sysdeps/powerpc/fpu/w_sqrtf.c

   1 /* Single-precision floating point square root wrapper.
   2    Copyright (C) 2004 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include "math.h"
  21 #include "math_private.h"
  22 #include <fenv_libc.h>
  23
  24 #include <sysdep.h>
  25 #include <ldsodefs.h>
  26 #include <dl-procinfo.h>
  27
  28 #ifdef __STDC__
  29 float
  30 __sqrtf (float x)               /* wrapper sqrtf */
  31 #else
  32 float
  33 __sqrtf (x)                     /* wrapper sqrtf */
  34      float x;
  35 #endif
  36 {
  37 #ifdef _IEEE_LIBM
  38   return __ieee754_sqrtf (x);
  39 #else
  40   float z;
  41   z = __ieee754_sqrtf (x);
  42
  43   if (_LIB_VERSION == _IEEE_ || (x != x))
  44     return z;
  45
  46   if (x < (float) 0.0)
  47     /* sqrtf(negative) */
  48     return (float) __kernel_standard ((double) x, (double) x, 126);
  49   else
  50     return z;
  51 #endif
  52 }
  53
  54 weak_alias (__sqrtf, sqrtf)