sysdeps/riscv/rvf/s_fmaxf.c

   1 /* fmaxf().  RISC-V version.
   2    Copyright (C) 2017-2023 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 #include <math.h>
  20 #include <fenv_private.h>
  21 #include <libm-alias-float.h>
  22
  23 float
  24 __fmaxf (float x, float y)
  25 {
  26   float res;
  27
  28   if (__glibc_unlikely ((_FCLASS (x) | _FCLASS (y)) & _FCLASS_SNAN))
  29     return x + y;
  30   else
  31     asm ("fmax.s %0, %1, %2" : "=f" (res) : "f" (x), "f" (y));
  32
  33   return res;
  34 }
  35 libm_alias_float (__fmax, fmax)