sysdeps/riscv/rvd/s_fma.c

   1 /* Double precision floating point fused multiply-add.  RISC-V version.
   2    Copyright (C) 2017-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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    <https://www.gnu.org/licenses/>.  */
  18
  19 #define NO_MATH_REDIRECT
  20 #define dfmal __hide_dfmal
  21 #define f32xfmaf64 __hide_f32xfmaf64
  22 #include <math.h>
  23 #undef dfmal
  24 #undef f32xfmaf64
  25 #include <fenv.h>
  26 #include <ieee754.h>
  27 #include <libm-alias-double.h>
  28 #include <math-narrow-alias.h>
  29
  30 double
  31 __fma (double x, double y, double z)
  32 {
  33   asm ("fmadd.d %0, %1, %2, %3" : "=f" (x) : "f" (x), "f" (y), "f" (z));
  34   return x;
  35 }
  36 libm_alias_double (__fma, fma)
  37 libm_alias_double_narrow (__fma, fma)