Actually you can specify the numeric limits of the mantissa and the exponent. They can be specified as template arguments[0]. So you could do: Float<ui

Actually you can specify the numeric limits of the mantissa and the exponent. They can be specified as template arguments[0]. So you could do: Float<uint8_t, // type of the mantissa uint8_t, // type of the exponent 0, // lowest possible value of the mantissa 4095, // highest possible value of the mantissa 0, // lowest possible value of the exponent 7> // highest possible value of the exponent The Float then simulates an unsigned 12bit mantissa and a 3bit exponent. Sure it still takes 16 bytes. But you could create a union with bitfields where you shrink that even further. [0] https://github.com/clemensmanert/fas/blob/58f9effbe6c13ab334b05a956ec885edeac89fac/fas/float.hpp#L27 https://github.com/clemensmanert/fas/blob/58f9effbe6c13ab334...