, iwork, &liwork, &info );
65  return (info < 0) ? (info - 1) : info;
66  }
67  /* Allocate memory for temporary array(s) */
68  if( LAPACKE_lsame( jobz, 'v' ) ) {
69  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
70  if( z_t == NULL ) {
72  goto exit_level_0;
73  }
74  }
75  ap_t = (double*)
76  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
77  if( ap_t == NULL ) {
79  goto exit_level_1;
80  }
81  bp_t = (double*)
82  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
83  if( bp_t == NULL ) {
85  goto exit_level_2;
86  }
87  /* Transpose input matrices */
88  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
89  LAPACKE_dsp_trans( matrix_layout, uplo, n, bp, bp_t );
90  /* Call LAPACK function and adjust info */
91  LAPACK_dspgvd( &itype, &jobz, &uplo, &n, ap_t, bp_t, w, z_t, &ldz_t,
92  work, &lwork, iwork, &liwork, &info );
93  if( info < 0 ) {
94  info = info - 1;
95  }
96  /* Transpose output matrices */
97  if( LAPACKE_lsame( jobz, 'v' ) ) {
98  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
99  }
100  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
101  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, bp_t, bp );
102  /* Release memory and exit */
103  LAPACKE_free( bp_t );
104 exit_level_2:
105  LAPACKE_free( ap_t );
106 exit_level_1:
107  if( LAPACKE_lsame( jobz, 'v' ) ) {
108  LAPACKE_free( z_t );
109  }
110 exit_level_0:
111  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
112  LAPACKE_xerbla( "LAPACKE_dspgvd_work", info );
113  }
114  } else {
115  info = -1;
116  LAPACKE_xerbla( "LAPACKE_dspgvd_work", info );
117  }
118  return info;
119 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
void LAPACK_dspgvd(lapack_int *itype, char *jobz, char *uplo, lapack_int *n, double *ap, double *bp, double *w, double *z, lapack_int *ldz, double *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
void LAPACKE_dsp_trans(int matrix_layout, char uplo, lapack_int n, const double *in, double *out)
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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