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

lapack_int LAPACKE_dgbtrf_work (int matrix_order, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, double *ab, lapack_int ldab, lapack_int *ipiv)

Function/Subroutine Documentation

lapack_int LAPACKE_dgbtrf_work ( int  matrix_order,
lapack_int  m,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
double *  ab,
lapack_int  ldab,
lapack_int ipiv 
)

Definition at line 36 of file lapacke_dgbtrf_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dgbtrf( &m, &n, &kl, &ku, ab, &ldab, ipiv, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldab_t = MAX(1,2*kl+ku+1);
double* ab_t = NULL;
/* Check leading dimension(s) */
if( ldab < n ) {
info = -7;
LAPACKE_xerbla( "LAPACKE_dgbtrf_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
if( ab_t == NULL ) {
goto exit_level_0;
}
/* Transpose input matrices */
LAPACKE_dgb_trans( matrix_order, m, n, kl, kl+ku, ab, ldab, ab_t,
ldab_t );
/* Call LAPACK function and adjust info */
LAPACK_dgbtrf( &m, &n, &kl, &ku, ab_t, &ldab_t, ipiv, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_dgb_trans( LAPACK_COL_MAJOR, m, n, kl, kl+ku, ab_t, ldab_t, ab,
ldab );
/* Release memory and exit */
LAPACKE_free( ab_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dgbtrf_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dgbtrf_work", info );
}
return info;
}

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