__fpclassifyf

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
  1. int __fpclassifyf(float x)
  2. int __fpclassifyf(float x)
  3. int __fpclassifyf(float )
    version(!DigitalMarsWin32 && !linux && !darwin && FreeBSD)
    extern (C)
    int
    __fpclassifyf
    (
    float
    )

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