LAPACK  3.6.1 LAPACK: Linear Algebra PACKage
 lapack_int LAPACKE_sgehrd_work ( int matrix_layout, lapack_int n, lapack_int ilo, lapack_int ihi, float * a, lapack_int lda, float * tau, float * work, lapack_int lwork )

Definition at line 36 of file lapacke_sgehrd_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_sgehrd( &n, &ilo, &ihi, a, &lda, tau, work, &lwork, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int lda_t = MAX(1,n);
49  float* a_t = NULL;
50  /* Check leading dimension(s) */
51  if( lda < n ) {
52  info = -6;
53  LAPACKE_xerbla( "LAPACKE_sgehrd_work", info );
54  return info;
55  }
56  /* Query optimal working array(s) size if requested */
57  if( lwork == -1 ) {
58  LAPACK_sgehrd( &n, &ilo, &ihi, a, &lda_t, tau, work, &lwork,
59  &info );
60  return (info < 0) ? (info - 1) : info;
61  }
62  /* Allocate memory for temporary array(s) */
63  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
64  if( a_t == NULL ) {
66  goto exit_level_0;
67  }
68  /* Transpose input matrices */
69  LAPACKE_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
70  /* Call LAPACK function and adjust info */
71  LAPACK_sgehrd( &n, &ilo, &ihi, a_t, &lda_t, tau, work, &lwork, &info );
72  if( info < 0 ) {
73  info = info - 1;
74  }
75  /* Transpose output matrices */
76  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
77  /* Release memory and exit */
78  LAPACKE_free( a_t );
79 exit_level_0:
80  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
81  LAPACKE_xerbla( "LAPACKE_sgehrd_work", info );
82  }
83  } else {
84  info = -1;
85  LAPACKE_xerbla( "LAPACKE_sgehrd_work", info );
86  }
87  return info;
88 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_free(p)
Definition: lapacke.h:113
#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)
void LAPACK_sgehrd(lapack_int *n, lapack_int *ilo, lapack_int *ihi, float *a, lapack_int *lda, float *tau, float *work, lapack_int *lwork, lapack_int *info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123

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