LAPACK  3.5.0
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lapacke_dtgsna_work.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_dtgsna_work (int matrix_order, char job, char howmny, const lapack_logical *select, lapack_int n, const double *a, lapack_int lda, const double *b, lapack_int ldb, const double *vl, lapack_int ldvl, const double *vr, lapack_int ldvr, double *s, double *dif, lapack_int mm, lapack_int *m, double *work, lapack_int lwork, lapack_int *iwork)

Function/Subroutine Documentation

lapack_int LAPACKE_dtgsna_work ( int  matrix_order,
char  job,
char  howmny,
const lapack_logical select,
lapack_int  n,
const double *  a,
lapack_int  lda,
const double *  b,
lapack_int  ldb,
const double *  vl,
lapack_int  ldvl,
const double *  vr,
lapack_int  ldvr,
double *  s,
double *  dif,
lapack_int  mm,
lapack_int m,
double *  work,
lapack_int  lwork,
lapack_int iwork 
)

Definition at line 36 of file lapacke_dtgsna_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dtgsna( &job, &howmny, select, &n, a, &lda, b, &ldb, vl, &ldvl,
vr, &ldvr, s, dif, &mm, m, work, &lwork, iwork, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int lda_t = MAX(1,n);
lapack_int ldb_t = MAX(1,n);
lapack_int ldvl_t = MAX(1,n);
lapack_int ldvr_t = MAX(1,n);
double* a_t = NULL;
double* b_t = NULL;
double* vl_t = NULL;
double* vr_t = NULL;
/* Check leading dimension(s) */
if( lda < n ) {
info = -7;
LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
return info;
}
if( ldb < n ) {
info = -9;
LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
return info;
}
if( ldvl < mm ) {
info = -11;
LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
return info;
}
if( ldvr < mm ) {
info = -13;
LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
return info;
}
/* Query optimal working array(s) size if requested */
if( lwork == -1 ) {
LAPACK_dtgsna( &job, &howmny, select, &n, a, &lda_t, b, &ldb_t, vl,
&ldvl_t, vr, &ldvr_t, s, dif, &mm, m, work, &lwork,
iwork, &info );
return (info < 0) ? (info - 1) : info;
}
/* Allocate memory for temporary array(s) */
a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
if( a_t == NULL ) {
goto exit_level_0;
}
b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
if( b_t == NULL ) {
goto exit_level_1;
}
if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
vl_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,mm) );
if( vl_t == NULL ) {
goto exit_level_2;
}
}
if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
vr_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,mm) );
if( vr_t == NULL ) {
goto exit_level_3;
}
}
/* Transpose input matrices */
LAPACKE_dge_trans( matrix_order, n, n, a, lda, a_t, lda_t );
LAPACKE_dge_trans( matrix_order, n, n, b, ldb, b_t, ldb_t );
if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
LAPACKE_dge_trans( matrix_order, n, mm, vl, ldvl, vl_t, ldvl_t );
}
if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
LAPACKE_dge_trans( matrix_order, n, mm, vr, ldvr, vr_t, ldvr_t );
}
/* Call LAPACK function and adjust info */
LAPACK_dtgsna( &job, &howmny, select, &n, a_t, &lda_t, b_t, &ldb_t,
vl_t, &ldvl_t, vr_t, &ldvr_t, s, dif, &mm, m, work,
&lwork, iwork, &info );
if( info < 0 ) {
info = info - 1;
}
/* Release memory and exit */
if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
LAPACKE_free( vr_t );
}
exit_level_3:
if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
LAPACKE_free( vl_t );
}
exit_level_2:
LAPACKE_free( b_t );
exit_level_1:
LAPACKE_free( a_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
}
return info;
}

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