math/w_sqrt_compat.c

   1 /* Copyright (C) 2011-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #define NO_MATH_REDIRECT
  19 #define dsqrtl __hide_dsqrtl
  20 #define f32xsqrtf64 __hide_f32xsqrtf64
  21 #include <math.h>
  22 #undef dsqrtl
  23 #undef f32xsqrtf64
  24 #include <math_private.h>
  25 #include <math-svid-compat.h>
  26 #include <math-narrow-alias.h>
  27 #include <libm-alias-double.h>
  28
  29
  30 #if LIBM_SVID_COMPAT
  31 /* wrapper sqrt */
  32 double
  33 __sqrt (double x)
  34 {
  35   if (__builtin_expect (isless (x, 0.0), 0) && _LIB_VERSION != _IEEE_)
  36     return __kernel_standard (x, x, 26); /* sqrt(negative) */
  37
  38   return __ieee754_sqrt (x);
  39 }
  40 libm_alias_double (__sqrt, sqrt)
  41 libm_alias_double_narrow (__sqrt, sqrt)
  42 #endif