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2b778ceb | 1 | /* Copyright (C) 1998-2021 Free Software Foundation, Inc. |
ea0499d2 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
ea0499d2 UD |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3214b89b | 12 | Lesser General Public License for more details. |
ea0499d2 | 13 | |
3214b89b | 14 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff | 15 | License along with the GNU C Library. If not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
ea0499d2 UD |
17 | |
18 | #ifndef _FENV_H | |
19 | # error "Never use <bits/fenv.h> directly; include <fenv.h> instead." | |
20 | #endif | |
21 | ||
22 | ||
506d7fb1 JM |
23 | #ifdef __mips_hard_float |
24 | ||
ea0499d2 UD |
25 | /* Define bits representing the exception. We use the bit positions |
26 | of the appropriate bits in the FPU control word. */ | |
27 | enum | |
28 | { | |
fbeafede | 29 | FE_INEXACT = |
506d7fb1 | 30 | # define FE_INEXACT 0x04 |
fbeafede JM |
31 | FE_INEXACT, |
32 | FE_UNDERFLOW = | |
506d7fb1 | 33 | # define FE_UNDERFLOW 0x08 |
fbeafede JM |
34 | FE_UNDERFLOW, |
35 | FE_OVERFLOW = | |
506d7fb1 | 36 | # define FE_OVERFLOW 0x10 |
fbeafede JM |
37 | FE_OVERFLOW, |
38 | FE_DIVBYZERO = | |
506d7fb1 | 39 | # define FE_DIVBYZERO 0x20 |
fbeafede JM |
40 | FE_DIVBYZERO, |
41 | FE_INVALID = | |
506d7fb1 | 42 | # define FE_INVALID 0x40 |
fbeafede | 43 | FE_INVALID, |
ea0499d2 UD |
44 | }; |
45 | ||
506d7fb1 | 46 | # define FE_ALL_EXCEPT \ |
ea0499d2 UD |
47 | (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) |
48 | ||
49 | /* The MIPS 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 | { | |
fbeafede | 54 | FE_TONEAREST = |
506d7fb1 | 55 | # define FE_TONEAREST 0x0 |
fbeafede JM |
56 | FE_TONEAREST, |
57 | FE_TOWARDZERO = | |
506d7fb1 | 58 | # define FE_TOWARDZERO 0x1 |
fbeafede JM |
59 | FE_TOWARDZERO, |
60 | FE_UPWARD = | |
506d7fb1 | 61 | # define FE_UPWARD 0x2 |
fbeafede JM |
62 | FE_UPWARD, |
63 | FE_DOWNWARD = | |
506d7fb1 | 64 | # define FE_DOWNWARD 0x3 |
fbeafede | 65 | FE_DOWNWARD |
ea0499d2 UD |
66 | }; |
67 | ||
506d7fb1 JM |
68 | #else |
69 | ||
70 | /* In the soft-float case, only rounding to nearest is supported, with | |
71 | no exceptions. */ | |
72 | ||
73 | enum | |
74 | { | |
75 | __FE_UNDEFINED = -1, | |
76 | ||
77 | FE_TONEAREST = | |
78 | # define FE_TONEAREST 0x0 | |
79 | FE_TONEAREST | |
80 | }; | |
81 | ||
82 | # define FE_ALL_EXCEPT 0 | |
83 | ||
84 | #endif | |
85 | ||
ea0499d2 UD |
86 | |
87 | /* Type representing exception flags. */ | |
88 | typedef unsigned short int fexcept_t; | |
89 | ||
90 | ||
91 | /* Type representing floating-point environment. This function corresponds | |
92 | to the layout of the block written by the `fstenv'. */ | |
93 | typedef struct | |
94 | { | |
d3cbb980 | 95 | unsigned int __fp_control_register; |
ea0499d2 UD |
96 | } |
97 | fenv_t; | |
98 | ||
99 | /* If the default argument is used we use this value. */ | |
7b966fcb | 100 | #define FE_DFL_ENV ((const fenv_t *) -1) |
8ebc36ad | 101 | |
506d7fb1 | 102 | #if defined __USE_GNU && defined __mips_hard_float |
8ebc36ad | 103 | /* Floating-point environment where none of the exception is masked. */ |
7b966fcb | 104 | # define FE_NOMASK_ENV ((const fenv_t *) -2) |
8ebc36ad | 105 | #endif |
ec94343f | 106 | |
0175c9e9 | 107 | #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) |
ec94343f JM |
108 | /* Type representing floating-point control modes. */ |
109 | typedef unsigned int femode_t; | |
110 | ||
111 | /* Default floating-point control modes. */ | |
112 | # define FE_DFL_MODE ((const femode_t *) -1L) | |
113 | #endif |