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 | |
---|
138 | typedef unsigned int fexcept_t; |
---|
139 | typedef unsigned int fenv_t; |
---|
140 | |
---|
141 | extern const fenv_t __fe_dfl_env; |
---|
142 | #define FE_DFL_ENV (&__fe_dfl_env) |
---|
143 | |
---|
144 | #endif /* fenv.h */ |
---|