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

lapack_int LAPACKE_dtgsen (int matrix_order, lapack_int ijob, lapack_logical wantq, lapack_logical wantz, const lapack_logical *select, lapack_int n, double *a, lapack_int lda, double *b, lapack_int ldb, double *alphar, double *alphai, double *beta, double *q, lapack_int ldq, double *z, lapack_int ldz, lapack_int *m, double *pl, double *pr, double *dif)

Function/Subroutine Documentation

lapack_int LAPACKE_dtgsen ( int  matrix_order,
lapack_int  ijob,
lapack_logical  wantq,
lapack_logical  wantz,
const lapack_logical select,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  alphar,
double *  alphai,
double *  beta,
double *  q,
lapack_int  ldq,
double *  z,
lapack_int  ldz,
lapack_int m,
double *  pl,
double *  pr,
double *  dif 
)

Definition at line 36 of file lapacke_dtgsen.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_dtgsen", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_dge_nancheck( matrix_order, n, n, a, lda ) ) {
return -7;
}
if( LAPACKE_dge_nancheck( matrix_order, n, n, b, ldb ) ) {
return -9;
}
if( wantq ) {
if( LAPACKE_dge_nancheck( matrix_order, n, n, q, ldq ) ) {
return -14;
}
}
if( wantz ) {
if( LAPACKE_dge_nancheck( matrix_order, n, n, z, ldz ) ) {
return -16;
}
}
#endif
/* Query optimal working array(s) size */
info = LAPACKE_dtgsen_work( matrix_order, ijob, wantq, wantz, select, n, a,
lda, b, ldb, alphar, alphai, beta, q, ldq, z,
ldz, m, pl, pr, dif, &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( ijob != 0 ) {
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_dtgsen_work( matrix_order, ijob, wantq, wantz, select, n, a,
lda, b, ldb, alphar, alphai, beta, q, ldq, z,
ldz, m, pl, pr, dif, work, lwork, iwork,
liwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_1:
if( ijob != 0 ) {
LAPACKE_free( iwork );
}
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_dtgsen", info );
}
return info;
}

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