msvcrt: Fix the fallback implementation of asinh for large negative values.

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: Fix the fallback implementation of asinh for large negative values.
fc110738 · Martin Storsjo · Alexandre Julliard · e40dd74d · fc110738
Commit fc110738 authored Apr 23, 2019 by Martin Storsjo Committed by Alexandre Julliard Apr 25, 2019
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math.c dlls/msvcrt/math.c +4 -1

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--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -3063,7 +3063,10 @@ double CDECL MSVCR120_asinh(double x)
 #ifdef HAVE_ASINH
    return asinh(x);
 #else
-    if (!isfinite(x*x+1)) return log(2) + log(x);
+    if (!isfinite(x*x+1)) {
+      if (x > 0) return log(2) + log(x);
+      else return -log(2) - log(-x);
+    }
    return log(x + sqrt(x*x+1));
 #endif
 }