lapacke_sptrfs.c

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* Contents: Native high-level C interface to LAPACK function sptrfs
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_sptrfs( int matrix_layout, lapack_int n, lapack_int nrhs,
                           const float* d, const float* e, const float* df,
                           const float* ef, const float* b, lapack_int ldb,
                           float* x, lapack_int ldx, float* ferr, float* berr )
{
    lapack_int info = 0;
    float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_sptrfs", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
            return -8;
        }
        if( LAPACKE_s_nancheck( n, d, 1 ) ) {
            return -4;
        }
        if( LAPACKE_s_nancheck( n, df, 1 ) ) {
            return -6;
        }
        if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
            return -5;
        }
        if( LAPACKE_s_nancheck( n-1, ef, 1 ) ) {
            return -7;
        }
        if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
            return -10;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,2*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Call middle-level interface */
    info = LAPACKE_sptrfs_work( matrix_layout, n, nrhs, d, e, df, ef, b, ldb, x,
                                ldx, ferr, berr, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_sptrfs", info );
    }
    return info;
}