sysdeps/alpha/fpu/s_fabs.c

   1 /* Copyright (C) 2000, 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Richard Henderson.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <math.h>
  20 #include <math_ldbl_opt.h>
  21
  22 double
  23 __fabs (double x)
  24 {
  25 #if __GNUC_PREREQ (2, 8)
  26   return __builtin_fabs (x);
  27 #else
  28   __asm ("cpys $f31, %1, %0" : "=f" (x) : "f" (x));
  29   return x;
  30 #endif
  31 }
  32
  33 weak_alias (__fabs, fabs)
  34 #ifdef NO_LONG_DOUBLE
  35 strong_alias (__fabs, __fabsl)
  36 weak_alias (__fabs, fabsl)
  37 #endif
  38 #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
  39 compat_symbol (libm, __fabs, fabsl, GLIBC_2_0);
  40 #endif