The object representation for floating-point values is implementation defined. However, an implementation that defines the __STDC_IEC_559__ macro shall conform to the IEC 60559 floating-point standard and uses what is frequently referred to as IEEE 754 floating-point arithmetic [ISO/IEC 9899:20112024]. The floating-point object representation used by IEC 60559 is one of the most common floating-point object representations in use today.
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Bibliography
| [ISO/IEC 9899:20112024] | Annex F, "ISO/IEC 60559 floating-point arithmetic" |
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