LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
 All Classes Files Functions Variables Typedefs Macros
lapacke_dlarfb_work.c File Reference
#include "lapacke_utils.h"
Include dependency graph for lapacke_dlarfb_work.c:

Go to the source code of this file.

Functions/Subroutines

lapack_int LAPACKE_dlarfb_work (int matrix_order, char side, char trans, char direct, char storev, lapack_int m, lapack_int n, lapack_int k, const double *v, lapack_int ldv, const double *t, lapack_int ldt, double *c, lapack_int ldc, double *work, lapack_int ldwork)

Function/Subroutine Documentation

lapack_int LAPACKE_dlarfb_work ( int  matrix_order,
char  side,
char  trans,
char  direct,
char  storev,
lapack_int  m,
lapack_int  n,
lapack_int  k,
const double *  v,
lapack_int  ldv,
const double *  t,
lapack_int  ldt,
double *  c,
lapack_int  ldc,
double *  work,
lapack_int  ldwork 
)

Definition at line 36 of file lapacke_dlarfb_work.c.

{
lapack_int info = 0;
lapack_int nrows_v, ncols_v;
lapack_int ldc_t, ldt_t, ldv_t;
double *v_t = NULL, *t_t = NULL, *c_t = NULL;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dlarfb( &side, &trans, &direct, &storev, &m, &n, &k, v, &ldv, t,
&ldt, c, &ldc, work, &ldwork );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
nrows_v = ( LAPACKE_lsame( storev, 'c' ) &&
LAPACKE_lsame( side, 'l' ) ) ? m :
( ( LAPACKE_lsame( storev, 'c' ) &&
LAPACKE_lsame( side, 'r' ) ) ? n :
( LAPACKE_lsame( storev, 'r' ) ? k : 1) );
ncols_v = LAPACKE_lsame( storev, 'c' ) ? k :
( ( LAPACKE_lsame( storev, 'r' ) &&
LAPACKE_lsame( side, 'l' ) ) ? m :
( ( LAPACKE_lsame( storev, 'r' ) &&
LAPACKE_lsame( side, 'r' ) ) ? n : 1) );
ldc_t = MAX(1,m);
ldt_t = MAX(1,k);
ldv_t = MAX(1,nrows_v);
/* Check leading dimension(s) */
if( ldc < n ) {
info = -14;
LAPACKE_xerbla( "LAPACKE_dlarfb_work", info );
return info;
}
if( ldt < k ) {
info = -12;
LAPACKE_xerbla( "LAPACKE_dlarfb_work", info );
return info;
}
if( ldv < ncols_v ) {
info = -10;
LAPACKE_xerbla( "LAPACKE_dlarfb_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
v_t = (double*)
LAPACKE_malloc( sizeof(double) * ldv_t * MAX(1,ncols_v) );
if( v_t == NULL ) {
goto exit_level_0;
}
t_t = (double*)LAPACKE_malloc( sizeof(double) * ldt_t * MAX(1,k) );
if( t_t == NULL ) {
goto exit_level_1;
}
c_t = (double*)LAPACKE_malloc( sizeof(double) * ldc_t * MAX(1,n) );
if( c_t == NULL ) {
goto exit_level_2;
}
/* Transpose input matrices */
if( LAPACKE_lsame( storev, 'c' ) && LAPACKE_lsame( direct, 'f' ) ) {
LAPACKE_dtr_trans( matrix_order, 'l', 'u', k, v, ldv, v_t, ldv_t );
LAPACKE_dge_trans( matrix_order, nrows_v-k, ncols_v, &v[k*ldv], ldv,
&v_t[k], ldv_t );
} else if( LAPACKE_lsame( storev, 'c' ) &&
LAPACKE_lsame( direct, 'b' ) ) {
if( k > nrows_v ) {
LAPACKE_xerbla( "LAPACKE_dlarfb_work", -8 );
return -8;
}
LAPACKE_dtr_trans( matrix_order, 'u', 'u', k, &v[(nrows_v-k)*ldv],
ldv, &v_t[nrows_v-k], ldv_t );
LAPACKE_dge_trans( matrix_order, nrows_v-k, ncols_v, v, ldv, v_t,
ldv_t );
} else if( LAPACKE_lsame( storev, 'r' ) &&
LAPACKE_lsame( direct, 'f' ) ) {
LAPACKE_dtr_trans( matrix_order, 'u', 'u', k, v, ldv, v_t, ldv_t );
LAPACKE_dge_trans( matrix_order, nrows_v, ncols_v-k, &v[k], ldv,
&v_t[k*ldv_t], ldv_t );
} else if( LAPACKE_lsame( storev, 'r' ) &&
LAPACKE_lsame( direct, 'f' ) ) {
if( k > ncols_v ) {
LAPACKE_xerbla( "LAPACKE_dlarfb_work", -8 );
return -8;
}
LAPACKE_dtr_trans( matrix_order, 'l', 'u', k, &v[ncols_v-k], ldv,
&v_t[(ncols_v-k)*ldv_t], ldv_t );
LAPACKE_dge_trans( matrix_order, nrows_v, ncols_v-k, v, ldv, v_t,
ldv_t );
}
LAPACKE_dge_trans( matrix_order, k, k, t, ldt, t_t, ldt_t );
LAPACKE_dge_trans( matrix_order, m, n, c, ldc, c_t, ldc_t );
/* Call LAPACK function and adjust info */
LAPACK_dlarfb( &side, &trans, &direct, &storev, &m, &n, &k, v_t, &ldv_t,
t_t, &ldt_t, c_t, &ldc_t, work, &ldwork );
info = 0; /* LAPACK call is ok! */
/* Transpose output matrices */
LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, c_t, ldc_t, c, ldc );
/* Release memory and exit */
LAPACKE_free( c_t );
exit_level_2:
LAPACKE_free( t_t );
exit_level_1:
LAPACKE_free( v_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dlarfb_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dlarfb_work", info );
}
return info;
}

Here is the call graph for this function:

Here is the caller graph for this function: