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Function std.math.ilogb

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).

x ilogb(x) Range error? 0 FP_ILOGB0 yes ±∞ int.max no FP_ILOGBNAN no

Prototype

int ilogb(T)(
  T x
) pure nothrow @nogc @trusted
if (isFloatingPoint!T);

Authors

Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw

License

Boost License 1.0.

Comments