LAPACK  3.10.0
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 35 of file lapacke_dspgvd_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_dspgvd( &itype, &jobz, &uplo, &n, ap, bp, w, z, &ldz, work,
45  &lwork, iwork, &liwork, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int ldz_t = MAX(1,n);
51  double* z_t = NULL;
52  double* ap_t = NULL;
53  double* bp_t = NULL;
54  /* Check leading dimension(s) */
55  if( ldz < n ) {
56  info = -10;
57  LAPACKE_xerbla( "LAPACKE_dspgvd_work", info );
58  return info;
59  }
60  /* Query optimal working array(s) size if requested */
61  if( liwork == -1 || lwork == -1 ) {
62  LAPACK_dspgvd( &itype, &jobz, &uplo, &n, ap, bp, w, z, &ldz_t, work,
63  &lwork, iwork, &liwork, &info );
64  return (info < 0) ? (info - 1) : info;
65  }
66  /* Allocate memory for temporary array(s) */
67  if( LAPACKE_lsame( jobz, 'v' ) ) {
68  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
69  if( z_t == NULL ) {
71  goto exit_level_0;
72  }
73  }
74  ap_t = (double*)
75  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
76  if( ap_t == NULL ) {
78  goto exit_level_1;
79  }
80  bp_t = (double*)
81  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
82  if( bp_t == NULL ) {
84  goto exit_level_2;
85  }
86  /* Transpose input matrices */
87  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
88  LAPACKE_dsp_trans( matrix_layout, uplo, n, bp, bp_t );
89  /* Call LAPACK function and adjust info */
90  LAPACK_dspgvd( &itype, &jobz, &uplo, &n, ap_t, bp_t, w, z_t, &ldz_t,
91  work, &lwork, iwork, &liwork, &info );
92  if( info < 0 ) {
93  info = info - 1;
94  }
95  /* Transpose output matrices */
96  if( LAPACKE_lsame( jobz, 'v' ) ) {
97  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
98  }
99  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
100  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, bp_t, bp );
101  /* Release memory and exit */
102  LAPACKE_free( bp_t );
103 exit_level_2:
104  LAPACKE_free( ap_t );
105 exit_level_1:
106  if( LAPACKE_lsame( jobz, 'v' ) ) {
107  LAPACKE_free( z_t );
108  }
109 exit_level_0:
110  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
111  LAPACKE_xerbla( "LAPACKE_dspgvd_work", info );
112  }
113  } else {
114  info = -1;
115  LAPACKE_xerbla( "LAPACKE_dspgvd_work", info );
116  }
117  return info;
118 }
#define LAPACK_dspgvd(...)
Definition: lapack.h:15507
#define lapack_int
Definition: lapack.h:83
#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
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACKE_dsp_trans(int matrix_layout, char uplo, lapack_int n, const double *in, double *out)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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