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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 Free Software Foundation, 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.,    
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 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 v2.                                               
//
// This exception does not invalidate any other reasons why a work based    
// on this file might be covered by the GNU General Public 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-3.0/] [packages/] [language/] [c/] [libm/] [current/] [include/] [sys/] [ieeefp.h] - Blame information for rev 786

Line No.	Rev	Author	Line
1	786	skrzyp	`#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 Free Software Foundation, 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`
18			`// version.`
19			`//`
20			`// eCos is distributed in the hope that it will be useful, but WITHOUT`
21			`// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or`
22			`// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License`
23			`// for more details.`
24			`//`
25			`// You should have received a copy of the GNU General Public License`
26			`// along with eCos; if not, write to the Free Software Foundation, Inc.,`
27			`// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.`
28			`//`
29			`// As a special exception, if other files instantiate templates or use`
30			`// macros or inline functions from this file, or you compile this file`
31			`// and link it with other works to produce a work based on this file,`
32			`// this file does not by itself cause the resulting work to be covered by`
33			`// the GNU General Public License. However the source code for this file`
34			`// must still be made available in accordance with section (3) of the GNU`
35			`// General Public License v2.`
36			`//`
37			`// This exception does not invalidate any other reasons why a work based`
38			`// on this file might be covered by the GNU General Public License.`
39			`// -------------------------------------------`
40			`// ####ECOSGPLCOPYRIGHTEND####`
41			`//===========================================================================`
42			`//#####DESCRIPTIONBEGIN####`
43			`//`
44			`// Author(s): jlarmour`
45			`// Contributors: jlarmour`
46			`// Date: 1998-02-13`
47			`// Purpose:`
48			`// Description: Definitions specific to IEEE-754 floating-point format`
49			`// Usage: #include <sys/ieeefp.h>`
50			`//`
51			`//####DESCRIPTIONEND####`
52			`//`
53			`//===========================================================================`
54
55			`// CONFIGURATION`
56
57			`#include <pkgconf/libm.h> // Configuration header`
58
59			`// Include the Math library?`
60			`#ifdef CYGPKG_LIBM`
61
62			`// INCLUDES`
63
64			`#include <cyg/infra/cyg_type.h> // Common type definitions and support`
65			`// including endian-ness`
66
67			`#if (CYG_BYTEORDER == CYG_MSBFIRST) // Big endian`
68
69			`// Note: there do not seem to be any current machines which are Big Endian but`
70			`// have a mixed up double layout.`
71
72			`typedef union`
73			`{`
74			`cyg_int32 asi32[2];`
75
76			`cyg_int64 asi64;`
77
78			`double value;`
79
80			`struct`
81			`{`
82			`unsigned int sign : 1;`
83			`unsigned int exponent: 11;`
84			`unsigned int fraction0:4;`
85			`unsigned int fraction1:16;`
86			`unsigned int fraction2:16;`
87			`unsigned int fraction3:16;`
88
89			`} number;`
90
91			`struct`
92			`{`
93			`unsigned int sign : 1;`
94			`unsigned int exponent: 11;`
95			`unsigned int quiet:1;`
96			`unsigned int function0:3;`
97			`unsigned int function1:16;`
98			`unsigned int function2:16;`
99			`unsigned int function3:16;`
100			`} nan;`
101
102			`struct`
103			`{`
104			`cyg_uint32 msw;`
105			`cyg_uint32 lsw;`
106			`} parts;`
107
108
109			`} Cyg_libm_ieee_double_shape_type;`
110
111
112			`typedef union`
113			`{`
114			`cyg_int32 asi32;`
115
116			`float value;`
117
118			`struct`
119			`{`
120			`unsigned int sign : 1;`
121			`unsigned int exponent: 8;`
122			`unsigned int fraction0: 7;`
123			`unsigned int fraction1: 16;`
124			`} number;`
125
126			`struct`
127			`{`
128			`unsigned int sign:1;`
129			`unsigned int exponent:8;`
130			`unsigned int quiet:1;`
131			`unsigned int function0:6;`
132			`unsigned int function1:16;`
133			`} nan;`
134
135			`} Cyg_libm_ieee_float_shape_type;`
136
137
138			`#else // Little endian`
139
140			`typedef union`
141			`{`
142			`cyg_int32 asi32[2];`
143
144			`cyg_int64 asi64;`
145
146			`double value;`
147
148			`struct`
149			`{`
150			`#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian`
151			`unsigned int fraction1:16;`
152			`unsigned int fraction0: 4;`
153			`unsigned int exponent :11;`
154			`unsigned int sign : 1;`
155			`unsigned int fraction3:16;`
156			`unsigned int fraction2:16;`
157			`#else`
158			`unsigned int fraction3:16;`
159			`unsigned int fraction2:16;`
160			`unsigned int fraction1:16;`
161			`unsigned int fraction0: 4;`
162			`unsigned int exponent :11;`
163			`unsigned int sign : 1;`
164			`#endif`
165			`} number;`
166
167			`struct`
168			`{`
169			`#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian`
170			`unsigned int function1:16;`
171			`unsigned int function0:3;`
172			`unsigned int quiet:1;`
173			`unsigned int exponent: 11;`
174			`unsigned int sign : 1;`
175			`unsigned int function3:16;`
176			`unsigned int function2:16;`
177			`#else`
178			`unsigned int function3:16;`
179			`unsigned int function2:16;`
180			`unsigned int function1:16;`
181			`unsigned int function0:3;`
182			`unsigned int quiet:1;`
183			`unsigned int exponent: 11;`
184			`unsigned int sign : 1;`
185			`#endif`
186			`} nan;`
187
188			`struct`
189			`{`
190			`#if (CYG_DOUBLE_BYTEORDER == CYG_MSBFIRST) // Big endian`
191			`cyg_uint32 msw;`
192			`cyg_uint32 lsw;`
193			`#else`
194			`cyg_uint32 lsw;`
195			`cyg_uint32 msw;`
196			`#endif`
197			`} parts;`
198
199			`} Cyg_libm_ieee_double_shape_type;`
200
201
202			`typedef union`
203			`{`
204			`cyg_int32 asi32;`
205
206			`float value;`
207
208			`struct`
209			`{`
210			`unsigned int fraction0: 7;`
211			`unsigned int fraction1: 16;`
212			`unsigned int exponent: 8;`
213			`unsigned int sign : 1;`
214			`} number;`
215
216			`struct`
217			`{`
218			`unsigned int function1:16;`
219			`unsigned int function0:6;`
220			`unsigned int quiet:1;`
221			`unsigned int exponent:8;`
222			`unsigned int sign:1;`
223			`} nan;`
224
225			`} Cyg_libm_ieee_float_shape_type;`
226
227			`#endif // little-endian`
228
229
230			`#endif // ifdef CYGPKG_LIBM`
231
232			`#endif // CYGONCE_LIBM_SYS_IEEEFP_H multiple inclusion protection`
233
234			`// EOF ieeefp.h`