Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 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[] = "$\Id: s_finite.c,v 1.2.6.1 1997/02/23 11:03:17 joerg 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 | #ifdef __STDC__ |
||
| 26 | int __generic_finite(double x) |
||
| 27 | #else |
||
| 28 | int __generic_finite(x) |
||
| 29 | double x; |
||
| 30 | #endif |
||
| 31 | { |
||
| 32 | int32_t hx; |
||
| 33 | GET_HIGH_WORD(hx,x); |
||
| 34 | return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31); |
||
| 35 | } |