sysdeps/ieee754/ldbl-128/s_dmull.c

   1 /* Multiply long double (ldbl-128) values, narrowing the result to double.
   2    Copyright (C) 2018-2024 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 f32xmulf64x __hide_f32xmulf64x
  20 #define f32xmulf128 __hide_f32xmulf128
  21 #define f64mulf64x __hide_f64mulf64x
  22 #define f64mulf128 __hide_f64mulf128
  23 #include <math.h>
  24 #undef f32xmulf64x
  25 #undef f32xmulf128
  26 #undef f64mulf64x
  27 #undef f64mulf128
  28
  29 #include <math-narrow.h>
  30
  31 double
  32 __dmull (_Float128 x, _Float128 y)
  33 {
  34   NARROW_MUL_ROUND_TO_ODD (x, y, double, union ieee854_long_double, l,
  35                            mantissa3, false);
  36 }
  37 libm_alias_double_ldouble (mul)