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/* Copyright (C) 1992, 1995, 1996, 1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
 
   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.
 
   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */
 
#ifndef _IEEE754_H
 
#define _IEEE754_H 1
#include <features.h>
 
#include <endian.h>
 
__BEGIN_DECLS
 
union ieee754_float
  {
    float f;
 
    /* This is the IEEE 754 single-precision format.  */
    struct
      {
#if     __BYTE_ORDER == __BIG_ENDIAN
        unsigned int negative:1;
        unsigned int exponent:8;
        unsigned int mantissa:23;
#endif                          /* Big endian.  */
#if     __BYTE_ORDER == __LITTLE_ENDIAN
        unsigned int mantissa:23;
        unsigned int exponent:8;
        unsigned int negative:1;
#endif                          /* Little endian.  */
      } ieee;
 
    /* This format makes it easier to see if a NaN is a signalling NaN.  */
    struct
      {
#if     __BYTE_ORDER == __BIG_ENDIAN
        unsigned int negative:1;
        unsigned int exponent:8;
        unsigned int quiet_nan:1;
        unsigned int mantissa:22;
#endif                          /* Big endian.  */
#if     __BYTE_ORDER == __LITTLE_ENDIAN
        unsigned int mantissa:22;
        unsigned int quiet_nan:1;
        unsigned int exponent:8;
        unsigned int negative:1;
#endif                          /* Little endian.  */
      } ieee_nan;
  };
 
#define IEEE754_FLOAT_BIAS      0x7f /* Added to exponent.  */
 
 
union ieee754_double
  {
    double d;
 
    /* This is the IEEE 754 double-precision format.  */
    struct
      {
#if     __BYTE_ORDER == __BIG_ENDIAN
        unsigned int negative:1;
        unsigned int exponent:11;
        /* Together these comprise the mantissa.  */
        unsigned int mantissa0:20;
        unsigned int mantissa1:32;
#endif                          /* Big endian.  */
#if     __BYTE_ORDER == __LITTLE_ENDIAN
# if    __FLOAT_WORD_ORDER == BIG_ENDIAN
        unsigned int mantissa0:20;
        unsigned int exponent:11;
        unsigned int negative:1;
        unsigned int mantissa1:32;
# else
        /* Together these comprise the mantissa.  */
        unsigned int mantissa1:32;
        unsigned int mantissa0:20;
        unsigned int exponent:11;
        unsigned int negative:1;
# endif
#endif                          /* Little endian.  */
      } ieee;
 
    /* This format makes it easier to see if a NaN is a signalling NaN.  */
    struct
      {
#if     __BYTE_ORDER == __BIG_ENDIAN
        unsigned int negative:1;
        unsigned int exponent:11;
        unsigned int quiet_nan:1;
        /* Together these comprise the mantissa.  */
        unsigned int mantissa0:19;
        unsigned int mantissa1:32;
#else
# if    __FLOAT_WORD_ORDER == BIG_ENDIAN
        unsigned int mantissa0:19;
        unsigned int quiet_nan:1;
        unsigned int exponent:11;
        unsigned int negative:1;
        unsigned int mantissa1:32;
# else
        /* Together these comprise the mantissa.  */
        unsigned int mantissa1:32;
        unsigned int mantissa0:19;
        unsigned int quiet_nan:1;
        unsigned int exponent:11;
        unsigned int negative:1;
# endif
#endif
      } ieee_nan;
  };
 
#define IEEE754_DOUBLE_BIAS     0x3ff /* Added to exponent.  */
 
 
union ieee854_long_double
  {
    long double d;
 
    /* This is the IEEE 854 double-extended-precision format.  */
    struct
      {
#if     __BYTE_ORDER == __BIG_ENDIAN
        unsigned int negative:1;
        unsigned int exponent:15;
        unsigned int empty:16;
        unsigned int mantissa0:32;
        unsigned int mantissa1:32;
#endif
#if     __BYTE_ORDER == __LITTLE_ENDIAN
# if    __FLOAT_WORD_ORDER == BIG_ENDIAN
        unsigned int exponent:15;
        unsigned int negative:1;
        unsigned int empty:16;
        unsigned int mantissa0:32;
        unsigned int mantissa1:32;
# else
        unsigned int mantissa1:32;
        unsigned int mantissa0:32;
        unsigned int exponent:15;
        unsigned int negative:1;
        unsigned int empty:16;
# endif
#endif
      } ieee;
 
