LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dspgv_work()

lapack_int LAPACKE_dspgv_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 
)

Definition at line 36 of file lapacke_dspgv_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_dspgv( &itype, &jobz, &uplo, &n, ap, bp, w, z, &ldz, work,
45  &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_dspgv_work", info );
58  return info;
59  }
60  /* Allocate memory for temporary array(s) */
61  if( LAPACKE_lsame( jobz, 'v' ) ) {
62  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
63  if( z_t == NULL ) {
65  goto exit_level_0;
66  }
67  }
68  ap_t = (double*)
69  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
70  if( ap_t == NULL ) {
72  goto exit_level_1;
73  }
74  bp_t = (double*)
75  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
76  if( bp_t == NULL ) {
78  goto exit_level_2;
79  }
80  /* Transpose input matrices */
81  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
82  LAPACKE_dsp_trans( matrix_layout, uplo, n, bp, bp_t );
83  /* Call LAPACK function and adjust info */
84  LAPACK_dspgv( &itype, &jobz, &uplo, &n, ap_t, bp_t, w, z_t, &ldz_t,
85  work, &info );
86  if( info < 0 ) {
87  info = info - 1;
88  }
89  /* Transpose output matrices */
90  if( LAPACKE_lsame( jobz, 'v' ) ) {
91  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
92  }
93  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
94  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, bp_t, bp );
95  /* Release memory and exit */
96  LAPACKE_free( bp_t );
97 exit_level_2:
98  LAPACKE_free( ap_t );
99 exit_level_1:
100  if( LAPACKE_lsame( jobz, 'v' ) ) {
101  LAPACKE_free( z_t );
102  }
103 exit_level_0:
104  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
105  LAPACKE_xerbla( "LAPACKE_dspgv_work", info );
106  }
107  } else {
108  info = -1;
109  LAPACKE_xerbla( "LAPACKE_dspgv_work", info );
110  }
111  return info;
112 }
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
void LAPACK_dspgv(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 *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#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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