sysdeps/s390/fpu/s_fma.c

   1 /* Compute x * y + z as ternary operation.  S/390 version.
   2    Copyright (C) 2010 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <math.h>
  22
  23 double
  24 __fma (double x, double y, double z)
  25 {
  26   double r;
  27   asm ("madbr %0,%1,%2" : "=f" (r) : "%f" (x), "fR" (y), "0" (z));
  28   return r;
  29 }
  30 #ifndef __fma
  31 weak_alias (__fma, fma)
  32 #endif
  33
  34 #ifdef NO_LONG_DOUBLE
  35 strong_alias (__fma, __fmal)
  36 weak_alias (__fmal, fmal)
  37 #endif