lib/libm/src/w_sqrtl.c

   1 /* @(#)w_sqrt.c 5.1 93/09/24 */
   2 /*
   3  * ====================================================
   4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * Developed at SunPro, a Sun Microsystems, Inc. business.
   7  * Permission to use, copy, modify, and distribute this
   8  * software is freely granted, provided that this notice
   9  * is preserved.
  10  * ====================================================
  11  */
  12
  13 #include <sys/cdefs.h>
  14 __RCSID("$NetBSD: w_sqrtl.c,v 1.2 2013/11/20 11:39:00 joerg Exp $");
  15
  16 /*
  17  * wrapper sqrtl(x)
  18  */
  19
  20 #include "namespace.h"
  21 #include "math.h"
  22 #include "math_private.h"
  23
  24 #ifdef __HAVE_LONG_DOUBLE
  25
  26 __weak_alias(sqrtl, _sqrtl)
  27
  28 long double
  29 sqrtl(long double x)            /* wrapper sqrtl */
  30 {
  31 #ifdef _IEEE_LIBM
  32         return __ieee754_sqrtl(x);
  33 #else
  34         long double z;
  35         z = __ieee754_sqrtl(x);
  36         if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
  37         if(x<0.0) {
  38             return __kernel_standard(x,x,226); /* sqrtl(negative) */
  39         } else
  40             return z;
  41 #endif
  42 }
  43
  44 #endif /* __HAVE_LONG_DOUBLE */