lapacke_dsgesv.c

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* Contents: Native high-level C interface to LAPACK function dsgesv
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_dsgesv( int matrix_layout, lapack_int n, lapack_int nrhs,
                           double* a, lapack_int lda, lapack_int* ipiv,
                           double* b, lapack_int ldb, double* x, lapack_int ldx,
                           lapack_int* iter )
{
    lapack_int info = 0;
    float* swork = NULL;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dsgesv", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
            return -4;
        }
        if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
            return -7;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    swork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,n) * MAX(1,n+nrhs) );
    if( swork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) * MAX(1,nrhs) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dsgesv_work( matrix_layout, n, nrhs, a, lda, ipiv, b, ldb, x,
                                ldx, work, swork, iter );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( swork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_dsgesv", info );
    }
    return info;
}