LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_clarfb()

lapack_int LAPACKE_clarfb ( int  matrix_layout,
char  side,
char  trans,
char  direct,
char  storev,
lapack_int  m,
lapack_int  n,
lapack_int  k,
const lapack_complex_float v,
lapack_int  ldv,
const lapack_complex_float t,
lapack_int  ldt,
lapack_complex_float c,
lapack_int  ldc 
)

Definition at line 36 of file lapacke_clarfb.c.

42 {
43  lapack_int info = 0;
44  lapack_int ldwork;
45  lapack_complex_float* work = NULL;
46  lapack_int ncols_v, nrows_v;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_clarfb", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  ncols_v = LAPACKE_lsame( storev, 'c' ) ? k :
55  ( ( LAPACKE_lsame( storev, 'r' ) &&
56  LAPACKE_lsame( side, 'l' ) ) ? m :
57  ( ( LAPACKE_lsame( storev, 'r' ) &&
58  LAPACKE_lsame( side, 'r' ) ) ? n : 1) );
59  nrows_v = ( LAPACKE_lsame( storev, 'c' ) &&
60  LAPACKE_lsame( side, 'l' ) ) ? m :
61  ( ( LAPACKE_lsame( storev, 'c' ) &&
62  LAPACKE_lsame( side, 'r' ) ) ? n :
63  ( LAPACKE_lsame( storev, 'r' ) ? k : 1) );
64  if( LAPACKE_cge_nancheck( matrix_layout, m, n, c, ldc ) ) {
65  return -13;
66  }
67  if( LAPACKE_cge_nancheck( matrix_layout, k, k, t, ldt ) ) {
68  return -11;
69  }
70  if( LAPACKE_lsame( storev, 'c' ) && LAPACKE_lsame( direct, 'f' ) ) {
71  if( LAPACKE_ctr_nancheck( matrix_layout, 'l', 'u', k, v, ldv ) )
72  return -9;
73  if( LAPACKE_cge_nancheck( matrix_layout, nrows_v-k, ncols_v, &v[k*ldv],
74  ldv ) )
75  return -9;
76  } else if( LAPACKE_lsame( storev, 'c' ) && LAPACKE_lsame( direct, 'b' ) ) {
77  if( k > nrows_v ) {
78  LAPACKE_xerbla( "LAPACKE_clarfb", -8 );
79  return -8;
80  }
81  if( LAPACKE_ctr_nancheck( matrix_layout, 'u', 'u', k,
82  &v[(nrows_v-k)*ldv], ldv ) )
83  return -9;
84  if( LAPACKE_cge_nancheck( matrix_layout, nrows_v-k, ncols_v, v, ldv ) )
85  return -9;
86  } else if( LAPACKE_lsame( storev, 'r' ) && LAPACKE_lsame( direct, 'f' ) ) {
87  if( LAPACKE_ctr_nancheck( matrix_layout, 'u', 'u', k, v, ldv ) )
88  return -9;
89  if( LAPACKE_cge_nancheck( matrix_layout, nrows_v, ncols_v-k, &v[k],
90  ldv ) )
91  return -9;
92  } else if( LAPACKE_lsame( storev, 'r' ) && LAPACKE_lsame( direct, 'f' ) ) {
93  if( k > ncols_v ) {
94  LAPACKE_xerbla( "LAPACKE_clarfb", -8 );
95  return -8;
96  }
97  if( LAPACKE_ctr_nancheck( matrix_layout, 'l', 'u', k, &v[ncols_v-k],
98  ldv ) )
99  return -9;
100  if( LAPACKE_cge_nancheck( matrix_layout, nrows_v, ncols_v-k, v, ldv ) )
101  return -9;
102  }
103  }
104 #endif
105  if( LAPACKE_lsame( side, 'l' ) ) {
106  ldwork = n;
107  } else if( LAPACKE_lsame( side, 'r' ) ) {
108  ldwork = m;
109  } else {
110  ldwork = 1;
111  }
112  /* Allocate memory for working array(s) */
113  work = (lapack_complex_float*)
114  LAPACKE_malloc( sizeof(lapack_complex_float) * ldwork * MAX(1,k) );
115  if( work == NULL ) {
117  goto exit_level_0;
118  }
119  /* Call middle-level interface */
120  info = LAPACKE_clarfb_work( matrix_layout, side, trans, direct, storev, m, n,
121  k, v, ldv, t, ldt, c, ldc, work, ldwork );
122  /* Release memory and exit */
123  LAPACKE_free( work );
124 exit_level_0:
125  if( info == LAPACK_WORK_MEMORY_ERROR ) {
126  LAPACKE_xerbla( "LAPACKE_clarfb", info );
127  }
128  return info;
129 }
lapack_logical LAPACKE_ctr_nancheck(int matrix_layout, char uplo, char diag, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
lapack_int LAPACKE_clarfb_work(int matrix_layout, char side, char trans, char direct, char storev, lapack_int m, lapack_int n, lapack_int k, const lapack_complex_float *v, lapack_int ldv, const lapack_complex_float *t, lapack_int ldt, lapack_complex_float *c, lapack_int ldc, lapack_complex_float *work, lapack_int ldwork)
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
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
int LAPACKE_get_nancheck()
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