    /* This is for NaNs in the IEEE 854 double-extended-precision format.  */
    struct
      {
#if     __BYTE_ORDER == __BIG_ENDIAN
        unsigned int negative:1;
        unsigned int exponent:15;
        unsigned int empty:16;
        unsigned int one:1;
        unsigned int quiet_nan:1;
        unsigned int mantissa0:30;
        unsigned int mantissa1:32;
#endif
#if     __BYTE_ORDER == __LITTLE_ENDIAN
# if    __FLOAT_WORD_ORDER == BIG_ENDIAN
        unsigned int exponent:15;
        unsigned int negative:1;
        unsigned int empty:16;
        unsigned int mantissa0:30;
        unsigned int quiet_nan:1;
        unsigned int one:1;
        unsigned int mantissa1:32;
# else
        unsigned int mantissa1:32;
        unsigned int mantissa0:30;
        unsigned int quiet_nan:1;
        unsigned int one:1;
        unsigned int exponent:15;
        unsigned int negative:1;
        unsigned int empty:16;
# endif
#endif
      } ieee_nan;
  };
 
#define IEEE854_LONG_DOUBLE_BIAS 0x3fff
 
__END_DECLS
 
#endif /* ieee754.h */

Line No.	Rev	Author	Line
1	2	drasko	`/* Copyright (C) 1992, 1995, 1996, 1999 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			`#ifndef _IEEE754_H`
20
21			`#define _IEEE754_H 1`
22			`#include <features.h>`
23
24			`#include <endian.h>`
25
26			`__BEGIN_DECLS`
27
28			`union ieee754_float`
29			`{`
30			`float f;`
31
32			`/* This is the IEEE 754 single-precision format. */`
33			`struct`
34			`{`
35			`#if __BYTE_ORDER == __BIG_ENDIAN`
36			`unsigned int negative:1;`
37			`unsigned int exponent:8;`
38			`unsigned int mantissa:23;`
39			`#endif /* Big endian. */`
40			`#if __BYTE_ORDER == __LITTLE_ENDIAN`
41			`unsigned int mantissa:23;`
42			`unsigned int exponent:8;`
43			`unsigned int negative:1;`
44			`#endif /* Little endian. */`
45			`} ieee;`
46
47			`/* This format makes it easier to see if a NaN is a signalling NaN. */`
48			`struct`
49			`{`
50			`#if __BYTE_ORDER == __BIG_ENDIAN`
51			`unsigned int negative:1;`
52			`unsigned int exponent:8;`
53			`unsigned int quiet_nan:1;`
54			`unsigned int mantissa:22;`
55			`#endif /* Big endian. */`
56			`#if __BYTE_ORDER == __LITTLE_ENDIAN`
57			`unsigned int mantissa:22;`
58			`unsigned int quiet_nan:1;`
59			`unsigned int exponent:8;`
60			`unsigned int negative:1;`
61			`#endif /* Little endian. */`
62			`} ieee_nan;`
63			`};`
64
65			`#define IEEE754_FLOAT_BIAS 0x7f /* Added to exponent. */`
66
67
68			`union ieee754_double`
69			`{`
70			`double d;`
71
72			`/* This is the IEEE 754 double-precision format. */`
73			`struct`
74			`{`
75			`#if __BYTE_ORDER == __BIG_ENDIAN`
76			`unsigned int negative:1;`
77			`unsigned int exponent:11;`
78			`/* Together these comprise the mantissa. */`
79			`unsigned int mantissa0:20;`
80			`unsigned int mantissa1:32;`
81			`#endif /* Big endian. */`
82			`#if __BYTE_ORDER == __LITTLE_ENDIAN`
83			`# if __FLOAT_WORD_ORDER == BIG_ENDIAN`
84			`unsigned int mantissa0:20;`
85			`unsigned int exponent:11;`
86			`unsigned int negative:1;`
87			`unsigned int mantissa1:32;`
88			`# else`
89			`/* Together these comprise the mantissa. */`
90			`unsigned int mantissa1:32;`
91			`unsigned int mantissa0:20;`
92			`unsigned int exponent:11;`
93			`unsigned int negative:1;`
