LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_slarfb()

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

Definition at line 35 of file lapacke_slarfb.c.

40{
41 lapack_int info = 0;
42 lapack_int ldwork;
43 float* work = NULL;
44 lapack_int nrows_v, ncols_v;
45 lapack_logical left, col, forward;
46 char uplo;
47 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48 LAPACKE_xerbla( "LAPACKE_slarfb", -1 );
49 return -1;
50 }
51#ifndef LAPACK_DISABLE_NAN_CHECK
52 if( LAPACKE_get_nancheck() ) {
53 /* Optionally check input matrices for NaNs */
54 left = LAPACKE_lsame( side, 'l' );
55 col = LAPACKE_lsame( storev, 'c' );
56 forward = LAPACKE_lsame( direct, 'f' );
57
58 nrows_v = ( col && left ) ? m : ( ( col && !left ) ? n : ( !col ? k : 1) );
59 ncols_v = ( !col && left ) ? m : ( ( !col && !left ) ? n : ( col ? k : 1 ) );
60 uplo = ( ( left && col ) || !( left || col ) ) ? 'l' : 'u';
61
62 if( !forward && ( col && k > nrows_v ) || ( !col && k > ncols_v )) {
63 LAPACKE_xerbla( "LAPACKE_slarfb", -8 );
64 return -8;
65 }
66 if( LAPACKE_stz_nancheck( matrix_layout, direct, uplo, 'u',
67 nrows_v, ncols_v, v, ldv ) ) {
68 return -9;
69 }
70 if( LAPACKE_sge_nancheck( matrix_layout, k, k, t, ldt ) ) {
71 return -11;
72 }
73 if( LAPACKE_sge_nancheck( matrix_layout, m, n, c, ldc ) ) {
74 return -13;
75 }
76 }
77#endif
78 if( LAPACKE_lsame( side, 'l' ) ) {
79 ldwork = n;
80 } else if( LAPACKE_lsame( side, 'r' ) ) {
81 ldwork = m;
82 } else {
83 ldwork = 1;
84 }
85 /* Allocate memory for working array(s) */
86 work = (float*)LAPACKE_malloc( sizeof(float) * ldwork * MAX(1,k) );
87 if( work == NULL ) {
88 info = LAPACK_WORK_MEMORY_ERROR;
89 goto exit_level_0;
90 }
91 /* Call middle-level interface */
92 info = LAPACKE_slarfb_work( matrix_layout, side, trans, direct, storev, m, n,
93 k, v, ldv, t, ldt, c, ldc, work, ldwork );
94 /* Release memory and exit */
95 LAPACKE_free( work );
96exit_level_0:
97 if( info == LAPACK_WORK_MEMORY_ERROR ) {
98 LAPACKE_xerbla( "LAPACKE_slarfb", info );
99 }
100 return info;
101}
lapack_int
#define lapack_int
Definition: lapack.h:87
lapack_logical
#define lapack_logical
Definition: lapack.h:103
LAPACK_WORK_MEMORY_ERROR
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:46
LAPACKE_slarfb_work
lapack_int LAPACKE_slarfb_work(int matrix_layout, char side, char trans, char direct, char storev, lapack_int m, lapack_int n, lapack_int k, const float *v, lapack_int ldv, const float *t, lapack_int ldt, float *c, lapack_int ldc, float *work, lapack_int ldwork)
Definition: lapacke_slarfb_work.c:35
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
LAPACKE_get_nancheck
int LAPACKE_get_nancheck(void)
Definition: lapacke_nancheck.c:42
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
LAPACKE_stz_nancheck
lapack_logical LAPACKE_stz_nancheck(int matrix_layout, char direct, char uplo, char diag, lapack_int m, lapack_int n, const float *a, lapack_int lda)
Definition: lapacke_stz_nancheck.c:83
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:36
LAPACKE_sge_nancheck
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
Definition: lapacke_sge_nancheck.c:36
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:46
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