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 |
24 | double |
25 | __hypot (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 | libm_alias_double (__hypot, hypot) |
35 | #endif |
36 | |