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      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 */
     45