msvcrt: Make the sinh 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 sinh function NAN preserving.
11166aa0 · Martin Storsjo · Alexandre Julliard · 60d178b4 · 11166aa0
Commit 11166aa0 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
@@ -4046,6 +4046,7 @@ double CDECL sin( double x )
 double CDECL sinh( double x )
 {
    UINT64 ux = *(UINT64*)&x;
+    UINT64 sign = ux & 0x8000000000000000ULL;
    UINT32 w;
    double t, h, absx;

@@ -4070,7 +4071,10 @@ double CDECL sinh( double x )

    /* |x| > log(DBL_MAX) or nan */
    /* note: the result is stored to handle overflow */
-    t = __expo2(absx, 2 * h);
+    if (ux > 0x7ff0000000000000ULL)
+        *(UINT64*)&t = ux | sign | 0x0008000000000000ULL;
+    else
+        t = __expo2(absx, 2 * h);
    return t;
 }