sysdeps/riscv/e_sqrtl.c

   1 /* long double square root in software floating-point emulation.
   2    Copyright (C) 1997-2018 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdlib.h>
  20 #include <soft-fp/soft-fp.h>
  21 #include <soft-fp/quad.h>
  22
  23 long double
  24 __ieee754_sqrtl (const long double a)
  25 {
  26   FP_DECL_EX;
  27   FP_DECL_Q (A); FP_DECL_Q (C);
  28   long double c;
  29
  30   FP_INIT_ROUNDMODE;
  31   FP_UNPACK_Q (A, a);
  32   FP_SQRT_Q (C, A);
  33   FP_PACK_Q (c, C);
  34   FP_HANDLE_EXCEPTIONS;
  35   return c;
  36 }
  37 strong_alias (__ieee754_sqrtl, __sqrtl_finite)