1  /* Square root of _Float128 value, converting the result to _Float64x.
       2     Copyright (C) 2021-2023 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  #include <math.h>
      20  #include <math-narrow.h>
      21  
      22  /* math_ldbl.h defines _Float128 to long double for this directory,
      23     but when they are different, this function must be defined with
      24     _Float128 arguments to avoid defining an alias with an incompatible
      25     type.  */
      26  #undef _Float128
      27  
      28  #if __HAVE_FLOAT64X_LONG_DOUBLE && __HAVE_DISTINCT_FLOAT128
      29  _Float64x
      30  __f64xsqrtf128 (_Float128 x)
      31  {
      32    NARROW_SQRT_ROUND_TO_ODD (x, _Float64x, union ieee854_long_double, l,
      33  			    mantissa3);
      34  }
      35  libm_alias_float64x_float128 (sqrt)
      36  #else
      37  /* Defined as an alias of sqrtl.  */
      38  #endif