enable f16;
var<private> u : mat4x3<f16> = mat4x3<f16>(mat4x3<f32>(1.0f, 2.0f, 3.0f,
                                                       4.0f, 5.0f, 6.0f,
                                                       7.0f, 8.0f, 9.0f,
                                                       10.0f, 11.0f, 12.0f));