getrf.cc (flens/lapack/interface/src/getrf.cc)

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#include <flens/lapack/interface/include/config.h>

namespace flens { namespace lapack {

extern "C" {

//-- dgetrf --------------------------------------------------------------------
void
LAPACK_DECL(dgetrf)(const INTEGER    *M,
                    const INTEGER    *N,
                    DOUBLE           *A,
                    const INTEGER    *LDA,
                    INTEGER          *IPIV,
                    INTEGER          *INFO)
{
    using std::min;

//
//  Test the input parameters so that we pass LAPACK error checks
//
    *INFO = 0;
    if (*M<0) {
        *INFO = -1;
    } else if (*N<0) {
        *INFO = -2;
    } else if (*LDA<std::max(INTEGER(1), *M)) {
        *INFO = -4;
    }
    if (*INFO!=0) {
        *INFO = -(*INFO);
        LAPACK_ERROR("DGETRF", INFO);
        *INFO = -(*INFO);
        return;
    }
//
//  Call FLENS implementation
//
    INTEGER MN = min(*M,*N);

    DGeMatrixView       _A      = DFSView(*M, *N, A, *LDA);
    IDenseVectorView    _IPIV   = IArrayView(MN, IPIV, 1);

    *INFO = trf(_A, _IPIV);
}

//-- zgetrf --------------------------------------------------------------------
void
LAPACK_DECL(zgetrf)(const INTEGER    *M,
                    const INTEGER    *N,
                    DOUBLE_COMPLEX   *A,
                    const INTEGER    *LDA,
                    INTEGER          *IPIV,
                    INTEGER          *INFO)
{
    using std::min;

//
//  Test the input parameters so that we pass LAPACK error checks
//
    *INFO = 0;
    if (*M<0) {
        *INFO = -1;
    } else if (*N<0) {
        *INFO = -2;
    } else if (*LDA<std::max(INTEGER(1), *M)) {
        *INFO = -4;
    }
    if (*INFO!=0) {
        *INFO = -(*INFO);
        LAPACK_ERROR("ZGETRF", INFO);
        *INFO = -(*INFO);
        return;
    }
//
//  Call FLENS implementation
//
    auto zA = reinterpret_cast<CXX_DOUBLE_COMPLEX *>(A);
    INTEGER MN = min(*M,*N);

    ZGeMatrixView    _A    = ZFSView(*M, *N, zA, *LDA);
    IDenseVectorView _IPIV = IArrayView(MN, IPIV, 1);

    *INFO = trf(_A, _IPIV);
}

} // extern "C"

} } // namespace lapack, flens