1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2008 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 /* 23 * used to test if -last requires -lm 24 * 25 * arch -last -lm 26 * ---- ----- --- 27 * linux.sparc sfdlen,sfputd frexp,ldexp 28 */ 29 30 #if N >= 8 31 #define _ISOC99_SOURCE 1 32 #endif 33 34 #include <math.h> 35 36 int 37 main() 38 { 39 #if N & 1 40 long double value = 0; 41 #else 42 double value = 0; 43 #endif 44 #if N < 5 45 int exp = 0; 46 #endif 47 48 #if N == 1 49 return ldexpl(value, exp) != 0; 50 #endif 51 #if N == 2 52 return ldexp(value, exp) != 0; 53 #endif 54 #if N == 3 55 return frexpl(value, &exp) != 0; 56 #endif 57 #if N == 4 58 return frexp(value, &exp) != 0; 59 #endif 60 #if N == 5 61 return isnan(value); 62 #endif 63 #if N == 6 64 return isnan(value); 65 #endif 66 #if N == 7 67 return copysign(1.0, value) < 0; 68 #endif 69 #if N == 8 70 return signbit(value); 71 #endif 72 } 73