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[CRT:MATH] Implement _dsign and _dsignf

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This commit is contained in:
Timo Kreuzer 2025-05-07 19:58:10 +03:00
parent 0e5d6af68e
commit 50028685dc
4 changed files with 44 additions and 2 deletions
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20
sdk/lib/crt/math/_dsign.c Normal file
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/*
* PROJECT: ReactOS CRT
* LICENSE: MIT (https://spdx.org/licenses/MIT)
* PURPOSE: Implementation of _dsign.
* COPYRIGHT: Copyright 2025 Timo Kreuzer <timo.kreuzer@reactos.org>
*/
#include <math.h>
#include <stdint.h>
_Check_return_
int
__cdecl
_dsign(_In_ double _X)
{
union { double f; uint64_t ui64; } u = { _X };
// This is what Windows returns
return (u.ui64 >> 48) & 0x8000;
}