/* Subtract long double (ldbl-128) values, narrowing the result to

   double, using soft-fp.

   Copyright (C) 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/>.  */

#define f32xsubf64x __hide_f32xsubf64x

#define f32xsubf128 __hide_f32xsubf128

#define f64subf64x __hide_f64subf64x

#define f64subf128 __hide_f64subf128

#include <math.h>

#undef f32xsubf64x

#undef f32xsubf128

#undef f64subf64x

#undef f64subf128

#include <math-narrow.h>

#include <soft-fp.h>

#include <double.h>

#include <quad.h>

double

__dsubl (_Float128 x, _Float128 y)

{

  FP_DECL_EX;

  FP_DECL_Q (X);

  FP_DECL_Q (Y);

  FP_DECL_Q (R);

  FP_DECL_D (RN);

  double ret;

  FP_INIT_ROUNDMODE;

  FP_UNPACK_SEMIRAW_Q (X, x);

  FP_UNPACK_SEMIRAW_Q (Y, y);

  FP_SUB_Q (R, X, Y);

#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q

  FP_TRUNC (D, Q, 2, 4, RN, R);

#else

  FP_TRUNC (D, Q, 1, 2, RN, R);

#endif

  FP_PACK_SEMIRAW_D (ret, RN);

  FP_HANDLE_EXCEPTIONS;

  CHECK_NARROW_SUB (ret, x, y);

  return ret;

}

libm_alias_double_ldouble (sub)