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#ifndef CYGONCE_LIBM_SYS_IEEEFP_H
#define CYGONCE_LIBM_SYS_IEEEFP_H
//===========================================================================
//
//      ieeefp.h
//
//      Definitions specific to IEEE-754 floating-point format
//
//===========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos 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 General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//===========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   jlarmour
// Contributors:  jlarmour
// Date:        1998-02-13
// Purpose:     
// Description: Definitions specific to IEEE-754 floating-point format
// Usage:       #include <sys/ieeefp.h>
//
//####DESCRIPTIONEND####
//
//===========================================================================
 
// CONFIGURATION
 
#include <pkgconf/libm.h>   // Configuration header
 
// Include the Math library?
#ifdef CYGPKG_LIBM     
 
// INCLUDES
 
#include <cyg/infra/cyg_type.h>     // Common type definitions and support
                                    // including endian-ness
 
#if (CYG_BYTEORDER == CYG_MSBFIRST) // Big endian
 
// Note: there do not seem to be any current machines which are Big Endian but
// have a mixed up double layout. 
 
typedef union
{
    cyg_int32 asi32[2];
 
    cyg_int64 asi64;
 
    double value;
 
    struct
    {
        unsigned int sign : 1;
        unsigned int exponent: 11;
        unsigned int fraction0:4;
        unsigned int fraction1:16;
        unsigned int fraction2:16;
        unsigned int fraction3:16;
 
    } number;
 
    struct
    {
        unsigned int sign : 1;
        unsigned int exponent: 11;
        unsigned int quiet:1;
        unsigned int function0:3;
        unsigned int function1:16;
        unsigned int function2:16;
        unsigned int function3:16;
    } nan;
 
    struct
    {
        cyg_uint32 msw;
        cyg_uint32 lsw;
    } parts;
 
 
} Cyg_libm_ieee_double_shape_type;
 
 
typedef union
{
    cyg_int32 asi32;
 
    float value;
 
    struct
    {
        unsigned int sign : 1;
        unsigned int exponent: 8;
        unsigned int fraction0: 7;
        unsigned int fraction1: 16;
    } number;
 
    struct
    {
        unsigned int sign:1;
        unsigned int exponent:8;
        unsigned int quiet:1;
        unsigned int function0:6;
        unsigned int function1:16;
    } nan;
 
} Cyg_libm_ieee_float_shape_type;
 
 
#else // Little endian
 
typedef union
{
    cyg_int32 asi32[2];
 
    cyg_int64 asi64;
 
    double value;
 
    struct
    {
#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian
        unsigned int fraction1:16;
        unsigned int fraction0: 4;
        unsigned int exponent :11;
        unsigned int sign     : 1;
        unsigned int fraction3:16;
        unsigned int fraction2:16;
#else
        unsigned int fraction3:16;
        unsigned int fraction2:16;
        unsigned int fraction1:16;
        unsigned int fraction0: 4;
        unsigned int exponent :11;
        unsigned int sign     : 1;
#endif
    } number;
 
    struct
    {
#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian
        unsigned int function1:16;
        unsigned int function0:3;
        unsigned int quiet:1;
        unsigned int exponent: 11;
        unsigned int sign : 1;
        unsigned int function3:16;
        unsigned int function2:16;
#else
        unsigned int function3:16;
        unsigned int function2:16;
        unsigned int function1:16;
        unsigned int function0:3;
        unsigned int quiet:1;
        unsigned int exponent: 11;
        unsigned int sign : 1;
#endif
    } nan;
 
    struct
    {
#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian
        cyg_uint32 msw;
        cyg_uint32 lsw;
#else
        cyg_uint32 lsw;
        cyg_uint32 msw;
#endif
    } parts;
 
} Cyg_libm_ieee_double_shape_type;
 
 
typedef union
{
    cyg_int32 asi32;
 
    float value;
 
    struct
    {
        unsigned int fraction0: 7;
        unsigned int fraction1: 16;
        unsigned int exponent: 8;
        unsigned int sign : 1;
    } number;
 
    struct
    {
        unsigned int function1:16;
        unsigned int function0:6;
        unsigned int quiet:1;
        unsigned int exponent:8;
        unsigned int sign:1;
    } nan;
 
