1 /* Copyright (C) 2001, 2004 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19 #if !defined _MATH_H && !defined _COMPLEX_H 20 # error "Never use <bits/mathdef.h> directly; include <math.h> instead" 21 #endif 22 23 #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF 24 # define _MATH_H_MATHDEF 1 25 26 # include <bits/wordsize.h> 27 28 # if __WORDSIZE == 64 || (defined __FLT_EVAL_METHOD__ && __FLT_EVAL_METHOD__ == 0) 29 /* The x86-64 architecture computes values with the precission of the 30 used type. Similarly for -m32 -mfpmath=sse. */ 31 typedef float float_t; /* `float' expressions are evaluated as `float'. */ 32 typedef double double_t; /* `double' expressions are evaluated 33 as `double'. */ 34 # else 35 /* The ix87 FPUs evaluate all values in the 80 bit floating-point format 36 which is also available for the user as `long double'. Therefore we 37 define: */ 38 typedef long double float_t; /* `float' expressions are evaluated as 39 `long double'. */ 40 typedef long double double_t; /* `double' expressions are evaluated as 41 `long double'. */ 42 # endif 43 44 /* The values returned by `ilogb' for 0 and NaN respectively. */ 45 # define FP_ILOGB0 (-2147483647 - 1) 46 # define FP_ILOGBNAN (-2147483647 - 1) 47 48 #endif /* ISO C99 */ 49
