LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zlarft_work()

lapack_int LAPACKE_zlarft_work ( int  matrix_layout,
char  direct,
char  storev,
lapack_int  n,
lapack_int  k,
const lapack_complex_double v,
lapack_int  ldv,
const lapack_complex_double tau,
lapack_complex_double t,
lapack_int  ldt 
)

Definition at line 36 of file lapacke_zlarft_work.c.

41 {
42  lapack_int info = 0;
43  lapack_int nrows_v, ncols_v;
44  lapack_int ldt_t, ldv_t;
45  lapack_complex_double *v_t = NULL, *t_t = NULL;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_zlarft( &direct, &storev, &n, &k, v, &ldv, tau, t, &ldt );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  nrows_v = LAPACKE_lsame( storev, 'c' ) ? n :
54  ( LAPACKE_lsame( storev, 'r' ) ? k : 1);
55  ncols_v = LAPACKE_lsame( storev, 'c' ) ? k :
56  ( LAPACKE_lsame( storev, 'r' ) ? n : 1);
57  ldt_t = MAX(1,k);
58  ldv_t = MAX(1,nrows_v);
59  /* Check leading dimension(s) */
60  if( ldt < k ) {
61  info = -10;
62  LAPACKE_xerbla( "LAPACKE_zlarft_work", info );
63  return info;
64  }
65  if( ldv < ncols_v ) {
66  info = -7;
67  LAPACKE_xerbla( "LAPACKE_zlarft_work", info );
68  return info;
69  }
70  /* Allocate memory for temporary array(s) */
71  v_t = (lapack_complex_double*)
73  ldv_t * MAX(1,ncols_v) );
74  if( v_t == NULL ) {
76  goto exit_level_0;
77  }
78  t_t = (lapack_complex_double*)
79  LAPACKE_malloc( sizeof(lapack_complex_double) * ldt_t * MAX(1,k) );
80  if( t_t == NULL ) {
82  goto exit_level_1;
83  }
84  /* Transpose input matrices */
85  LAPACKE_zge_trans( matrix_layout, nrows_v, ncols_v, v, ldv, v_t, ldv_t );
86  /* Call LAPACK function and adjust info */
87  LAPACK_zlarft( &direct, &storev, &n, &k, v_t, &ldv_t, tau, t_t,
88  &ldt_t );
89  info = 0; /* LAPACK call is ok! */
90  /* Transpose output matrices */
91  LAPACKE_zge_trans( LAPACK_COL_MAJOR, k, k, t_t, ldt_t, t, ldt );
92  /* Release memory and exit */
93  LAPACKE_free( t_t );
94 exit_level_1:
95  LAPACKE_free( v_t );
96 exit_level_0:
97  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
98  LAPACKE_xerbla( "LAPACKE_zlarft_work", info );
99  }
100  } else {
101  info = -1;
102  LAPACKE_xerbla( "LAPACKE_zlarft_work", info );
103  }
104  return info;
105 }
#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 MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_zlarft(char *direct, char *storev, lapack_int *n, lapack_int *k, const lapack_complex_double *v, lapack_int *ldv, const lapack_complex_double *tau, lapack_complex_double *t, lapack_int *ldt)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#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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