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

lapack_int LAPACKE_dgeevx_work (int matrix_order, char balanc, char jobvl, char jobvr, char sense, lapack_int n, double *a, lapack_int lda, double *wr, double *wi, double *vl, lapack_int ldvl, double *vr, lapack_int ldvr, lapack_int *ilo, lapack_int *ihi, double *scale, double *abnrm, double *rconde, double *rcondv, double *work, lapack_int lwork, lapack_int *iwork)

Function/Subroutine Documentation

lapack_int LAPACKE_dgeevx_work ( int  matrix_order,
char  balanc,
char  jobvl,
char  jobvr,
char  sense,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  wr,
double *  wi,
double *  vl,
lapack_int  ldvl,
double *  vr,
lapack_int  ldvr,
lapack_int ilo,
lapack_int ihi,
double *  scale,
double *  abnrm,
double *  rconde,
double *  rcondv,
double *  work,
lapack_int  lwork,
lapack_int iwork 
)

Definition at line 36 of file lapacke_dgeevx_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dgeevx( &balanc, &jobvl, &jobvr, &sense, &n, a, &lda, wr, wi, vl,
&ldvl, vr, &ldvr, ilo, ihi, scale, abnrm, rconde, rcondv,
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 ldvl_t = MAX(1,n);
lapack_int ldvr_t = MAX(1,n);
double* a_t = NULL;
double* vl_t = NULL;
double* vr_t = NULL;
/* Check leading dimension(s) */
if( lda < n ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_dgeevx_work", info );
return info;
}
if( ldvl < n ) {
info = -12;
LAPACKE_xerbla( "LAPACKE_dgeevx_work", info );
return info;
}
if( ldvr < n ) {
info = -14;
LAPACKE_xerbla( "LAPACKE_dgeevx_work", info );
return info;
}
/* Query optimal working array(s) size if requested */
if( lwork == -1 ) {
LAPACK_dgeevx( &balanc, &jobvl, &jobvr, &sense, &n, a, &lda_t, wr,
wi, vl, &ldvl_t, vr, &ldvr_t, ilo, ihi, scale, abnrm,
rconde, rcondv, 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;
}
if( LAPACKE_lsame( jobvl, 'v' ) ) {
vl_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,n) );
if( vl_t == NULL ) {
goto exit_level_1;
}
}
if( LAPACKE_lsame( jobvr, 'v' ) ) {
vr_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,n) );
if( vr_t == NULL ) {
goto exit_level_2;
}
}
/* Transpose input matrices */
LAPACKE_dge_trans( matrix_order, n, n, a, lda, a_t, lda_t );
/* Call LAPACK function and adjust info */
LAPACK_dgeevx( &balanc, &jobvl, &jobvr, &sense, &n, a_t, &lda_t, wr, wi,
vl_t, &ldvl_t, vr_t, &ldvr_t, ilo, ihi, scale, abnrm,
rconde, rcondv, work, &lwork, iwork, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
if( LAPACKE_lsame( jobvl, 'v' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, vl_t, ldvl_t, vl, ldvl );
}
if( LAPACKE_lsame( jobvr, 'v' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, vr_t, ldvr_t, vr, ldvr );
}
/* Release memory and exit */
if( LAPACKE_lsame( jobvr, 'v' ) ) {
LAPACKE_free( vr_t );
}
exit_level_2:
if( LAPACKE_lsame( jobvl, 'v' ) ) {
LAPACKE_free( vl_t );
}
exit_level_1:
LAPACKE_free( a_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dgeevx_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dgeevx_work", info );
}
return info;
}

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