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813378e9 | 1 | /* Declarations for SVID math error handling compatibility. |
04277e02 | 2 | Copyright (C) 1991-2019 Free Software Foundation, Inc. |
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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 _MATH_SVID_COMPAT_H | |
20 | #define _MATH_SVID_COMPAT_H 1 | |
21 | ||
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22 | /* Support for various different standard error handling behaviors. */ |
23 | typedef enum | |
24 | { | |
25 | _IEEE_ = -1, /* According to IEEE 754/IEEE 854. */ | |
26 | _SVID_, /* According to System V, release 4. */ | |
27 | _XOPEN_, /* Nowadays also Unix98. */ | |
28 | _POSIX_, | |
29 | _ISOC_ /* Actually this is ISO C99. */ | |
30 | } _LIB_VERSION_TYPE; | |
31 | ||
32 | /* This variable can be changed at run-time to any of the values above to | |
33 | affect floating point error handling behavior (it may also be necessary | |
34 | to change the hardware FPU exception settings). */ | |
35 | extern _LIB_VERSION_TYPE _LIB_VERSION; | |
36 | ||
37 | /* In SVID error handling, `matherr' is called with this description | |
38 | of the exceptional condition. */ | |
39 | struct exception | |
40 | { | |
41 | int type; | |
42 | char *name; | |
43 | double arg1; | |
44 | double arg2; | |
45 | double retval; | |
46 | }; | |
47 | ||
48 | extern int matherr (struct exception *__exc); | |
49 | extern int __matherr (struct exception *__exc); | |
50 | ||
a48c0fb4 | 51 | #define X_TLOSS 1.41484755040568800000e+16 |
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52 | |
53 | /* Types of exceptions in the `type' field. */ | |
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54 | #define DOMAIN 1 |
55 | #define SING 2 | |
56 | #define OVERFLOW 3 | |
57 | #define UNDERFLOW 4 | |
58 | #define TLOSS 5 | |
59 | #define PLOSS 6 | |
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60 | |
61 | /* SVID mode specifies returning this large value instead of infinity. */ | |
a48c0fb4 | 62 | #define HUGE 3.40282347e+38F |
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63 | |
64 | /* The above definitions may be used in testcases. The following code | |
65 | is only used in the implementation. */ | |
66 | ||
67 | #ifdef _LIBC | |
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68 | /* fdlibm kernel function */ |
69 | extern double __kernel_standard (double, double, int); | |
70 | extern float __kernel_standard_f (float, float, int); | |
71 | extern long double __kernel_standard_l (long double, long double, int); | |
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72 | |
73 | # include <shlib-compat.h> | |
74 | # define LIBM_SVID_COMPAT SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_27) | |
75 | # if LIBM_SVID_COMPAT | |
76 | compat_symbol_reference (libm, matherr, matherr, GLIBC_2_0); | |
77 | compat_symbol_reference (libm, _LIB_VERSION, _LIB_VERSION, GLIBC_2_0); | |
a48c0fb4 | 78 | # else |
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79 | /* Except when building compat code, optimize out references to |
80 | _LIB_VERSION and matherr. */ | |
81 | # define _LIB_VERSION _POSIX_ | |
82 | # define matherr(EXC) ((void) (EXC), 0) | |
83 | # endif | |
84 | #endif | |
85 | ||
86 | #endif /* math-svid-compat.h. */ |