pub fn exp2_q16(x: i64) -> u32Expand description
2^x in 16.16 fixed point (1 << 16 is 1), for x in 16.16 at most
0; a positive x counts as 0. The whole part is a shift, the fraction
comes from a 16-entry table, read straight between its entries. More
than 32 halvings down is 0.