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18 lines
401 B
C
18 lines
401 B
C
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/*
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* PROJECT: ReactOS CRT
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* LICENSE: MIT (https://spdx.org/licenses/MIT)
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* PURPOSE: Implementation of _isnan.
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* COPYRIGHT: Copyright 2025 Timo Kreuzer <timo.kreuzer@reactos.org>
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*/
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#include <float.h>
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#include <stdint.h>
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int
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__cdecl
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_isnan(_In_ double _X)
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{
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union { double f; uint64_t ui64; } u = { _X };
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return (u.ui64 & ~0x8000000000000000ull) > 0x7FF0000000000000ull;
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}
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