sysdeps/powerpc/fpu/w_sqrtf.c

   1 /* Single-precision floating point square root wrapper.
   2    Copyright (C) 2004, 2012 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 "math.h"
  20 #include "math_private.h"
  21 #include <fenv_libc.h>
  22
  23 #include <sysdep.h>
  24 #include <ldsodefs.h>
  25
  26 float
  27 __sqrtf (float x)               /* wrapper sqrtf */
  28 {
  29 #ifdef _IEEE_LIBM
  30   return __ieee754_sqrtf (x);
  31 #else
  32   float z;
  33   z = __ieee754_sqrtf (x);
  34
  35   if (_LIB_VERSION == _IEEE_ || (x != x))
  36     return z;
  37
  38   if (x < (float) 0.0)
  39     /* sqrtf(negative) */
  40     return (float) __kernel_standard ((double) x, (double) x, 126);
  41   else
  42     return z;
  43 #endif
  44 }
  45
  46 weak_alias (__sqrtf, sqrtf)