OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [ginclude/] [float.h] - Blame information for rev 867

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 38 julius
/* Copyright (C) 2002 Free Software Foundation, Inc.
2
 
3
This file is part of GCC.
4
 
5
GCC is free software; you can redistribute it and/or modify
6
it under the terms of the GNU General Public License as published by
7
the Free Software Foundation; either version 2, or (at your option)
8
any later version.
9
 
10
GCC is distributed in the hope that it will be useful,
11
but WITHOUT ANY WARRANTY; without even the implied warranty of
12
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
GNU General Public License for more details.
14
 
15
You should have received a copy of the GNU General Public License
16
along with GCC; see the file COPYING.  If not, write to
17
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
18
Boston, MA 02110-1301, USA.  */
19
 
20
/* As a special exception, if you include this header file into source
21
   files compiled by GCC, this header file does not by itself cause
22
   the resulting executable to be covered by the GNU General Public
23
   License.  This exception does not however invalidate any other
24
   reasons why the executable file might be covered by the GNU General
25
   Public License.  */
26
 
27
/*
28
 * ISO C Standard:  5.2.4.2.2  Characteristics of floating types <float.h>
29
 */
30
 
31
#ifndef _FLOAT_H___
32
#define _FLOAT_H___
33
 
34
/* Radix of exponent representation, b. */
35
#undef FLT_RADIX
36
#define FLT_RADIX       __FLT_RADIX__
37
 
38
/* Number of base-FLT_RADIX digits in the significand, p.  */
39
#undef FLT_MANT_DIG
40
#undef DBL_MANT_DIG
41
#undef LDBL_MANT_DIG
42
#define FLT_MANT_DIG    __FLT_MANT_DIG__
43
#define DBL_MANT_DIG    __DBL_MANT_DIG__
44
#define LDBL_MANT_DIG   __LDBL_MANT_DIG__
45
 
46
/* Number of decimal digits, q, such that any floating-point number with q
47
   decimal digits can be rounded into a floating-point number with p radix b
48
   digits and back again without change to the q decimal digits,
49
 
50
        p * log10(b)                    if b is a power of 10
51
        floor((p - 1) * log10(b))       otherwise
52
*/
53
#undef FLT_DIG
54
#undef DBL_DIG
55
#undef LDBL_DIG
56
#define FLT_DIG         __FLT_DIG__
57
#define DBL_DIG         __DBL_DIG__
58
#define LDBL_DIG        __LDBL_DIG__
59
 
60
/* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */
61
#undef FLT_MIN_EXP
62
#undef DBL_MIN_EXP
63
#undef LDBL_MIN_EXP
64
#define FLT_MIN_EXP     __FLT_MIN_EXP__
65
#define DBL_MIN_EXP     __DBL_MIN_EXP__
66
#define LDBL_MIN_EXP    __LDBL_MIN_EXP__
67
 
68
/* Minimum negative integer such that 10 raised to that power is in the
69
   range of normalized floating-point numbers,
70
 
71
        ceil(log10(b) * (emin - 1))
72
*/
73
#undef FLT_MIN_10_EXP
74
#undef DBL_MIN_10_EXP
75
#undef LDBL_MIN_10_EXP
76
#define FLT_MIN_10_EXP  __FLT_MIN_10_EXP__
77
#define DBL_MIN_10_EXP  __DBL_MIN_10_EXP__
78
#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
79
 
80
/* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax.  */
81
#undef FLT_MAX_EXP
82
#undef DBL_MAX_EXP
83
#undef LDBL_MAX_EXP
84
#define FLT_MAX_EXP     __FLT_MAX_EXP__
85
#define DBL_MAX_EXP     __DBL_MAX_EXP__
86
#define LDBL_MAX_EXP    __LDBL_MAX_EXP__
87
 
88
/* Maximum integer such that 10 raised to that power is in the range of
89
   representable finite floating-point numbers,
90
 
91
        floor(log10((1 - b**-p) * b**emax))
92
*/
93
#undef FLT_MAX_10_EXP
94
#undef DBL_MAX_10_EXP
95
#undef LDBL_MAX_10_EXP
96
#define FLT_MAX_10_EXP  __FLT_MAX_10_EXP__
97
#define DBL_MAX_10_EXP  __DBL_MAX_10_EXP__
98
#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
99
 
100
/* Maximum representable finite floating-point number,
101
 
102
        (1 - b**-p) * b**emax
103
*/
104
#undef FLT_MAX
105
#undef DBL_MAX
106
#undef LDBL_MAX
107
#define FLT_MAX         __FLT_MAX__
108
#define DBL_MAX         __DBL_MAX__
109
#define LDBL_MAX        __LDBL_MAX__
110
 
111
/* The difference between 1 and the least value greater than 1 that is
112
   representable in the given floating point type, b**1-p.  */
113
#undef FLT_EPSILON
114
#undef DBL_EPSILON
115
#undef LDBL_EPSILON
116
#define FLT_EPSILON     __FLT_EPSILON__
117
#define DBL_EPSILON     __DBL_EPSILON__
118
#define LDBL_EPSILON    __LDBL_EPSILON__
119
 
120
/* Minimum normalized positive floating-point number, b**(emin - 1).  */
121
#undef FLT_MIN
122
#undef DBL_MIN
123
#undef LDBL_MIN
124
#define FLT_MIN         __FLT_MIN__
125
#define DBL_MIN         __DBL_MIN__
126
#define LDBL_MIN        __LDBL_MIN__
127
 
128
/* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown.  */
129
/* ??? This is supposed to change with calls to fesetround in <fenv.h>.  */
130
#undef FLT_ROUNDS
131
#define FLT_ROUNDS 1
132
 
133
#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
134
/* The floating-point expression evaluation method.
135
        -1  indeterminate
136
 
137
            precision of the type
138
         1  evaluate operations and constants of type float and double
139
            to the range and precision of the double type, evaluate
140
            long double operations and constants to the range and
141
            precision of the long double type
142
         2  evaluate all operations and constants to the range and
143
            precision of the long double type
144
 
145
   ??? This ought to change with the setting of the fp control word;
146
   the value provided by the compiler assumes the widest setting.  */
147
#undef FLT_EVAL_METHOD
148
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
149
 
150
/* Number of decimal digits, n, such that any floating-point number in the
151
   widest supported floating type with pmax radix b digits can be rounded
152
   to a floating-point number with n decimal digits and back again without
153
   change to the value,
154
 
155
        pmax * log10(b)                 if b is a power of 10
156
        ceil(1 + pmax * log10(b))       otherwise
157
*/
158
#undef DECIMAL_DIG
159
#define DECIMAL_DIG     __DECIMAL_DIG__
160
 
161
#endif /* C99 */
162
#endif /* _FLOAT_H___ */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.