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

lapack_int LAPACKE_dtrevc_work (int matrix_order, char side, char howmny, lapack_logical *select, lapack_int n, const double *t, lapack_int ldt, double *vl, lapack_int ldvl, double *vr, lapack_int ldvr, lapack_int mm, lapack_int *m, double *work)

Function/Subroutine Documentation

lapack_int LAPACKE_dtrevc_work ( int  matrix_order,
char  side,
char  howmny,
lapack_logical select,
lapack_int  n,
const double *  t,
lapack_int  ldt,
double *  vl,
lapack_int  ldvl,
double *  vr,
lapack_int  ldvr,
lapack_int  mm,
lapack_int m,
double *  work 
)

Definition at line 36 of file lapacke_dtrevc_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dtrevc( &side, &howmny, select, &n, t, &ldt, vl, &ldvl, vr,
&ldvr, &mm, m, work, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldt_t = MAX(1,n);
lapack_int ldvl_t = MAX(1,n);
lapack_int ldvr_t = MAX(1,n);
double* t_t = NULL;
double* vl_t = NULL;
double* vr_t = NULL;
/* Check leading dimension(s) */
if( ldt < n ) {
info = -7;
LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
return info;
}
if( ldvl < mm ) {
info = -9;
LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
return info;
}
if( ldvr < mm ) {
info = -11;
LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
t_t = (double*)LAPACKE_malloc( sizeof(double) * ldt_t * MAX(1,n) );
if( t_t == NULL ) {
goto exit_level_0;
}
if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
vl_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,mm) );
if( vl_t == NULL ) {
goto exit_level_1;
}
}
if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
vr_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,mm) );
if( vr_t == NULL ) {
goto exit_level_2;
}
}
/* Transpose input matrices */
LAPACKE_dge_trans( matrix_order, n, n, t, ldt, t_t, ldt_t );
if( ( LAPACKE_lsame( side, 'l' ) || LAPACKE_lsame( side, 'b' ) ) &&
LAPACKE_lsame( howmny, 'b' ) ) {
LAPACKE_dge_trans( matrix_order, n, mm, vl, ldvl, vl_t, ldvl_t );
}
if( ( LAPACKE_lsame( side, 'r' ) || LAPACKE_lsame( side, 'b' ) ) &&
LAPACKE_lsame( howmny, 'b' ) ) {
LAPACKE_dge_trans( matrix_order, n, mm, vr, ldvr, vr_t, ldvr_t );
}
/* Call LAPACK function and adjust info */
LAPACK_dtrevc( &side, &howmny, select, &n, t_t, &ldt_t, vl_t, &ldvl_t,
vr_t, &ldvr_t, &mm, m, work, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, mm, vl_t, ldvl_t, vl,
ldvl );
}
if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, mm, vr_t, ldvr_t, vr,
ldvr );
}
/* Release memory and exit */
if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
LAPACKE_free( vr_t );
}
exit_level_2:
if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
LAPACKE_free( vl_t );
}
exit_level_1:
LAPACKE_free( t_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
}
return info;
}

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