} Cyg_libm_ieee_float_shape_type;
 
#endif // little-endian
 
 
#endif // ifdef CYGPKG_LIBM     
 
#endif // CYGONCE_LIBM_SYS_IEEEFP_H multiple inclusion protection
 
// EOF ieeefp.h

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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [language/] [c/] [libm/] [v2_0/] [include/] [sys/] [ieeefp.h] - Blame information for rev 308

Line No.	Rev	Author	Line
1	27	unneback	`#ifndef CYGONCE_LIBM_SYS_IEEEFP_H`
2			`#define CYGONCE_LIBM_SYS_IEEEFP_H`
3			`//===========================================================================`
4			`//`
5			`// ieeefp.h`
6			`//`
7			`// Definitions specific to IEEE-754 floating-point format`
8			`//`
9			`//===========================================================================`
10			`//####ECOSGPLCOPYRIGHTBEGIN####`
11			`// -------------------------------------------`
12			`// This file is part of eCos, the Embedded Configurable Operating System.`
13			`// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.`
14			`//`
15			`// eCos is free software; you can redistribute it and/or modify it under`
16			`// the terms of the GNU General Public License as published by the Free`
17			`// Software Foundation; either version 2 or (at your option) any later version.`
18			`//`
19			`// eCos is distributed in the hope that it will be useful, but WITHOUT ANY`
20			`// WARRANTY; without even the implied warranty of MERCHANTABILITY or`
21			`// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License`
22			`// for more details.`
23			`//`
24			`// You should have received a copy of the GNU General Public License along`
25			`// with eCos; if not, write to the Free Software Foundation, Inc.,`
26			`// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.`
27			`//`
28			`// As a special exception, if other files instantiate templates or use macros`
29			`// or inline functions from this file, or you compile this file and link it`
30			`// with other works to produce a work based on this file, this file does not`
31			`// by itself cause the resulting work to be covered by the GNU General Public`
32			`// License. However the source code for this file must still be made available`
33			`// in accordance with section (3) of the GNU General Public License.`
34			`//`
35			`// This exception does not invalidate any other reasons why a work based on`
36			`// this file might be covered by the GNU General Public License.`
37			`//`
38			`// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.`
39			`// at http://sources.redhat.com/ecos/ecos-license/`
40			`// -------------------------------------------`
41			`//####ECOSGPLCOPYRIGHTEND####`
42			`//===========================================================================`
43			`//#####DESCRIPTIONBEGIN####`
44			`//`
45			`// Author(s): jlarmour`
46			`// Contributors: jlarmour`
47			`// Date: 1998-02-13`
48			`// Purpose:`
49			`// Description: Definitions specific to IEEE-754 floating-point format`
50			`// Usage: #include <sys/ieeefp.h>`
51			`//`
52			`//####DESCRIPTIONEND####`
53			`//`
54			`//===========================================================================`
55
56			`// CONFIGURATION`
57
58			`#include <pkgconf/libm.h> // Configuration header`
59
60			`// Include the Math library?`
61			`#ifdef CYGPKG_LIBM`
62
63			`// INCLUDES`
64
65			`#include <cyg/infra/cyg_type.h> // Common type definitions and support`
66			`// including endian-ness`
67
68			`#if (CYG_BYTEORDER == CYG_MSBFIRST) // Big endian`
69
70			`// Note: there do not seem to be any current machines which are Big Endian but`
71			`// have a mixed up double layout.`
