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

lapack_int LAPACKE_dbdsdc (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)

Function/Subroutine Documentation

lapack_int LAPACKE_dbdsdc ( 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 
)

Definition at line 36 of file lapacke_dbdsdc.c.

{
lapack_int info = 0;
/* Additional scalars declarations for work arrays */
size_t lwork;
lapack_int* iwork = NULL;
double* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_dbdsdc", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_d_nancheck( n, d, 1 ) ) {
return -5;
}
if( LAPACKE_d_nancheck( n, e, 1 ) ) {
return -6;
}
#endif
/* Additional scalars initializations for work arrays */
if( LAPACKE_lsame( compq, 'i' ) ) {
lwork = (size_t)3*MAX(1,n)*MAX(1,n)+4*MAX(1,n);
} else if( LAPACKE_lsame( compq, 'p' ) ) {
lwork = MAX(1,6*n);
} else if( LAPACKE_lsame( compq, 'n' ) ) {
lwork = MAX(1,4*n);
} else {
lwork = 1; /* Any value */
}
/* Allocate memory for working array(s) */
iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,8*n) );
if( iwork == NULL ) {
goto exit_level_0;
}
work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
if( work == NULL ) {
goto exit_level_1;
}
/* Call middle-level interface */
info = LAPACKE_dbdsdc_work( matrix_order, uplo, compq, n, d, e, u, ldu, vt,
ldvt, q, iq, work, iwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_1:
LAPACKE_free( iwork );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_dbdsdc", info );
}
return info;
}

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