Create a branch for header work.

svn path=/branches/header-work/; revision=45691

lib/sdk/crt/math/i386/ldexp.c

@@ -0,0 +1,44 @@
+/* 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>
+
+double ldexp (double __x, int __y);
+
+double ldexp (double __x, int __y)
+{
+  register double __val;
+#ifdef __GNUC__
+  __asm __volatile__
+    ("fscale"
+     : "=t" (__val) : "0" (__x), "u" ((double) __y));
+#else
+  register double __dy = (double)__y;
+  __asm
+  {
+    fld __dy
+    fld __x
+    fscale
+    fstp __val
+  }
+#endif /*__GNUC__*/
+  return __val;
+}