/* Square root of long double (ldbl-128) value, narrowing the result to
   double, using soft-fp.
   Copyright (C) 2021 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
   <https://www.gnu.org/licenses/>.  */

#define f32xsqrtf64x __hide_f32xsqrtf64x
#define f32xsqrtf128 __hide_f32xsqrtf128
#define f64sqrtf64x __hide_f64sqrtf64x
#define f64sqrtf128 __hide_f64sqrtf128
#include <math.h>
#undef f32xsqrtf64x
#undef f32xsqrtf128
#undef f64sqrtf64x
#undef f64sqrtf128

#include <math-narrow.h>
#include <libc-diag.h>

/* Some components of the result's significand and exponent are not
   set in cases where they are not used in packing, but the compiler
   does not see that they are set in all cases where they are used,
   resulting in warnings that they may be used uninitialized.  */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (7, "-Wmaybe-uninitialized");
#include <soft-fp.h>
#include <double.h>
#include <quad.h>

double
__dsqrtl (_Float128 x)
{
  FP_DECL_EX;
  FP_DECL_Q (X);
  FP_DECL_Q (R);
  FP_DECL_D (RN);
  double ret;

  FP_INIT_ROUNDMODE;
  FP_UNPACK_Q (X, x);
  FP_SQRT_Q (R, X);
#if _FP_W_TYPE_SIZE < 64
  FP_TRUNC_COOKED (D, Q, 2, 4, RN, R);
#else
  FP_TRUNC_COOKED (D, Q, 1, 2, RN, R);
#endif
  FP_PACK_D (ret, RN);
  FP_HANDLE_EXCEPTIONS;
  CHECK_NARROW_SQRT (ret, x);
  return ret;
}
DIAG_POP_NEEDS_COMMENT;

libm_alias_double_ldouble (sqrt)