glibc/sysdeps/riscv/rvf/s_fmaxf.c

/* fmaxf().  RISC-V version.
   Copyright (C) 2017-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library.  If not, see
   <http://www.gnu.org/licenses/>.  */

#include <math.h>
#include <fenv_private.h>
#include <libm-alias-float.h>

float
__fmaxf (float x, float y)
{
  float res;

  if (__glibc_unlikely ((_FCLASS (x) | _FCLASS (y)) & _FCLASS_SNAN))
    return x + y;
  else
    asm ("fmax.s %0, %1, %2" : "=f" (res) : "f" (x), "f" (y));

  return res;
}
libm_alias_float (__fmax, fmax)