lapacke_slascl.c

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* Contents: Native high-level C interface to LAPACK function slaswp
* Author: Intel Corporation
* Generated June 2016
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_slascl( int matrix_layout, char type, lapack_int kl,
                           lapack_int ku, float cfrom, float cto,
                           lapack_int m, lapack_int n, float* a,
                           lapack_int lda )
{
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_slascl", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    switch (type) {
    case 'G':
        if( LAPACKE_sge_nancheck( matrix_layout, m, n, a, lda ) ) {
            return -9;
        }
        break;
    case 'L':
        // TYPE = 'L' - lower triangle of general matrix
        if( matrix_layout == LAPACK_COL_MAJOR &&
            LAPACKE_sgb_nancheck( matrix_layout, m, n, m-1, 0, a, lda+1 ) ) {
            return -9;
        }
        if( matrix_layout == LAPACK_ROW_MAJOR &&
            LAPACKE_sgb_nancheck( LAPACK_COL_MAJOR, n, m, 0, m-1, a-m+1, lda+1 ) ) {
            return -9;
        }
        break;
    case 'U':
        // TYPE = 'U' - upper triangle of general matrix
        if( matrix_layout == LAPACK_COL_MAJOR &&
            LAPACKE_sgb_nancheck( matrix_layout, m, n, 0, n-1, a-n+1, lda+1 ) ) {
            return -9;
        }
        if( matrix_layout == LAPACK_ROW_MAJOR &&
            LAPACKE_sgb_nancheck( LAPACK_COL_MAJOR, n, m, n-1, 0, a, lda+1 ) ) {
            return -9;
        }
        break;
    case 'H':
        // TYPE = 'H' - part of upper Hessenberg matrix in general matrix
        if( matrix_layout == LAPACK_COL_MAJOR &&
            LAPACKE_sgb_nancheck( matrix_layout, m, n, 1, n-1, a-n+1, lda+1 ) ) {
            return -9;
        }
        if( matrix_layout == LAPACK_ROW_MAJOR &&
            LAPACKE_sgb_nancheck( LAPACK_COL_MAJOR, n, m, n-1, 1, a-1, lda+1 ) ) {
            return -9;
        }
    case 'B':
        // TYPE = 'B' - lower part of symmetric band matrix (assume m==n)
        if( LAPACKE_ssb_nancheck( matrix_layout, 'L', n, kl, a, lda ) ) {
            return -9;
        }
        break;
    case 'Q':
        // TYPE = 'Q' - upper part of symmetric band matrix (assume m==n)
        if( LAPACKE_ssb_nancheck( matrix_layout, 'U', n, ku, a, lda ) ) {
            return -9;
        }
        break;
    case 'Z':
        // TYPE = 'Z' -  band matrix laid out for ?GBTRF
        if( matrix_layout == LAPACK_COL_MAJOR &&
            LAPACKE_sgb_nancheck( matrix_layout, m, n, kl, ku, a+kl, lda ) ) {
            return -9;
        }
        if( matrix_layout == LAPACK_ROW_MAJOR &&
            LAPACKE_sgb_nancheck( matrix_layout, m, n, kl, ku, a+lda*kl, lda ) ) {
            return -9;
        }
        break;
    }
#endif
    return LAPACKE_slascl_work( matrix_layout, type, kl, ku, cfrom, cto, m,  n, a, lda );
}