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

lapack_int LAPACKE_dgtrfs (int matrix_order, char trans, lapack_int n, lapack_int nrhs, const double *dl, const double *d, const double *du, const double *dlf, const double *df, const double *duf, const double *du2, const lapack_int *ipiv, const double *b, lapack_int ldb, double *x, lapack_int ldx, double *ferr, double *berr)

Function/Subroutine Documentation

lapack_int LAPACKE_dgtrfs ( int  matrix_order,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const double *  dl,
const double *  d,
const double *  du,
const double *  dlf,
const double *  df,
const double *  duf,
const double *  du2,
const lapack_int ipiv,
const double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  ferr,
double *  berr 
)

Definition at line 36 of file lapacke_dgtrfs.c.

{
lapack_int info = 0;
lapack_int* iwork = NULL;
double* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_dgtrfs", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_dge_nancheck( matrix_order, n, nrhs, b, ldb ) ) {
return -13;
}
if( LAPACKE_d_nancheck( n, d, 1 ) ) {
return -6;
}
if( LAPACKE_d_nancheck( n, df, 1 ) ) {
return -9;
}
if( LAPACKE_d_nancheck( n-1, dl, 1 ) ) {
return -5;
}
if( LAPACKE_d_nancheck( n-1, dlf, 1 ) ) {
return -8;
}
if( LAPACKE_d_nancheck( n-1, du, 1 ) ) {
return -7;
}
if( LAPACKE_d_nancheck( n-2, du2, 1 ) ) {
return -11;
}
if( LAPACKE_d_nancheck( n-1, duf, 1 ) ) {
return -10;
}
if( LAPACKE_dge_nancheck( matrix_order, n, nrhs, x, ldx ) ) {
return -15;
}
#endif
/* Allocate memory for working array(s) */
iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
if( iwork == NULL ) {
goto exit_level_0;
}
work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
if( work == NULL ) {
goto exit_level_1;
}
/* Call middle-level interface */
info = LAPACKE_dgtrfs_work( matrix_order, trans, n, nrhs, dl, d, du, dlf,
df, duf, du2, ipiv, b, ldb, x, ldx, ferr, berr,
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_dgtrfs", info );
}
return info;
}

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