sysdeps/s390/fpu/s_fma.c

   1 /* Compute x * y + z as ternary operation.  S/390 version.
   2    Copyright (C) 2010-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2010.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <math.h>
  21
  22 double
  23 __fma (double x, double y, double z)
  24 {
  25   double r;
  26   asm ("madbr %0,%1,%2" : "=f" (r) : "%f" (x), "fR" (y), "0" (z));
  27   return r;
  28 }
  29 #ifndef __fma
  30 weak_alias (__fma, fma)
  31 #endif
  32
  33 #ifdef NO_LONG_DOUBLE
  34 strong_alias (__fma, __fmal)
  35 weak_alias (__fmal, fmal)
  36 #endif