source: trunk/libs/newlib/src/newlib/libc/machine/spu/sys/fenv.h @ 444

Last change on this file since 444 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 5.4 KB
Line 
1/*
2  (C) Copyright 2006, 2007
3  International Business Machines Corporation,
4  Sony Computer Entertainment, Incorporated,
5  Toshiba Corporation,
6
7  All rights reserved.
8
9  Redistribution and use in source and binary forms, with or without
10  modification, are permitted provided that the following conditions are met:
11
12    * Redistributions of source code must retain the above copyright notice,
13  this list of conditions and the following disclaimer.
14    * Redistributions in binary form must reproduce the above copyright
15  notice, this list of conditions and the following disclaimer in the
16  documentation and/or other materials provided with the distribution.
17    * Neither the names of the copyright holders nor the names of their
18  contributors may be used to endorse or promote products derived from this
19  software without specific prior written permission.
20
21  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31  POSSIBILITY OF SUCH DAMAGE.
32*/
33#ifndef _SYS_FENV_H
34#define _SYS_FENV_H
35
36/*
37 * The exception macros are such that the functions to pack/unpack them
38 * will map a 32 bit fenv_t from/to the 128 bit fpscr.
39 *
40 * Suffixes:
41 * _SNGL: single precision
42 * _DBL:  double precision
43 * _N:    element number, no suffix for element 0.
44 */
45
46#define FE_OVERFLOW_SNGL        0x08000000
47#define FE_UNDERFLOW_SNGL       0x04000000
48#define FE_DIFF_SNGL            0x02000000
49#define FE_DIVBYZERO_SNGL       0x00000040
50
51#define FE_OVERFLOW_SNGL_1      0x00040000
52#define FE_UNDERFLOW_SNGL_1     0x00020000
53#define FE_DIFF_SNGL_1          0x00010000
54#define FE_DIVBYZERO_SNGL_1     0x00000020
55
56#define FE_OVERFLOW_SNGL_2      0x00000200
57#define FE_UNDERFLOW_SNGL_2     0x00000100
58#define FE_DIFF_SNGL_2          0x00000080
59#define FE_DIVBYZERO_SNGL_2     0x00000010
60
61#define FE_OVERFLOW_SNGL_3      0x00000004
62#define FE_UNDERFLOW_SNGL_3     0x00000002
63#define FE_DIFF_SNGL_3          0x00000001
64#define FE_DIVBYZERO_SNGL_3     0x00000008
65
66#define FE_ALL_EXCEPT_SNGL      (FE_OVERFLOW_SNGL | FE_UNDERFLOW_SNGL \
67                                | FE_DIFF_SNGL | FE_DIVBYZERO_SNGL)
68#define FE_ALL_EXCEPT_SNGL_1    (FE_OVERFLOW_SNGL_1 | FE_UNDERFLOW_SNGL_1 \
69                                | FE_DIFF_SNGL_1 | FE_DIVBYZERO_SNGL_1)
70#define FE_ALL_EXCEPT_SNGL_2    (FE_OVERFLOW_SNGL_2 | FE_UNDERFLOW_SNGL_2 \
71                                | FE_DIFF_SNGL_2 | FE_DIVBYZERO_SNGL_2)
72#define FE_ALL_EXCEPT_SNGL_3    (FE_OVERFLOW_SNGL_3 | FE_UNDERFLOW_SNGL_3 \
73                                | FE_DIFF_SNGL_3 | FE_DIVBYZERO_SNGL_3)
74
75#define FE_OVERFLOW_DBL         0x01000000
76#define FE_UNDERFLOW_DBL        0x00800000
77#define FE_INEXACT_DBL          0x00400000
78#define FE_INVALID_DBL          0x00200000
