Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4973 | right-hear | 1 | /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
| 2 | /* s_isnanf.c -- float version of s_isnan.c. |
||
| 3 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. |
||
| 4 | */ |
||
| 5 | |||
| 6 | /* |
||
| 7 | * ==================================================== |
||
| 8 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
||
| 9 | * |
||
| 10 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
||
| 11 | * Permission to use, copy, modify, and distribute this |
||
| 12 | * software is freely granted, provided that this notice |
||
| 13 | * is preserved. |
||
| 14 | * ==================================================== |
||
| 15 | */ |
||
| 16 | |||
| 17 | #if defined(LIBM_SCCS) && !defined(lint) |
||
| 18 | static char rcsid[] = "$Id: s_isnanf.c,v 1.2 1994/08/18 23:06:56 jtc Exp $"; |
||
| 19 | #endif |
||
| 20 | |||
| 21 | /* |
||
| 22 | * isnanf(x) returns 1 is x is nan, else 0; |
||
| 23 | * no branching! |
||
| 24 | */ |
||
| 25 | |||
| 26 | #include "math.h" |
||
| 27 | #include "math_private.h" |
||
| 28 | |||
| 29 | #ifdef __STDC__ |
||
| 30 | int isnanf(float x) |
||
| 31 | #else |
||
| 32 | int isnanf(x) |
||
| 33 | float x; |
||
| 34 | #endif |
||
| 35 | { |
||
| 36 | int32_t ix; |
||
| 37 | GET_FLOAT_WORD(ix,x); |
||
| 38 | ix &= 0x7fffffff; |
||
| 39 | ix = 0x7f800000 - ix; |
||
| 40 | return (int)(((u_int32_t)(ix))>>31); |
||
| 41 | } |