LAPACK  3.10.1
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 35 of file lapacke_clarfb.c.

41 {
42  lapack_int info = 0;
43  lapack_int ldwork;
44  lapack_complex_float* work = NULL;
45  lapack_int ncols_v, nrows_v;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_clarfb", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  lapack_int lrv, lcv; /* row, column stride */
54  if( matrix_layout == LAPACK_COL_MAJOR ) {
55  lrv = 1;
56  lcv = ldv;
57  } else {
58  lrv = ldv;
59  lcv = 1;
60  }
61  ncols_v = LAPACKE_lsame( storev, 'c' ) ? k :
62  ( ( LAPACKE_lsame( storev, 'r' ) && LAPACKE_lsame( side, 'l' ) ) ? m :
63  ( ( LAPACKE_lsame( storev, 'r' ) && LAPACKE_lsame( side, 'r' ) ) ? n : 1) );
64 
65  nrows_v = ( LAPACKE_lsame( storev, 'c' ) && LAPACKE_lsame( side, 'l' ) ) ? m :
66  ( ( LAPACKE_lsame( storev, 'c' ) && LAPACKE_lsame( side, 'r' ) ) ? n :
67  ( LAPACKE_lsame( storev, 'r' ) ? k : 1) );
68  if( LAPACKE_cge_nancheck( matrix_layout, m, n, c, ldc ) ) {
69  return -13;
70  }
71  if( LAPACKE_cge_nancheck( matrix_layout, k, k, t, ldt ) ) {
72  return -11;
73  }
74  if( LAPACKE_lsame( storev, 'c' ) && LAPACKE_lsame( direct, 'f' ) ) {
75  if( LAPACKE_ctr_nancheck( matrix_layout, 'l', 'u', k, v, ldv ) )
76  return -9;
77  if( LAPACKE_cge_nancheck( matrix_layout, nrows_v-k, ncols_v,
78  &v[k*lrv], ldv ) )
79  return -9;
80  } else if( LAPACKE_lsame( storev, 'c' ) && LAPACKE_lsame( direct, 'b' ) ) {
81  if( k > nrows_v ) {
82  LAPACKE_xerbla( "LAPACKE_clarfb", -8 );
83  return -8;
84  }
85  if( LAPACKE_ctr_nancheck( matrix_layout, 'u', 'u', k,
86  &v[(nrows_v-k)*lrv], ldv ) )
87  return -9;
88  if( LAPACKE_cge_nancheck( matrix_layout, nrows_v-k, ncols_v, v, ldv ) )
89  return -9;
90  } else if( LAPACKE_lsame( storev, 'r' ) && LAPACKE_lsame( direct, 'f' ) ) {
91  if( LAPACKE_ctr_nancheck( matrix_layout, 'u', 'u', k, v, ldv ) )
92  return -9;
93  if( LAPACKE_cge_nancheck( matrix_layout, nrows_v, ncols_v-k,
94  &v[k*lrv], ldv ) )
95  return -9;
96  } else if( LAPACKE_lsame( storev, 'r' ) && LAPACKE_lsame( direct, 'b' ) ) {
97  if( k > ncols_v ) {
98  LAPACKE_xerbla( "LAPACKE_clarfb", -8 );
99  return -8;
100  }
101  if( LAPACKE_ctr_nancheck( matrix_layout, 'l', 'u', k,
102  &v[(ncols_v-k)*lcv], ldv ) )
103  return -9;
104  if( LAPACKE_cge_nancheck( matrix_layout, nrows_v, ncols_v-k, v, ldv ) )
105  return -9;
106  }
107  }
108 #endif
109  if( LAPACKE_lsame( side, 'l' ) ) {
110  ldwork = n;
111  } else if( LAPACKE_lsame( side, 'r' ) ) {
112  ldwork = m;
113  } else {
114  ldwork = 1;
115  }
116  /* Allocate memory for working array(s) */
117  work = (lapack_complex_float*)
118  LAPACKE_malloc( sizeof(lapack_complex_float) * ldwork * MAX(1,k) );
119  if( work == NULL ) {
121  goto exit_level_0;
122  }
123  /* Call middle-level interface */
124  info = LAPACKE_clarfb_work( matrix_layout, side, trans, direct, storev, m, n,
125  k, v, ldv, t, ldt, c, ldc, work, ldwork );
126  /* Release memory and exit */
127  LAPACKE_free( work );
128 exit_level_0:
129  if( info == LAPACK_WORK_MEMORY_ERROR ) {
130  LAPACKE_xerbla( "LAPACKE_clarfb", info );
131  }
132  return info;
133 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_float
Definition: lapack.h:45
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
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)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
lapack_logical LAPACKE_ctr_nancheck(int matrix_layout, char uplo, char diag, lapack_int n, const lapack_complex_float *a, lapack_int lda)
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