x * 2^pw2, computed exactly by exponent arithmetic (the inverse of frexp). An exponent beyond the range gives infinity or zero (with the sign of x), and the final underflow rounds once. Zero, infinities and NaN are returned unchanged. Only float64.
assert(ldexp(cast(float64) 0.5, 4) == 8);
assert(ldexp(cast(float64) 3, -1) == 1.5);
assert(isinf(ldexp(cast(float64) 1, 2000)));ldexp :: (x: float64, pw2: s32) -> float64x * 2^pw2.
Parameters
- x: float64
- the value to scale.
- pw2: s32
- the power of two to scale by.
Returns
- float64