LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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lapacke_dorbdb.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_dorbdb (int matrix_order, char trans, char signs, lapack_int m, lapack_int p, lapack_int q, double *x11, lapack_int ldx11, double *x12, lapack_int ldx12, double *x21, lapack_int ldx21, double *x22, lapack_int ldx22, double *theta, double *phi, double *taup1, double *taup2, double *tauq1, double *tauq2)

Function/Subroutine Documentation

lapack_int LAPACKE_dorbdb ( int  matrix_order,
char  trans,
char  signs,
lapack_int  m,
lapack_int  p,
lapack_int  q,
double *  x11,
lapack_int  ldx11,
double *  x12,
lapack_int  ldx12,
double *  x21,
lapack_int  ldx21,
double *  x22,
lapack_int  ldx22,
double *  theta,
double *  phi,
double *  taup1,
double *  taup2,
double *  tauq1,
double *  tauq2 
)

Definition at line 36 of file lapacke_dorbdb.c.

{
lapack_int info = 0;
lapack_int lwork = -1;
double* work = NULL;
double work_query;
lapack_int nrows_x11, nrows_x12, nrows_x21, nrows_x22;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_dorbdb", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
nrows_x11 = ( LAPACKE_lsame( trans, 'n' ) ? p : q);
nrows_x12 = ( LAPACKE_lsame( trans, 'n' ) ? p : m-q);
nrows_x21 = ( LAPACKE_lsame( trans, 'n' ) ? m-p : q);
nrows_x22 = ( LAPACKE_lsame( trans, 'n' ) ? m-p : m-q);
if( LAPACKE_dge_nancheck( matrix_order, nrows_x11, q, x11, ldx11 ) ) {
return -7;
}
if( LAPACKE_dge_nancheck( matrix_order, nrows_x12, m-q, x12, ldx12 ) ) {
return -9;
}
if( LAPACKE_dge_nancheck( matrix_order, nrows_x21, q, x21, ldx21 ) ) {
return -11;
}
if( LAPACKE_dge_nancheck( matrix_order, nrows_x22, m-q, x22, ldx22 ) ) {
return -13;
}
#endif
/* Query optimal working array(s) size */
info = LAPACKE_dorbdb_work( matrix_order, trans, signs, m, p, q, x11, ldx11,
x12, ldx12, x21, ldx21, x22, ldx22, theta, phi,
taup1, taup2, tauq1, tauq2, &work_query,
lwork );
if( info != 0 ) {
goto exit_level_0;
}
lwork = (lapack_int)work_query;
/* Allocate memory for work arrays */
work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
if( work == NULL ) {
goto exit_level_0;
}
/* Call middle-level interface */
info = LAPACKE_dorbdb_work( matrix_order, trans, signs, m, p, q, x11, ldx11,
x12, ldx12, x21, ldx21, x22, ldx22, theta, phi,
taup1, taup2, tauq1, tauq2, work, lwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_dorbdb", info );
}
return info;
}

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