LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgebrd()

lapack_int LAPACKE_cgebrd ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  d,
float *  e,
lapack_complex_float tauq,
lapack_complex_float taup 
)

Definition at line 35 of file lapacke_cgebrd.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_cgebrd", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  if( LAPACKE_get_nancheck() ) {
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_cge_nancheck( matrix_layout, m, n, a, lda ) ) {
52  return -4;
53  }
54  }
55 #endif
56  /* Query optimal working array(s) size */
57  info = LAPACKE_cgebrd_work( matrix_layout, m, n, a, lda, d, e, tauq, taup,
58  &work_query, lwork );
59  if( info != 0 ) {
60  goto exit_level_0;
61  }
62  lwork = LAPACK_C2INT( work_query );
63  /* Allocate memory for work arrays */
64  work = (lapack_complex_float*)
65  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
66  if( work == NULL ) {
68  goto exit_level_0;
69  }
70  /* Call middle-level interface */
71  info = LAPACKE_cgebrd_work( matrix_layout, m, n, a, lda, d, e, tauq, taup,
72  work, lwork );
73  /* Release memory and exit */
74  LAPACKE_free( work );
75 exit_level_0:
76  if( info == LAPACK_WORK_MEMORY_ERROR ) {
77  LAPACKE_xerbla( "LAPACKE_cgebrd", info );
78  }
79  return info;
80 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_float
Definition: lapack.h:45
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
lapack_int LAPACKE_cgebrd_work(int matrix_layout, lapack_int m, lapack_int n, lapack_complex_float *a, lapack_int lda, float *d, float *e, lapack_complex_float *tauq, lapack_complex_float *taup, lapack_complex_float *work, lapack_int lwork)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACK_C2INT(x)
Definition: lapacke.h:49
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
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