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

lapack_int LAPACKE_dbdsdc_work (int matrix_order, char uplo, char compq, lapack_int n, double *d, double *e, double *u, lapack_int ldu, double *vt, lapack_int ldvt, double *q, lapack_int *iq, double *work, lapack_int *iwork)

Function/Subroutine Documentation

lapack_int LAPACKE_dbdsdc_work ( int  matrix_order,
char  uplo,
char  compq,
lapack_int  n,
double *  d,
double *  e,
double *  u,
lapack_int  ldu,
double *  vt,
lapack_int  ldvt,
double *  q,
lapack_int iq,
double *  work,
lapack_int iwork 
)

Definition at line 36 of file lapacke_dbdsdc_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dbdsdc( &uplo, &compq, &n, d, e, u, &ldu, vt, &ldvt, q, iq, work,
iwork, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldu_t = MAX(1,n);
lapack_int ldvt_t = MAX(1,n);
double* u_t = NULL;
double* vt_t = NULL;
/* Check leading dimension(s) */
if( ldu < n ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_dbdsdc_work", info );
return info;
}
if( ldvt < n ) {
info = -10;
LAPACKE_xerbla( "LAPACKE_dbdsdc_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
if( LAPACKE_lsame( compq, 'i' ) ) {
u_t = (double*)LAPACKE_malloc( sizeof(double) * ldu_t * MAX(1,n) );
if( u_t == NULL ) {
goto exit_level_0;
}
}
if( LAPACKE_lsame( compq, 'i' ) ) {
vt_t = (double*)
LAPACKE_malloc( sizeof(double) * ldvt_t * MAX(1,n) );
if( vt_t == NULL ) {
goto exit_level_1;
}
}
/* Call LAPACK function and adjust info */
LAPACK_dbdsdc( &uplo, &compq, &n, d, e, u_t, &ldu_t, vt_t, &ldvt_t, q,
iq, work, iwork, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
if( LAPACKE_lsame( compq, 'i' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, u_t, ldu_t, u, ldu );
}
if( LAPACKE_lsame( compq, 'i' ) ) {
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, vt_t, ldvt_t, vt, ldvt );
}
/* Release memory and exit */
if( LAPACKE_lsame( compq, 'i' ) ) {
LAPACKE_free( vt_t );
}
exit_level_1:
if( LAPACKE_lsame( compq, 'i' ) ) {
LAPACKE_free( u_t );
}
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dbdsdc_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dbdsdc_work", info );
}
return info;
}

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