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

/* 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;
}