1*2fe8fb19SBen Gras /* w_sqrtf.c -- float version of w_sqrt.c.
2*2fe8fb19SBen Gras * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3*2fe8fb19SBen Gras */
4*2fe8fb19SBen Gras
5*2fe8fb19SBen Gras /*
6*2fe8fb19SBen Gras * ====================================================
7*2fe8fb19SBen Gras * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8*2fe8fb19SBen Gras *
9*2fe8fb19SBen Gras * Developed at SunPro, a Sun Microsystems, Inc. business.
10*2fe8fb19SBen Gras * Permission to use, copy, modify, and distribute this
11*2fe8fb19SBen Gras * software is freely granted, provided that this notice
12*2fe8fb19SBen Gras * is preserved.
13*2fe8fb19SBen Gras * ====================================================
14*2fe8fb19SBen Gras */
15*2fe8fb19SBen Gras
16*2fe8fb19SBen Gras #include <sys/cdefs.h>
17*2fe8fb19SBen Gras #if defined(LIBM_SCCS) && !defined(lint)
18*2fe8fb19SBen Gras __RCSID("$NetBSD: w_sqrtf.c,v 1.6 2002/05/26 22:02:03 wiz Exp $");
19*2fe8fb19SBen Gras #endif
20*2fe8fb19SBen Gras
21*2fe8fb19SBen Gras /*
22*2fe8fb19SBen Gras * wrapper sqrtf(x)
23*2fe8fb19SBen Gras */
24*2fe8fb19SBen Gras
25*2fe8fb19SBen Gras #include "math.h"
26*2fe8fb19SBen Gras #include "math_private.h"
27*2fe8fb19SBen Gras
28*2fe8fb19SBen Gras float
sqrtf(float x)29*2fe8fb19SBen Gras sqrtf(float x) /* wrapper sqrtf */
30*2fe8fb19SBen Gras {
31*2fe8fb19SBen Gras #ifdef _IEEE_LIBM
32*2fe8fb19SBen Gras return __ieee754_sqrtf(x);
33*2fe8fb19SBen Gras #else
34*2fe8fb19SBen Gras float z;
35*2fe8fb19SBen Gras z = __ieee754_sqrtf(x);
36*2fe8fb19SBen Gras if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
37*2fe8fb19SBen Gras if(x<(float)0.0) {
38*2fe8fb19SBen Gras /* sqrtf(negative) */
39*2fe8fb19SBen Gras return (float)__kernel_standard((double)x,(double)x,126);
40*2fe8fb19SBen Gras } else
41*2fe8fb19SBen Gras return z;
42*2fe8fb19SBen Gras #endif
43*2fe8fb19SBen Gras }
44