LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_chetrd()

lapack_int LAPACKE_chetrd ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  d,
float *  e,
lapack_complex_float tau 
)

Definition at line 36 of file lapacke_chetrd.c.

39 {
40  lapack_int info = 0;
41  lapack_int lwork = -1;
42  lapack_complex_float* work = NULL;
43  lapack_complex_float work_query;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_chetrd", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  /* Optionally check input matrices for NaNs */
50  if( LAPACKE_che_nancheck( matrix_layout, uplo, n, a, lda ) ) {
51  return -4;
52  }
53 #endif
54  /* Query optimal working array(s) size */
55  info = LAPACKE_chetrd_work( matrix_layout, uplo, n, a, lda, d, e, tau,
56  &work_query, lwork );
57  if( info != 0 ) {
58  goto exit_level_0;
59  }
60  lwork = LAPACK_C2INT( work_query );
61  /* Allocate memory for work arrays */
62  work = (lapack_complex_float*)
63  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
64  if( work == NULL ) {
66  goto exit_level_0;
67  }
68  /* Call middle-level interface */
69  info = LAPACKE_chetrd_work( matrix_layout, uplo, n, a, lda, d, e, tau, work,
70  lwork );
71  /* Release memory and exit */
72  LAPACKE_free( work );
73 exit_level_0:
74  if( info == LAPACK_WORK_MEMORY_ERROR ) {
75  LAPACKE_xerbla( "LAPACKE_chetrd", info );
76  }
77  return info;
78 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_C2INT(x)
Definition: lapacke.h:116
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_che_nancheck(int matrix_layout, char uplo, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define lapack_int
Definition: lapacke.h:47
lapack_int LAPACKE_chetrd_work(int matrix_layout, char uplo, lapack_int n, lapack_complex_float *a, lapack_int lda, float *d, float *e, lapack_complex_float *tau, lapack_complex_float *work, lapack_int lwork)
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