Display the source code in std/math.d from which this page was generated on github.

If you spot a problem with this page, click here to create a Bugzilla issue.

Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Function `std.math.isSubnormal`

Determines if x is subnormal.


						
				bool isSubnormal(X)
				(
				

				  X x
				

				) pure nothrow @nogc @trusted;

Subnormals (also known as "denormal number"), have a 0 exponent and a 0 most significant mantissa bit.

Parameters

Name	Description
x	a floating point number.

Returns

true if x is a denormal number.

Example

import std.meta : AliasSeq;

static foreach (T; AliasSeq!(float, double, real))
{{
    T f;
    for (f = 1.0; !isSubnormal(f); f /= 2)
        assert(f != 0);
}}

Authors

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

License

Boost License 1.0.