fp-special? ( x -- ? )
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Vocabulary
math

Inputs

x

a real

Outputs

?

a boolean

Word description
Tests if x is an IEEE special value (Not-a-Number or Infinity). While x can be any real number, this word will only ever yield true if x is a float.

See also
fp-nan?, fp-qnan?, fp-snan?, fp-infinity?, fp-nan-payload, <fp-nan>

Definition

IN: math

GENERIC: fp-special? ( x -- ? )

Methods

USING: kernel math ;

M: float fp-special?
    double>bits -52 shift 2047 [ bitand ] keep = ; inline


USING: kernel math ;

M: object fp-special? drop f ; inline