| /* @(#)s_finite.c 5.1 93/09/24 */ |
| /* |
| * ==================================================== |
| * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
| * |
| * Developed at SunPro, a Sun Microsystems, Inc. business. |
| * Permission to use, copy, modify, and distribute this |
| * software is freely granted, provided that this notice |
| * is preserved. |
| * ==================================================== |
| */ |
| |
| #if defined(LIBM_SCCS) && !defined(lint) |
| static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc Exp $"; |
| #endif |
| |
| /* |
| * finite(x) returns 1 is x is finite, else 0; |
| * no branching! |
| */ |
| |
| #include <math.h> |
| #include <math_private.h> |
| |
| #undef __finite |
| |
| #ifndef FINITE |
| # define FINITE __finite |
| #endif |
| |
| int FINITE(double x) |
| { |
| int32_t hx; |
| GET_HIGH_WORD (hx, x); |
| return (int) ((u_int32_t) ((hx & 0x7fffffff) - 0x7ff00000) >> 31); |
| } |
| hidden_def (__finite) |
| weak_alias (__finite, finite) |
| #ifdef NO_LONG_DOUBLE |
| strong_alias (__finite, __finitel) |
| weak_alias (__finite, finitel) |
| #endif |
