LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsptrd_work()

lapack_int LAPACKE_dsptrd_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
double *  ap,
double *  d,
double *  e,
double *  tau 
)

Definition at line 36 of file lapacke_dsptrd_work.c.

38 {
39  lapack_int info = 0;
40  if( matrix_layout == LAPACK_COL_MAJOR ) {
41  /* Call LAPACK function and adjust info */
42  LAPACK_dsptrd( &uplo, &n, ap, d, e, tau, &info );
43  if( info < 0 ) {
44  info = info - 1;
45  }
46  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47  double* ap_t = NULL;
48  /* Allocate memory for temporary array(s) */
49  ap_t = (double*)
50  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
51  if( ap_t == NULL ) {
53  goto exit_level_0;
54  }
55  /* Transpose input matrices */
56  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
57  /* Call LAPACK function and adjust info */
58  LAPACK_dsptrd( &uplo, &n, ap_t, d, e, tau, &info );
59  if( info < 0 ) {
60  info = info - 1;
61  }
62  /* Transpose output matrices */
63  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
64  /* Release memory and exit */
65  LAPACKE_free( ap_t );
66 exit_level_0:
67  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
68  LAPACKE_xerbla( "LAPACKE_dsptrd_work", info );
69  }
70  } else {
71  info = -1;
72  LAPACKE_xerbla( "LAPACKE_dsptrd_work", info );
73  }
74  return info;
75 }
#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
#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
void LAPACK_dsptrd(char *uplo, lapack_int *n, double *ap, double *d, double *e, double *tau, lapack_int *info)
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