sysdeps/libm-ieee754/w_sqrtl.c

   1 /* w_sqrtl.c -- long double version of w_sqrt.c.
   2  * Conversion to long double by Ulrich Drepper,
   3  * Cygnus Support, drepper@cygnus.com.
   4  */
   5
   6 /*
   7  * ====================================================
   8  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   9  *
  10  * Developed at SunPro, a Sun Microsystems, Inc. business.
  11  * Permission to use, copy, modify, and distribute this
  12  * software is freely granted, provided that this notice
  13  * is preserved.
  14  * ====================================================
  15  */
  16
  17 #if defined(LIBM_SCCS) && !defined(lint)
  18 static char rcsid[] = "$NetBSD: $";
  19 #endif
  20
  21 /*
  22  * wrapper sqrtl(x)
  23  */
  24
  25 #include "math.h"
  26 #include "math_private.h"
  27
  28 #ifdef __STDC__
  29         long double __sqrtl(long double x)      /* wrapper sqrtl */
  30 #else
  31         long double __sqrtl(x)                  /* wrapper sqrtl */
  32         long double x;
  33 #endif
  34 {
  35 #ifdef _IEEE_LIBM
  36         return __ieee754_sqrtl(x);
  37 #else
  38         long double z;
  39         z = __ieee754_sqrtl(x);
  40         if(_LIB_VERSION == _IEEE_ || __isnanl(x)) return z;
  41         if(x<0.0) {
  42             return __kernel_standard(x,x,226); /* sqrt(negative) */
  43         } else
  44             return z;
  45 #endif
  46 }
  47 weak_alias (__sqrtl, sqrtl)