sysdeps/loongarch/fpu/s_fminimum_mag_num.c

   1 /* fminimum_mag_num().  LoongArch version.
   2    Copyright (C) 2022-2023 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 #define NO_MATH_REDIRECT
  20 #include <math.h>
  21 #include <libm-alias-double.h>
  22 #include <fpu_control.h>
  23
  24 double
  25 __fminimum_mag_num (double x, double y)
  26 {
  27   int x_cond;
  28   int y_cond;
  29   asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
  30   asm volatile ("fclass.d \t%0, %1" : "=f" (y_cond) : "f" (y));
  31
  32   if (__glibc_unlikely((x_cond & _FCLASS_NAN) && !(y_cond & _FCLASS_NAN)))
  33     {
  34       asm volatile ("fmina.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
  35       return y;
  36     }
  37   else if (__glibc_unlikely(!(x_cond & _FCLASS_NAN) && (y_cond & _FCLASS_NAN)))
  38     {
  39       asm volatile ("fmina.d \t%0, %1, %2" : "=f" (y) : "f" (x), "f" (y));
  40       return x;
  41     }
  42   else
  43     {
  44       asm volatile ("fmina.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
  45       return x;
  46     }
  47 }
  48 libm_alias_double (__fminimum_mag_num, fminimum_mag_num)