// fixed_point = clamp(clamp_min, clamp_max, (
    //   roundHalfToEven(expressed / scale) + zero_point))
    APFloat scaled = (expressed_value / scale_);
    scaled.roundToIntegral(round_mode_);
    scaled.add(zero_point_, round_mode_);
    APFloat fixed_point = llvm::minimum(scaled, clamp_max_);
    fixed_point = llvm::maximum(fixed_point, clamp_min_);

// or of a difference x−y regarded as a sum x+(−y), differs from at most
// one of the addends’ signs; and the sign of the result of conversions,
// the quantize operation, the roundToIntegral operations, and the
// roundToIntegralExact (see 5.3.1) is the sign of the first or only operand.
// These rules shall apply even when operands or results are zero or infinite.
//