msvcrt: Make the coshf function NAN preserving.

Signed-off-by: Martin Storsjo <martin@martin.st> Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

msvcrt: Make the coshf function NAN preserving.
36114325 · Martin Storsjo · Alexandre Julliard · 85e934e4 · 36114325
Commit 36114325 authored Jul 28, 2021 by Martin Storsjo Committed by Alexandre Julliard Jul 28, 2021
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math.c dlls/msvcrt/math.c +5 -1

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--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -1137,6 +1137,7 @@ static float __expo2f(float x, float sign)
 float CDECL coshf( float x )
 {
    UINT32 ui = *(UINT32*)&x;
+    UINT32 sign = ui & 0x80000000;
    float t;

    /* |x| */
@@ -1160,7 +1161,10 @@ float CDECL coshf( float x )
    }

    /* |x| > log(FLT_MAX) or nan */
-    t = __expo2f(x, 1.0f);
+    if (ui > 0x7f800000)
+        *(UINT32*)&t = ui | sign | 0x400000;
+    else
+        t = __expo2f(x, 1.0f);
    return t;
 }