Definition of the Flexible Image Transport System (FITS), version 3.0

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Volume 524 (December 2010)

A&A, 524 (2010) A42

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Table E.2

IEEE floating-point formats.

IEEE value	Double precision	Single precision

+0	0000000000000000	00000000
denormalized	0000000000000001	00000001
	to	to
	000FFFFFFFFFFFFF	007FFFFF
positive underflow	0010000000000000	00800000
positive numbers	0010000000000001	00800001
	to	to
	7FEFFFFFFFFFFFFE	7F7FFFFE
positive overflow	7FEFFFFFFFFFFFFF	7F7FFFFF
+∞	7FF0000000000000	7F800000
NaN¹>	7FF0000000000001	7F800001
	to	to
	7FFFFFFFFFFFFFFF	7FFFFFFF
−0	8000000000000000	80000000
negative	8000000000000001	80000001
denormalized	to	to
	800FFFFFFFFFFFFF	807FFFFF
negative underflow	8010000000000000	80800000
negative numbers	8010000000000001	80800001
	to	to
	FFEFFFFFFFFFFFFE	FF7FFFFE
negative overflow	FFEFFFFFFFFFFFFF	FF7FFFFF
−∞	FFF0000000000000	FF800000
NaN¹>	FFF0000000000001	FF800001
	to	to
	FFFFFFFFFFFFFFFF	FFFFFFFF

Notes.

⁽¹⁾

Certain values may be designated as quiet NaN (no diagnostic when used) or signaling (produces diagnostic when used) by particular implementations.

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