From 60d178b410ba943c6c39b2ccf1deaec264d7d21a Mon Sep 17 00:00:00 2001 From: Martin Storsjo Date: Wed, 28 Jul 2021 14:42:09 +0200 Subject: [PATCH] msvcrt: Make the cosh function NAN preserving. Signed-off-by: Martin Storsjo Signed-off-by: Piotr Caban Signed-off-by: Alexandre Julliard --- dlls/msvcrt/math.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c index a902d4f04b9..2bd4206359b 100644 --- a/dlls/msvcrt/math.c +++ b/dlls/msvcrt/math.c @@ -2776,6 +2776,7 @@ static double __expo2(double x, double sign) double CDECL cosh( double x ) { UINT64 ux = *(UINT64*)&x; + UINT64 sign = ux & 0x8000000000000000ULL; UINT32 w; double t; @@ -2803,7 +2804,10 @@ double CDECL cosh( double x ) /* |x| > log(DBL_MAX) or nan */ /* note: the result is stored to handle overflow */ - t = __expo2(x, 1.0); + if (ux > 0x7ff0000000000000ULL) + *(UINT64*)&t = ux | sign | 0x0008000000000000ULL; + else + t = __expo2(x, 1.0); return t; }