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msvcrt: Import _copysign() from musl. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2020-11-17 09:57:52 +01:00
parent d53577ef75
commit b1bc99f025
1 changed files with 14 additions and 8 deletions
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22
dlls/msvcrt/math.c
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@ -177,12 +177,15 @@ float CDECL MSVCRT__chgsignf( float num )
/*********************************************************************
* _copysignf (MSVCRT.@)
*
* Copied from musl: src/math/copysignf.c
*/
float CDECL MSVCRT__copysignf( float num, float sign )
float CDECL MSVCRT__copysignf( float x, float y )
{
if (signbit(sign))
return signbit(num) ? num : -num;
return signbit(num) ? -num : num;
union { float f; UINT32 i; } ux = { x }, uy = { y };
ux.i &= 0x7fffffff;
ux.i |= uy.i & 0x80000000;
return ux.f;
}
/*********************************************************************
@ -2126,12 +2129,15 @@ int CDECL MSVCRT_fesetround(int round_mode)
/*********************************************************************
* _copysign (MSVCRT.@)
*
* Copied from musl: src/math/copysign.c
*/
double CDECL MSVCRT__copysign(double num, double sign)
double CDECL MSVCRT__copysign( double x, double y )
{
if (signbit(sign))
return signbit(num) ? num : -num;
return signbit(num) ? -num : num;
union { double f; UINT64 i; } ux = { x }, uy = { y };
ux.i &= ~0ull >> 1;
ux.i |= uy.i & 1ull << 63;
return ux.f;
}
/*********************************************************************