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

lapack_int LAPACKE_dggev_work (int matrix_order, char jobvl, char jobvr, lapack_int n, double *a, lapack_int lda, double *b, lapack_int ldb, double *alphar, double *alphai, double *beta, double *vl, lapack_int ldvl, double *vr, lapack_int ldvr, double *work, lapack_int lwork)

Function/Subroutine Documentation

lapack_int LAPACKE_dggev_work ( int  matrix_order,
char  jobvl,
char  jobvr,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  alphar,
double *  alphai,
double *  beta,
double *  vl,
lapack_int  ldvl,
double *  vr,
lapack_int  ldvr,
double *  work,
lapack_int  lwork 
)

Definition at line 36 of file lapacke_dggev_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dggev( &jobvl, &jobvr, &n, a, &lda, b, &ldb, alphar, alphai,
beta, vl, &ldvl, vr, &ldvr, work, &lwork, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int nrows_vl = LAPACKE_lsame( jobvl, 'v' ) ? n : 1;
lapack_int ncols_vl = LAPACKE_lsame( jobvl, 'v' ) ? n : 1;
lapack_int nrows_vr = LAPACKE_lsame( jobvr, 'v' ) ? n : 1;
lapack_int ncols_vr = LAPACKE_lsame( jobvr, 'v' ) ? n : 1;
lapack_int lda_t = MAX(1,n);
lapack_int ldb_t = MAX(1,n);
lapack_int ldvl_t = MAX(1,nrows_vl);
lapack_int ldvr_t = MAX(1,nrows_vr);
double* a_t = NULL;
double* b_t = NULL;
double* vl_t = NULL;
double* vr_t = NULL;
/* Check leading dimension(s) */
if( lda < n ) {
info = -6;
LAPACKE_xerbla( "LAPACKE_dggev_work", info );
return info;
}
if( ldb < n ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_dggev_work", info );
return info;
}
if( ldvl < ncols_vl ) {
info = -13;
LAPACKE_xerbla( "LAPACKE_dggev_work", info );
return info;
}
if( ldvr < ncols_vr ) {
info = -15;
LAPACKE_xerbla( "LAPACKE_dggev_work", info );
return info;
}
/* Query optimal working array(s) size if requested */
if( lwork == -1 ) {
LAPACK_dggev( &jobvl, &jobvr, &n, a, &lda_t, b, &ldb_t, alphar,
alphai, beta, vl, &ldvl_t, vr, &ldvr_t, work, &lwork,
&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( jobvl, 'v' ) ) {
vl_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,ncols_vl) );
if( vl_t == NULL ) {
goto exit_level_2;
}
}
if( LAPACKE_lsame( jobvr, 'v' ) ) {
vr_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,ncols_vr) );
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 );
/* Call LAPACK function and adjust info */
LAPACK_dggev( &jobvl, &jobvr, &n, a_t, &lda_t, b_t, &ldb_t, alphar,
alphai, beta, vl_t, &ldvl_t, vr_t, &ldvr_t, work, &lwork,
&info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
if( LAPACKE_lsame( jobvl, 'v' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, nrows_vl, ncols_vl, vl_t,
ldvl_t, vl, ldvl );
}
if( LAPACKE_lsame( jobvr, 'v' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, nrows_vr, ncols_vr, vr_t,
ldvr_t, vr, ldvr );
}
/* Release memory and exit */
if( LAPACKE_lsame( jobvr, 'v' ) ) {
LAPACKE_free( vr_t );
}
exit_level_3:
if( LAPACKE_lsame( jobvl, 'v' ) ) {
LAPACKE_free( vl_t );
}
exit_level_2:
LAPACKE_free( b_t );
exit_level_1:
LAPACKE_free( a_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dggev_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dggev_work", info );
}
return info;
}

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