1 /* Copyright (C) 2001-2012 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, see 16 <http://www.gnu.org/licenses/>. */ 17 18 #if !defined _MATH_H && !defined _COMPLEX_H 19 # error "Never use <bits/mathdef.h> directly; include <math.h> instead" 20 #endif 21 22 #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF 23 # define _MATH_H_MATHDEF 1 24 25 # if defined __x86_64__ || (defined __FLT_EVAL_METHOD__ && __FLT_EVAL_METHOD__ == 0) 26 /* The x86-64 architecture computes values with the precission of the 27 used type. Similarly for -m32 -mfpmath=sse. */ 28 typedef float float_t; /* `float' expressions are evaluated as `float'. */ 29 typedef double double_t; /* `double' expressions are evaluated 30 as `double'. */ 31 # else 32 /* The ix87 FPUs evaluate all values in the 80 bit floating-point format 33 which is also available for the user as `long double'. Therefore we 34 define: */ 35 typedef long double float_t; /* `float' expressions are evaluated as 36 `long double'. */ 37 typedef long double double_t; /* `double' expressions are evaluated as 38 `long double'. */ 39 # endif 40 41 /* The values returned by `ilogb' for 0 and NaN respectively. */ 42 # define FP_ILOGB0 (-2147483647 - 1) 43 # define FP_ILOGBNAN (-2147483647 - 1) 44 45 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l} 46 builtins are supported. */ 47 # if __FP_FAST_FMA 48 # define FP_FAST_FMA 1 49 # endif 50 51 # if __FP_FAST_FMAF 52 # define FP_FAST_FMAF 1 53 # endif 54 55 # if __FP_FAST_FMAL 56 # define FP_FAST_FMAL 1 57 # endif 58 59 #endif /* ISO C99 */ 60