79#define FE_NC_NAN_DBL           0x00100000
80#define FE_NC_DENORM_DBL        0x00080000
81
82#define FE_OVERFLOW_DBL_1       0x00008000
83#define FE_UNDERFLOW_DBL_1      0x00004000
84#define FE_INEXACT_DBL_1        0x00002000
85#define FE_INVALID_DBL_1        0x00001000
86#define FE_NC_NAN_DBL_1         0x00000800
87#define FE_NC_DENORM_DBL_1      0x00000400
88
89#define FE_ALL_EXCEPT_DBL       (FE_OVERFLOW_DBL | FE_UNDERFLOW_DBL | \
90                                FE_INEXACT_DBL | FE_INVALID_DBL | \
91                                FE_NC_NAN_DBL | FE_NC_DENORM_DBL)
92#define FE_ALL_EXCEPT_DBL_1     (FE_OVERFLOW_DBL_1 | FE_UNDERFLOW_DBL_1 | \
93                                FE_INEXACT_DBL_1 | FE_INVALID_DBL_1 | \
94                                FE_NC_NAN_DBL_1 | FE_NC_DENORM_DBL_1)
95
96#define FE_ALL_EXCEPT           (FE_ALL_EXCEPT_SNGL | FE_ALL_EXCEPT_SNGL_1 | \
97                                FE_ALL_EXCEPT_SNGL_2 | FE_ALL_EXCEPT_SNGL_3 | \
98                                FE_ALL_EXCEPT_DBL | FE_ALL_EXCEPT_DBL_1)
99
100/*
101 * Warning: some of these are single and some double precision only,
102 * because of the hardware implementation.
103 */
104#define FE_DIVBYZERO            (FE_DIVBYZERO_SNGL | FE_DIVBYZERO_SNGL_1 | \
105                                FE_DIVBYZERO_SNGL_2 | FE_DIVBYZERO_SNGL_3)
106#define FE_INEXACT              (FE_INEXACT_DBL | FE_INEXACT_DBL_1)
107#define FE_INVALID              (FE_INVALID_DBL | FE_INVALID_DBL_1)
108#define FE_NC_NAN               (FE_NC_NAN_DBL | FE_NC_NAN_DBL_1)
109#define FE_NC_DENORM            (FE_NC_DENORM_DBL | FE_NC_DENORM_DBL_1)
110
111/*
112 * __FE_ROUND_ELE_n values are set so that they can easily be used as a
113 * mask when setting the fpscr. These tell us whether we are setting the
114 * round mode for a specific element (double precision floating point
115 * only, so there are only two elements).
116 */
117#define __FE_ROUND_ELE_0        0xc00
118#define __FE_ROUND_ELE_1        0x300
119
120/*
121 * The following map directly to round values in the fpscr.
122 */
123#define __FE_SPU_TONEAREST      0
124#define __FE_SPU_TOWARDZERO     1
125#define __FE_SPU_UPWARD         2
126#define __FE_SPU_DOWNWARD       3
127
128#define FE_TONEAREST    (__FE_ROUND_ELE_0 | (__FE_SPU_TONEAREST << 2))
129#define FE_TOWARDZERO   (__FE_ROUND_ELE_0 | (__FE_SPU_TOWARDZERO << 2))
130#define FE_UPWARD       (__FE_ROUND_ELE_0 | (__FE_SPU_UPWARD << 2))
131#define FE_DOWNWARD     (__FE_ROUND_ELE_0 | (__FE_SPU_DOWNWARD << 2))
132
133#define FE_TONEAREST_1  (__FE_ROUND_ELE_1 | __FE_SPU_TONEAREST)
134#define FE_TOWARDZERO_1 (__FE_ROUND_ELE_1 | __FE_SPU_TOWARDZERO)
135#define FE_UPWARD_1     (__FE_ROUND_ELE_1 | __FE_SPU_UPWARD)
136#define FE_DOWNWARD_1   (__FE_ROUND_ELE_1 | __FE_SPU_DOWNWARD)
137
138typedef unsigned int fexcept_t;
139typedef unsigned int fenv_t;
140
141extern const fenv_t __fe_dfl_env;
142#define FE_DFL_ENV      (&__fe_dfl_env)
143
144#endif /* fenv.h */
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