Extracts the exponent of x as a signed integral value.
If x is not a special value, the result is the same as
cast(int)logb(x).
Remarks: This function is consistent with IEEE754R, but it
differs from the C function of the same name
in the return value of infinity. (in C, ilogb(real.infinity)== int.max).
Note that the special return values may all be equal.
Extracts the exponent of x as a signed integral value.
If x is not a special value, the result is the same as cast(int)logb(x).
Remarks: This function is consistent with IEEE754R, but it differs from the C function of the same name in the return value of infinity. (in C, ilogb(real.infinity)== int.max). Note that the special return values may all be equal.