projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 1f205a47 UD |
1 | /* Copyright (C) 1997 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 Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | 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 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 17 | Boston, MA 02111-1307, USA. */ | |
| 18 | ||
| 5107cf1d UD |
19 | #ifndef _MATH_H |
| 20 | #error "Never use <bits/mathdef.h> directly; include <math.h> instead" | |
| 21 | #endif | |
| 22 | ||
| 1f205a47 UD |
23 | |
| 24 | /* FIXME! This file describes properties of the compiler, not the machine; | |
| 25 | it should not be part of libc! | |
| 26 | ||
| 27 | FIXME! This file does not deal with the -fshort-double option of | |
| 28 | gcc! */ | |
| 29 | ||
| 30 | #ifdef __GNUC__ | |
| 31 | #if __STDC__ == 1 | |
| 32 | ||
| 0413b54c | 33 | /* In GNU or ANSI mode, gcc leaves `float' expressions as-is. */ |
| 1f205a47 UD |
34 | typedef float float_t; /* `float' expressions are evaluated as |
| 35 | `float'. */ | |
| 36 | typedef double double_t; /* `double' expressions are evaluated as | |
| 37 | `double'. */ | |
| 38 | ||
| 39 | /* Signal that types stay as they were declared. */ | |
| 40 | #define FLT_EVAL_METHOD 0 | |
| 41 | ||
| 42 | /* Define `INFINITY' as value of type `float_t'. */ | |
| 43 | #define INFINITY HUGE_VALF | |
| 44 | ||
| 45 | #else | |
| 46 | ||
| 47 | /* For `gcc -traditional', `float' expressions are evaluated as `double'. */ | |
| 48 | typedef double float_t; /* `float' expressions are evaluated as | |
| 49 | `double'. */ | |
| 50 | typedef double double_t; /* `double' expressions are evaluated as | |
| 51 | `double'. */ | |
| 52 | ||
| 53 | /* Signal that both types are `double'. */ | |
| 54 | #define FLT_EVAL_METHOD 1 | |
| 55 | ||
| 56 | /* Define `INFINITY' as value of type `float_t'. */ | |
| 57 | #define INFINITY HUGE_VAL | |
| 58 | ||
| 59 | #endif | |
| 60 | #else | |
| 61 | ||
| 62 | /* Wild guess at types for float_t and double_t. */ | |
| 63 | typedef double float_t; | |
| 64 | typedef double double_t; | |
| 65 | ||
| 66 | /* Strange compiler, we don't know how it works. */ | |
| 67 | #define FLT_EVAL_METHOD -1 | |
| 68 | ||
| 69 | /* Define `INFINITY' as value of type `float_t'. */ | |
| 70 | #define INFINITY HUGE_VAL | |
| 71 | ||
| 72 | #endif | |
| 0413b54c UD |
73 | |
| 74 | /* The values returned by `ilogb' for 0 and NaN respectively. */ | |
| 75 | #define FP_ILOGB0 0x80000001 | |
| 76 | #define FP_ILOGBNAN 0x7fffffff |