LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dspev_work()

lapack_int LAPACKE_dspev_work ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
double *  ap,
double *  w,
double *  z,
lapack_int  ldz,
double *  work 
)

Definition at line 36 of file lapacke_dspev_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dspev( &jobz, &uplo, &n, ap, w, z, &ldz, work, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int ldz_t = MAX(1,n);
49  double* z_t = NULL;
50  double* ap_t = NULL;
51  /* Check leading dimension(s) */
52  if( ldz < n ) {
53  info = -8;
54  LAPACKE_xerbla( "LAPACKE_dspev_work", info );
55  return info;
56  }
57  /* Allocate memory for temporary array(s) */
58  if( LAPACKE_lsame( jobz, 'v' ) ) {
59  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
60  if( z_t == NULL ) {
62  goto exit_level_0;
63  }
64  }
65  ap_t = (double*)
66  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
67  if( ap_t == NULL ) {
69  goto exit_level_1;
70  }
71  /* Transpose input matrices */
72  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
73  /* Call LAPACK function and adjust info */
74  LAPACK_dspev( &jobz, &uplo, &n, ap_t, w, z_t, &ldz_t, work, &info );
75  if( info < 0 ) {
76  info = info - 1;
77  }
78  /* Transpose output matrices */
79  if( LAPACKE_lsame( jobz, 'v' ) ) {
80  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
81  }
82  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
83  /* Release memory and exit */
84  LAPACKE_free( ap_t );
85 exit_level_1:
86  if( LAPACKE_lsame( jobz, 'v' ) ) {
87  LAPACKE_free( z_t );
88  }
89 exit_level_0:
90  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
91  LAPACKE_xerbla( "LAPACKE_dspev_work", info );
92  }
93  } else {
94  info = -1;
95  LAPACKE_xerbla( "LAPACKE_dspev_work", info );
96  }
97  return info;
98 }
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
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
void LAPACK_dspev(char *jobz, char *uplo, lapack_int *n, double *ap, double *w, double *z, lapack_int *ldz, double *work, lapack_int *info)
#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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