lapacke_sgerfs.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_sgerfs (int matrix_layout, char trans, lapack_int n, lapack_int nrhs, const float *a, lapack_int lda, const float *af, lapack_int ldaf, const lapack_int *ipiv, const float *b, lapack_int ldb, float *x, lapack_int ldx, float *ferr, float *berr)

Function Documentation

LAPACKE_sgerfs()

lapack_int LAPACKE_sgerfs	(	int	matrix_layout,
		char	trans,
		lapack_int	n,
		lapack_int	nrhs,
		const float *	a,
		lapack_int	lda,
		const float *	af,
		lapack_int	ldaf,
		const lapack_int *	ipiv,
		const float *	b,
		lapack_int	ldb,
		float *	x,
		lapack_int	ldx,
		float *	ferr,
		float *	berr )

Definition at line 35 of file lapacke_sgerfs.c.

{
    lapack_int info = 0;
    lapack_int* iwork = NULL;
    float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_sgerfs", -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, n, a, lda ) ) {
            return -5;
        }
        if( LAPACKE_sge_nancheck( matrix_layout, n, n, af, ldaf ) ) {
            return -7;
        }
        if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
            return -10;
        }
        if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
            return -12;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,3*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_sgerfs_work( matrix_layout, trans, n, nrhs, a, lda, af, ldaf,
                                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_sgerfs", info );
    }
    return info;
}