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msvcrt: Import ceil implementation from musl.
Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
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@ -1740,10 +1740,31 @@ float CDECL _hypotf(float x, float y)
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/*********************************************************************
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* ceil (MSVCRT.@)
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*
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* Based on musl: src/math/ceilf.c
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*/
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double CDECL ceil( double x )
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{
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return unix_funcs->ceil(x);
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union {double f; UINT64 i;} u = {x};
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int e = (u.i >> 52 & 0x7ff) - 0x3ff;
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UINT64 m;
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if (e >= 52)
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return x;
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if (e >= 0) {
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m = 0x000fffffffffffffULL >> e;
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if ((u.i & m) == 0)
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return x;
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if (u.i >> 63 == 0)
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u.i += m;
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u.i &= ~m;
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} else {
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if (u.i >> 63)
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return -0.0;
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else if (u.i << 1)
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return 1.0;
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}
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return u.f;
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}
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/*********************************************************************
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@ -121,14 +121,6 @@ static float CDECL unix_atanhf(float x)
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#endif
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}
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/*********************************************************************
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* ceil
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*/
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static double CDECL unix_ceil( double x )
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{
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return ceil( x );
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}
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/*********************************************************************
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* ceilf
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*/
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@ -713,7 +705,6 @@ static const struct unix_funcs funcs =
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unix_asinhf,
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unix_atanh,
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unix_atanhf,
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unix_ceil,
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unix_ceilf,
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unix_cos,
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unix_cosf,
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@ -29,7 +29,6 @@ struct unix_funcs
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float (CDECL *asinhf)(float x);
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double (CDECL *atanh)(double x);
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float (CDECL *atanhf)(float x);
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double (CDECL *ceil)(double x);
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float (CDECL *ceilf)(float x);
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double (CDECL *cos)(double x);
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float (CDECL *cosf)(float x);
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