sysdeps/ieee754/dbl-64/s_fsub.c

   1 /* Subtract double values, narrowing the result to float.
   2    Copyright (C) 2018-2023 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 f32subf64 __hide_f32subf64
  20 #define f32subf32x __hide_f32subf32x
  21 #define fsubl __hide_fsubl
  22 #include <math.h>
  23 #undef f32subf64
  24 #undef f32subf32x
  25 #undef fsubl
  26
  27 #include <math-narrow.h>
  28
  29 float
  30 __fsub (double x, double y)
  31 {
  32   NARROW_SUB_ROUND_TO_ODD (x, y, float, union ieee754_double, , mantissa1);
  33 }
  34 libm_alias_float_double (sub)