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

lapack_int LAPACKE_dtrsen (int matrix_order, char job, char compq, const lapack_logical *select, lapack_int n, double *t, lapack_int ldt, double *q, lapack_int ldq, double *wr, double *wi, lapack_int *m, double *s, double *sep)

Function/Subroutine Documentation

lapack_int LAPACKE_dtrsen ( int  matrix_order,
char  job,
char  compq,
const lapack_logical select,
lapack_int  n,
double *  t,
lapack_int  ldt,
double *  q,
lapack_int  ldq,
double *  wr,
double *  wi,
lapack_int m,
double *  s,
double *  sep 
)

Definition at line 36 of file lapacke_dtrsen.c.

{
lapack_int info = 0;
lapack_int liwork = -1;
lapack_int lwork = -1;
lapack_int* iwork = NULL;
double* work = NULL;
lapack_int iwork_query;
double work_query;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_dtrsen", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_lsame( compq, 'v' ) ) {
if( LAPACKE_dge_nancheck( matrix_order, n, n, q, ldq ) ) {
return -8;
}
}
if( LAPACKE_dge_nancheck( matrix_order, n, n, t, ldt ) ) {
return -6;
}
#endif
/* Query optimal working array(s) size */
info = LAPACKE_dtrsen_work( matrix_order, job, compq, select, n, t, ldt, q,
ldq, wr, wi, m, s, sep, &work_query, lwork,
&iwork_query, liwork );
if( info != 0 ) {
goto exit_level_0;
}
liwork = (lapack_int)iwork_query;
lwork = (lapack_int)work_query;
/* Allocate memory for work arrays */
if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
if( iwork == NULL ) {
goto exit_level_0;
}
}
work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
if( work == NULL ) {
goto exit_level_1;
}
/* Call middle-level interface */
info = LAPACKE_dtrsen_work( matrix_order, job, compq, select, n, t, ldt, q,
ldq, wr, wi, m, s, sep, work, lwork, iwork,
liwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_1:
if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
LAPACKE_free( iwork );
}
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_dtrsen", info );
}
return info;
}

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