LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgebrd_work()

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 
)

Definition at line 36 of file lapacke_cgebrd_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_cgebrd( &m, &n, a, &lda, d, e, tauq, taup, work, &lwork, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int lda_t = MAX(1,m);
51  lapack_complex_float* a_t = NULL;
52  /* Check leading dimension(s) */
53  if( lda < n ) {
54  info = -5;
55  LAPACKE_xerbla( "LAPACKE_cgebrd_work", info );
56  return info;
57  }
58  /* Query optimal working array(s) size if requested */
59  if( lwork == -1 ) {
60  LAPACK_cgebrd( &m, &n, a, &lda_t, d, e, tauq, taup, work, &lwork,
61  &info );
62  return (info < 0) ? (info - 1) : info;
63  }
64  /* Allocate memory for temporary array(s) */
65  a_t = (lapack_complex_float*)
66  LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
67  if( a_t == NULL ) {
69  goto exit_level_0;
70  }
71  /* Transpose input matrices */
72  LAPACKE_cge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
73  /* Call LAPACK function and adjust info */
74  LAPACK_cgebrd( &m, &n, a_t, &lda_t, d, e, tauq, taup, work, &lwork,
75  &info );
76  if( info < 0 ) {
77  info = info - 1;
78  }
79  /* Transpose output matrices */
80  LAPACKE_cge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
81  /* Release memory and exit */
82  LAPACKE_free( a_t );
83 exit_level_0:
84  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
85  LAPACKE_xerbla( "LAPACKE_cgebrd_work", info );
86  }
87  } else {
88  info = -1;
89  LAPACKE_xerbla( "LAPACKE_cgebrd_work", info );
90  }
91  return info;
92 }
void LAPACK_cgebrd(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, lapack_int *info)
void LAPACKE_cge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
#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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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