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5f72b005 | 1 | /* Floating point environment. C-SKY version. |
04277e02 | 2 | Copyright (C) 2018-2019 Free Software Foundation, Inc. |
5f72b005 MH |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library. If not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef _FENV_H | |
20 | # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." | |
21 | #endif | |
22 | ||
23 | #ifdef __csky_hard_float__ | |
24 | /* Define bits representing the exception. We use the bit positions | |
25 | of the appropriate bits in the FPU control word. */ | |
26 | enum | |
27 | { | |
28 | FE_INVALID = | |
29 | #define FE_INVALID 0x01 | |
30 | FE_INVALID, | |
31 | FE_DIVBYZERO = | |
32 | #define FE_DIVBYZERO 0x02 | |
33 | FE_DIVBYZERO, | |
34 | FE_OVERFLOW = | |
35 | #define FE_OVERFLOW 0x04 | |
36 | FE_OVERFLOW, | |
37 | FE_UNDERFLOW = | |
38 | #define FE_UNDERFLOW 0x08 | |
39 | FE_UNDERFLOW, | |
40 | FE_INEXACT = | |
41 | #define FE_INEXACT 0x10 | |
42 | FE_INEXACT, | |
43 | __FE_DENORMAL = 0x20 | |
44 | }; | |
45 | ||
46 | #define FE_ALL_EXCEPT \ | |
47 | (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) | |
48 | ||
49 | /* The C-SKY FPU supports all of the four defined rounding modes. We | |
50 | use again the bit positions in the FPU control word as the values | |
51 | for the appropriate macros. */ | |
52 | enum | |
53 | { | |
54 | FE_TONEAREST = | |
55 | #define FE_TONEAREST (0x0 << 24) | |
56 | FE_TONEAREST, | |
57 | FE_TOWARDZERO = | |
58 | #define FE_TOWARDZERO (0x1 << 24) | |
59 | FE_TOWARDZERO, | |
60 | FE_UPWARD = | |
61 | #define FE_UPWARD (0x2 << 24) | |
62 | FE_UPWARD, | |
63 | FE_DOWNWARD = | |
64 | #define FE_DOWNWARD (0x3 << 24) | |
65 | FE_DOWNWARD, | |
66 | __FE_ROUND_MASK = (0x3 << 24) | |
67 | }; | |
68 | ||
69 | #else | |
70 | ||
71 | /* In the soft-float case, only rounding to nearest is supported, with | |
72 | no exceptions. */ | |
73 | ||
74 | enum | |
75 | { | |
76 | __FE_UNDEFINED = -1, | |
77 | ||
78 | FE_TONEAREST = | |
79 | # define FE_TONEAREST 0x0 | |
80 | FE_TONEAREST | |
81 | }; | |
82 | ||
83 | # define FE_ALL_EXCEPT 0 | |
84 | ||
85 | #endif | |
86 | ||
87 | /* Type representing exception flags. */ | |
88 | typedef unsigned int fexcept_t; | |
89 | ||
90 | /* Type representing floating-point environment. */ | |
91 | typedef struct | |
92 | { | |
93 | unsigned int __fpcr; | |
94 | unsigned int __fpsr; | |
95 | } fenv_t; | |
96 | ||
97 | /* If the default argument is used we use this value. */ | |
98 | #define FE_DFL_ENV ((const fenv_t *) -1) | |
99 | ||
100 | #if defined __USE_GNU && defined __csky_hard_float__ | |
101 | /* Floating-point environment where none of the exceptions are masked. */ | |
102 | # define FE_NOMASK_ENV ((const fenv_t *) -2) | |
103 | #endif | |
104 | ||
0175c9e9 | 105 | #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) |
5f72b005 MH |
106 | /* Type representing floating-point control modes. */ |
107 | typedef unsigned int femode_t; | |
108 | ||
109 | /* Default floating-point control modes. */ | |
110 | # define FE_DFL_MODE ((const femode_t *) -1L) | |
111 | #endif |