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1 /* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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. */
19 #if !defined _MATH_H && !defined _COMPLEX_H
20 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
24 /* FIXME! This file describes properties of the compiler, not the machine;
25 it should not be part of libc!
27 FIXME! This file does not deal with the -fshort-double option of
30 #if defined __USE_ISOC99 && defined _MATH_H
34 /* In GNU or ANSI mode, gcc leaves `float' expressions as-is. */
35 typedef float float_t
; /* `float' expressions are evaluated as
37 typedef double double_t
; /* `double' expressions are evaluated as
40 /* Signal that types stay as they were declared. */
41 # define FLT_EVAL_METHOD 0
43 /* Define `INFINITY' as value of type `float'. */
44 # define INFINITY HUGE_VALF
48 /* For `gcc -traditional', `float' expressions are evaluated as `double'. */
49 typedef double float_t
; /* `float' expressions are evaluated as
51 typedef double double_t
; /* `double' expressions are evaluated as
54 /* Signal that both types are `double'. */
55 # define FLT_EVAL_METHOD 1
57 /* Define `INFINITY' as value of type `float'. */
58 # define INFINITY HUGE_VALF
63 /* Wild guess at types for float_t and double_t. */
64 typedef double float_t
;
65 typedef double double_t
;
67 /* Strange compiler, we don't know how it works. */
68 # define FLT_EVAL_METHOD -1
70 /* Define `INFINITY' as value of type `float'. */
71 # define INFINITY HUGE_VALF
75 /* The values returned by `ilogb' for 0 and NaN respectively. */
76 # define FP_ILOGB0 0x80000001
77 # define FP_ILOGBNAN 0x7fffffff
79 /* Number of decimal digits for the `double' type. */
80 # define DECIMAL_DIG 15
84 #ifndef __NO_LONG_DOUBLE_MATH
85 /* Signal that we do not really have a `long double'. The disables the
86 declaration of all the `long double' function variants. */
87 # define __NO_LONG_DOUBLE_MATH 1
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