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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <math.h>
  21 #include <math_ldbl_opt.h>
  22
  23 double
  24 __fabs (double x)
  25 {
  26 #if __GNUC_PREREQ (2, 8)
  27   return __builtin_fabs (x);
  28 #else
  29   __asm ("cpys $f31, %1, %0" : "=f" (x) : "f" (x));
  30   return x;
  31 #endif
  32 }
  33
  34 weak_alias (__fabs, fabs)
  35 #ifdef NO_LONG_DOUBLE
  36 strong_alias (__fabs, __fabsl)
  37 weak_alias (__fabs, fabsl)
  38 #endif
  39 #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
  40 compat_symbol (libm, __fabs, fabsl, GLIBC_2_0);
  41 #endif