libphobos/testsuite/libphobos.phobos/std_math_hardware.d

@safe unittest
{
    import std.math.hardware;

    import std.math.rounding : lrint;

    FloatingPointControl fpctrl;

    fpctrl.rounding = FloatingPointControl.roundDown;
    assert(lrint(1.5) == 1.0);

    fpctrl.rounding = FloatingPointControl.roundUp;
    assert(lrint(1.4) == 2.0);

    fpctrl.rounding = FloatingPointControl.roundToNearest;
    assert(lrint(1.5) == 2.0);
}