LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_zlarfb()

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

Definition at line 35 of file lapacke_zlarfb.c.

41{
42 lapack_int info = 0;
43 lapack_int ldwork;
44 lapack_complex_double* work = NULL;
45 lapack_int nrows_v, ncols_v;
46 lapack_logical left, col, forward;
47 char uplo;
48 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49 LAPACKE_xerbla( "LAPACKE_zlarfb", -1 );
50 return -1;
51 }
52#ifndef LAPACK_DISABLE_NAN_CHECK
53 if( LAPACKE_get_nancheck() ) {
54 /* Optionally check input matrices for NaNs */
55 left = LAPACKE_lsame( side, 'l' );
56 col = LAPACKE_lsame( storev, 'c' );
57 forward = LAPACKE_lsame( direct, 'f' );
58
59 nrows_v = ( col && left ) ? m : ( ( col && !left ) ? n : ( !col ? k : 1) );
60 ncols_v = ( !col && left ) ? m : ( ( !col && !left ) ? n : ( col ? k : 1 ) );
61 uplo = ( ( left && col ) || !( left || col ) ) ? 'l' : 'u';
62
63 if( !forward && ( col && k > nrows_v ) || ( !col && k > ncols_v )) {
64 LAPACKE_xerbla( "LAPACKE_zlarfb", -8 );
65 return -8;
66 }
67 if( LAPACKE_ztz_nancheck( matrix_layout, direct, uplo, 'u',
68 nrows_v, ncols_v, v, ldv ) ) {
69 return -9;
70 }
71 if( LAPACKE_zge_nancheck( matrix_layout, k, k, t, ldt ) ) {
72 return -11;
73 }
74 if( LAPACKE_zge_nancheck( matrix_layout, m, n, c, ldc ) ) {
75 return -13;
76 }
77 }
78#endif
79 if( LAPACKE_lsame( side, 'l' ) ) {
80 ldwork = n;
81 } else if( LAPACKE_lsame( side, 'r' ) ) {
82 ldwork = m;
83 } else {
84 ldwork = 1;
85 }
86 /* Allocate memory for working array(s) */
87 work = (lapack_complex_double*)
88 LAPACKE_malloc( sizeof(lapack_complex_double) * ldwork * MAX(1,k) );
89 if( work == NULL ) {
91 goto exit_level_0;
92 }
93 /* Call middle-level interface */
94 info = LAPACKE_zlarfb_work( matrix_layout, side, trans, direct, storev, m, n,
95 k, v, ldv, t, ldt, c, ldc, work, ldwork );
96 /* Release memory and exit */
97 LAPACKE_free( work );
98exit_level_0:
99 if( info == LAPACK_WORK_MEMORY_ERROR ) {
100 LAPACKE_xerbla( "LAPACKE_zlarfb", info );
101 }
102 return info;
103}
#define lapack_int
Definition: lapack.h:87
#define lapack_complex_double
Definition: lapack.h:64
#define lapack_logical
Definition: lapack.h:103
lapack_int LAPACKE_zlarfb_work(int matrix_layout, char side, char trans, char direct, char storev, lapack_int m, lapack_int n, lapack_int k, const lapack_complex_double *v, lapack_int ldv, const lapack_complex_double *t, lapack_int ldt, lapack_complex_double *c, lapack_int ldc, lapack_complex_double *work, lapack_int ldwork)
#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)
#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)
lapack_logical LAPACKE_zge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:46
lapack_logical LAPACKE_ztz_nancheck(int matrix_layout, char direct, char uplo, char diag, lapack_int m, lapack_int n, const lapack_complex_double *a, lapack_int lda)
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