Function inv

numpy/linalg/umath_linalg.cpp:1810–1843

template<typename typ>
static void
inv(char **args, npy_intp const *dimensions, npy_intp const *steps,
           void *NPY_UNUSED(func))
{
using ftyp = fortran_type_t<typ>;
    GESV_PARAMS_t<ftyp> params;
    fortran_int n;
    int error_occurred = get_fp_invalid_and_clear();
    INIT_OUTER_LOOP_2

    n = (fortran_int)dimensions[0];
    if (init_gesv(&params, n, n)) {
        LINEARIZE_DATA_t a_in, r_out;
        init_linearize_data(&a_in, n, n, steps[1], steps[0]);
        init_linearize_data(&r_out, n, n, steps[3], steps[2]);

        BEGIN_OUTER_LOOP_2
            int not_ok;
            linearize_matrix((typ*)params.A, (typ*)args[0], &a_in);
            identity_matrix((typ*)params.B, n);
            not_ok = call_gesv(&params);
            if (!not_ok) {
                delinearize_matrix((typ*)args[1], (typ*)params.B, &r_out);
            } else {
                error_occurred = 1;
                nan_matrix((typ*)args[1], &r_out);
            }
        END_OUTER_LOOP

        release_gesv(&params);
    }

    set_fp_invalid_or_clear(error_occurred);
}


/* -------------------------------------------------------------------------- */