94			`# endif`
95			`#endif /* Little endian. */`
96			`} ieee;`
97
98			`/* This format makes it easier to see if a NaN is a signalling NaN. */`
99			`struct`
100			`{`
101			`#if __BYTE_ORDER == __BIG_ENDIAN`
102			`unsigned int negative:1;`
103			`unsigned int exponent:11;`
104			`unsigned int quiet_nan:1;`
105			`/* Together these comprise the mantissa. */`
106			`unsigned int mantissa0:19;`
107			`unsigned int mantissa1:32;`
108			`#else`
109			`# if __FLOAT_WORD_ORDER == BIG_ENDIAN`
110			`unsigned int mantissa0:19;`
111			`unsigned int quiet_nan:1;`
112			`unsigned int exponent:11;`
113			`unsigned int negative:1;`
114			`unsigned int mantissa1:32;`
115			`# else`
116			`/* Together these comprise the mantissa. */`
117			`unsigned int mantissa1:32;`
118			`unsigned int mantissa0:19;`
119			`unsigned int quiet_nan:1;`
120			`unsigned int exponent:11;`
121			`unsigned int negative:1;`
122			`# endif`
123			`#endif`
124			`} ieee_nan;`
125			`};`
126
127			`#define IEEE754_DOUBLE_BIAS 0x3ff /* Added to exponent. */`
128
129
130			`union ieee854_long_double`
131			`{`
132			`long double d;`
133
134			`/* This is the IEEE 854 double-extended-precision format. */`
135			`struct`
136			`{`
137			`#if __BYTE_ORDER == __BIG_ENDIAN`
138			`unsigned int negative:1;`
139			`unsigned int exponent:15;`
140			`unsigned int empty:16;`
141			`unsigned int mantissa0:32;`
142			`unsigned int mantissa1:32;`
143			`#endif`
144			`#if __BYTE_ORDER == __LITTLE_ENDIAN`
145			`# if __FLOAT_WORD_ORDER == BIG_ENDIAN`
146			`unsigned int exponent:15;`
147			`unsigned int negative:1;`
148			`unsigned int empty:16;`
149			`unsigned int mantissa0:32;`
150			`unsigned int mantissa1:32;`
151			`# else`
152			`unsigned int mantissa1:32;`
153			`unsigned int mantissa0:32;`
154			`unsigned int exponent:15;`
155			`unsigned int negative:1;`
156			`unsigned int empty:16;`
157			`# endif`
158			`#endif`
159			`} ieee;`
160
161			`/* This is for NaNs in the IEEE 854 double-extended-precision format. */`
162			`struct`
163			`{`
164			`#if __BYTE_ORDER == __BIG_ENDIAN`
165			`unsigned int negative:1;`
166			`unsigned int exponent:15;`
167			`unsigned int empty:16;`
168			`unsigned int one:1;`
169			`unsigned int quiet_nan:1;`
170			`unsigned int mantissa0:30;`
171			`unsigned int mantissa1:32;`
172			`#endif`
173			`#if __BYTE_ORDER == __LITTLE_ENDIAN`
174			`# if __FLOAT_WORD_ORDER == BIG_ENDIAN`
175			`unsigned int exponent:15;`
176			`unsigned int negative:1;`
177			`unsigned int empty:16;`
178			`unsigned int mantissa0:30;`
179			`unsigned int quiet_nan:1;`
180			`unsigned int one:1;`
181			`unsigned int mantissa1:32;`
182			`# else`
183			`unsigned int mantissa1:32;`
184			`unsigned int mantissa0:30;`
185			`unsigned int quiet_nan:1;`
186			`unsigned int one:1;`
187			`unsigned int exponent:15;`
188			`unsigned int negative:1;`
189			`unsigned int empty:16;`
190			`# endif`
191			`#endif`
192			`} ieee_nan;`
193			`};`
194
195			`#define IEEE854_LONG_DOUBLE_BIAS 0x3fff`
196
197			`__END_DECLS`
198
199			`#endif /* ieee754.h */`

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[/] [c0or1k/] [trunk/] [conts/] [posix/] [libposix/] [include/] [posix/] [ieee754.h] - Blame information for rev 2