[SHELL/EXPERIMENTS]

* Create a branch for some evul shell experiments.

svn path=/branches/shell-experiments/; revision=61927

lib/sdk/crt/math/acos.c

@@ -0,0 +1,31 @@
+/* Math functions for i387.
+   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by John C. Bowman <bowman@ipp-garching.mpg.de>, 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#include <math.h>
+
+#ifdef _MSC_VER
+#pragma function(acos)
+#endif
+
+double acos(double __x)
+{
+    return atan2(sqrt(1.0 - __x * __x), __x);
+}