LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgeqrt_work()

lapack_int LAPACKE_zgeqrt_work ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_int  nb,
lapack_complex_double a,
lapack_int  lda,
lapack_complex_double t,
lapack_int  ldt,
lapack_complex_double work 
)

Definition at line 36 of file lapacke_zgeqrt_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_zgeqrt( &m, &n, &nb, a, &lda, t, &ldt, work, &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int lda_t = MAX(1,m);
50  lapack_int ldt_t = MAX(1,ldt);
51  lapack_complex_double* a_t = NULL;
52  lapack_complex_double* t_t = NULL;
53  /* Check leading dimension(s) */
54  if( lda < n ) {
55  info = -6;
56  LAPACKE_xerbla( "LAPACKE_zgeqrt_work", info );
57  return info;
58  }
59  if( ldt < MIN(m,n) ) {
60  info = -8;
61  LAPACKE_xerbla( "LAPACKE_zgeqrt_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  a_t = (lapack_complex_double*)
66  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
67  if( a_t == NULL ) {
69  goto exit_level_0;
70  }
71  t_t = (lapack_complex_double*)
73  ldt_t * MAX(1,MIN(m,n)) );
74  if( t_t == NULL ) {
76  goto exit_level_1;
77  }
78  /* Transpose input matrices */
79  LAPACKE_zge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
80  /* Call LAPACK function and adjust info */
81  LAPACK_zgeqrt( &m, &n, &nb, a_t, &lda_t, t_t, &ldt_t, work, &info );
82  if( info < 0 ) {
83  info = info - 1;
84  }
85  /* Transpose output matrices */
86  LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
87  LAPACKE_zge_trans( LAPACK_COL_MAJOR, ldt, MIN(m,n), t_t, ldt_t, t,
88  ldt );
89  /* Release memory and exit */
90  LAPACKE_free( t_t );
91 exit_level_1:
92  LAPACKE_free( a_t );
93 exit_level_0:
94  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
95  LAPACKE_xerbla( "LAPACKE_zgeqrt_work", info );
96  }
97  } else {
98  info = -1;
99  LAPACKE_xerbla( "LAPACKE_zgeqrt_work", info );
100  }
101  return info;
102 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
#define MIN(x, y)
Definition: lapacke_utils.h:50
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_zgeqrt(lapack_int *m, lapack_int *n, lapack_int *nb, lapack_complex_double *a, lapack_int *lda, lapack_complex_double *t, lapack_int *ldt, lapack_complex_double *work, lapack_int *info)
#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
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
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