1 /* @(#)w_hypot.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 /*
14 * wrapper hypot(x,y)
15 */
16
17 #include <math.h>
18 #include <math_private.h>
19 #include <math-svid-compat.h>
20 #include <libm-alias-double.h>
21
22
23 #if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_35)
24 double
__hypot_compat(double x,double y)25 __hypot_compat (double x, double y)
26 {
27 double z = __ieee754_hypot(x,y);
28 if(__builtin_expect(!isfinite(z), 0)
29 && isfinite(x) && isfinite(y) && _LIB_VERSION != _IEEE_)
30 return __kernel_standard(x, y, 4); /* hypot overflow */
31
32 return z;
33 }
34 compat_symbol (libm, __hypot_compat, hypot, GLIBC_2_0);
35 # ifdef NO_LONG_DOUBLE
36 weak_alias (__hypot_compat, hypotl)
37 # endif
38 # ifdef LONG_DOUBLE_COMPAT
39 LONG_DOUBLE_COMPAT_CHOOSE_libm_hypotl (
40 compat_symbol (libm, __hypot_compat, hypotl, FIRST_VERSION_libm_hypotl), );
41 # endif
42 #endif
43