lapacke_cherfs.c

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*****************************************************************************
* Contents: Native high-level C interface to LAPACK function cherfs
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_cherfs( int matrix_layout, char uplo, lapack_int n,
                           lapack_int nrhs, const lapack_complex_float* a,
                           lapack_int lda, const lapack_complex_float* af,
                           lapack_int ldaf, const lapack_int* ipiv,
                           const lapack_complex_float* b, lapack_int ldb,
                           lapack_complex_float* x, lapack_int ldx, float* ferr,
                           float* berr )
{
    lapack_int info = 0;
    float* rwork = NULL;
    lapack_complex_float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_cherfs", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_che_nancheck( matrix_layout, uplo, n, a, lda ) ) {
            return -5;
        }
        if( LAPACKE_che_nancheck( matrix_layout, uplo, n, af, ldaf ) ) {
            return -7;
        }
        if( LAPACKE_cge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
            return -10;
        }
        if( LAPACKE_cge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
            return -12;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,n) );
    if( rwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (lapack_complex_float*)
        LAPACKE_malloc( sizeof(lapack_complex_float) * MAX(1,2*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_cherfs_work( matrix_layout, uplo, n, nrhs, a, lda, af, ldaf,
                                ipiv, b, ldb, x, ldx, ferr, berr, work, rwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( rwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_cherfs", info );
    }
    return info;
}