| The Android Open Source Project | a27d2ba | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 1 | /* @(#)s_finite.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 | #ifndef lint |
| 14 | static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_finite.c,v 1.8 2003/07/23 04:53:46 peter Exp $"; |
| 15 | #endif |
| 16 | |
| 17 | /* |
| 18 | * finite(x) returns 1 is x is finite, else 0; |
| 19 | * no branching! |
| 20 | */ |
| 21 | |
| 22 | #include "math.h" |
| 23 | #include "math_private.h" |
| 24 | |
| 25 | int finite(double x) |
| 26 | { |
| 27 | int32_t hx; |
| 28 | GET_HIGH_WORD(hx,x); |
| 29 | return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31); |
| 30 | } |