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Function std.math.logb

Extracts the exponent of x as a signed integral value.

If x is subnormal, it is treated as if it were normalized. For a positive, finite x:

1 <= x * FLT_RADIX-logb(x) < FLT_RADIX

x logb(x) divide by 0? ±∞ +∞ no ±0.0 -∞ yes

Prototype

real logb(
  real x
) nothrow @nogc @trusted;

Authors

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

License

Boost License 1.0.

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