a value with the same numerical value as x but with the exponent of y
| InvalidOperationException | x is signaling NaN | 
| InvalidOperationException | only one of x or y is ±∞ | 
| InexactException | result is inexact | 
| x | y | quantize(x, y) | 
|---|---|---|
| NaN | any | NaN | 
| any | NaN | NaN | 
| ±∞ | ±∞ | ±∞ | 
| ±∞ | any | NaN | 
| any | ±∞ | NaN | 
Express a value using another value exponent