sysdeps/ieee754/ldbl-96/s_dsubl.c

   1 /* Subtract long double (ldbl-96) values, narrowing the result to double.
   2    Copyright (C) 2018-2021 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 f32xsubf64x __hide_f32xsubf64x
  20 #define f64subf64x __hide_f64subf64x
  21 #include <math.h>
  22 #undef f32xsubf64x
  23 #undef f64subf64x
  24
  25 #include <math-narrow.h>
  26
  27 double
  28 __dsubl (long double x, long double y)
  29 {
  30   NARROW_SUB_ROUND_TO_ODD (x, y, double, union ieee854_long_double, l,
  31                            mantissa1);
  32 }
  33 libm_alias_double_ldouble (sub)