72
73			`typedef union`
74			`{`
75			`cyg_int32 asi32[2];`
76
77			`cyg_int64 asi64;`
78
79			`double value;`
80
81			`struct`
82			`{`
83			`unsigned int sign : 1;`
84			`unsigned int exponent: 11;`
85			`unsigned int fraction0:4;`
86			`unsigned int fraction1:16;`
87			`unsigned int fraction2:16;`
88			`unsigned int fraction3:16;`
89
90			`} number;`
91
92			`struct`
93			`{`
94			`unsigned int sign : 1;`
95			`unsigned int exponent: 11;`
96			`unsigned int quiet:1;`
97			`unsigned int function0:3;`
98			`unsigned int function1:16;`
99			`unsigned int function2:16;`
100			`unsigned int function3:16;`
101			`} nan;`
102
103			`struct`
104			`{`
105			`cyg_uint32 msw;`
106			`cyg_uint32 lsw;`
107			`} parts;`
108
109
110			`} Cyg_libm_ieee_double_shape_type;`
111
112
113			`typedef union`
114			`{`
115			`cyg_int32 asi32;`
116
117			`float value;`
118
119			`struct`
120			`{`
121			`unsigned int sign : 1;`
122			`unsigned int exponent: 8;`
123			`unsigned int fraction0: 7;`
124			`unsigned int fraction1: 16;`
125			`} number;`
126
127			`struct`
128			`{`
129			`unsigned int sign:1;`
130			`unsigned int exponent:8;`
131			`unsigned int quiet:1;`
132			`unsigned int function0:6;`
133			`unsigned int function1:16;`
134			`} nan;`
135
136			`} Cyg_libm_ieee_float_shape_type;`
137
138
139			`#else // Little endian`
140
141			`typedef union`
142			`{`
143			`cyg_int32 asi32[2];`
144
145			`cyg_int64 asi64;`
146
147			`double value;`
148
149			`struct`
150			`{`
151			`#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian`
152			`unsigned int fraction1:16;`
153			`unsigned int fraction0: 4;`
154			`unsigned int exponent :11;`
155			`unsigned int sign : 1;`
156			`unsigned int fraction3:16;`
157			`unsigned int fraction2:16;`
158			`#else`
159			`unsigned int fraction3:16;`
160			`unsigned int fraction2:16;`
161			`unsigned int fraction1:16;`
162			`unsigned int fraction0: 4;`
163			`unsigned int exponent :11;`
164			`unsigned int sign : 1;`
165			`#endif`
166			`} number;`
167
168			`struct`
169			`{`
170			`#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian`
171			`unsigned int function1:16;`
172			`unsigned int function0:3;`
173			`unsigned int quiet:1;`
174			`unsigned int exponent: 11;`
175			`unsigned int sign : 1;`
176			`unsigned int function3:16;`
177			`unsigned int function2:16;`
178			`#else`
179			`unsigned int function3:16;`
180			`unsigned int function2:16;`
181			`unsigned int function1:16;`
182			`unsigned int function0:3;`
183			`unsigned int quiet:1;`
184			`unsigned int exponent: 11;`
185			`unsigned int sign : 1;`
186			`#endif`
187			`} nan;`
188
189			`struct`
190			`{`
191			`#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian`
192			`cyg_uint32 msw;`
193			`cyg_uint32 lsw;`
194			`#else`
195			`cyg_uint32 lsw;`
196			`cyg_uint32 msw;`
197			`#endif`
198			`} parts;`
199
200			`} Cyg_libm_ieee_double_shape_type;`
201
202
203			`typedef union`
204			`{`
205			`cyg_int32 asi32;`
206
207			`float value;`
208
209			`struct`
210			`{`
211			`unsigned int fraction0: 7;`
212			`unsigned int fraction1: 16;`
213			`unsigned int exponent: 8;`
214			`unsigned int sign : 1;`
215			`} number;`
216
217			`struct`
218			`{`
219			`unsigned int function1:16;`
220			`unsigned int function0:6;`
221			`unsigned int quiet:1;`
222			`unsigned int exponent:8;`
223			`unsigned int sign:1;`
224			`} nan;`
225
226			`} Cyg_libm_ieee_float_shape_type;`
227
228			`#endif // little-endian`
229
230
231			`#endif // ifdef CYGPKG_LIBM`
232
233			`#endif // CYGONCE_LIBM_SYS_IEEEFP_H multiple inclusion protection`
234
235			`// EOF ieeefp.h`