Naming conventions
==================

Files, functions, classes:
    eld: descriptor
    elx: exection functoin (stateless)
    elk: kernel function (stateless)
    elt: test

Numbering:
    Cardinal number
        // dimension (plain)
        n, ic, oc, ih, iw, oh, ow, kh, kw, t
        // blocked dimension
        ic2, oc2, ih2, iw2, oh2, ow2, t2 // blocked
        ic3, oc3, t3, ...                // 2nd level blocked
        // blocking unit, normally IV = OV = I = O
        V, A, T
        // 2nd/3rd level blocking unit
        I2, O2, I3, O3
    Ordinal number
        // dimension
        _n, _ic, _oc, _ih, _iw, _oh, _ow, _kh, _kw, ...
        // blocked dimension
        _ic2, _oc2, _ih2, _iw2, _oh2, _ow2, _t2 // blocked
        _ic3, _oc3, _t3, ...                    // 2nd level blocked
        // blocking unit
        _V, _T, _IV, _OV, _hA, _wA
        // 2nd/3rd level blocking unit
        _I2, _O2, _I3, _O3
    template:
        T: typename
        V: vector-size
        A: tile-size
        K: kernel-size

Tensor:
    // pointer type
    input, output, weights, bias
    // md-array
    ainput, aoutput, aweights
    // tensor for transform (from or to)
    tinput, toutput, tweights
    // transformed md-array
    atinput, atoutput, atweights