| /* Declarations for SVID math error handling compatibility. |
| Copyright (C) 1991-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _MATH_SVID_COMPAT_H |
| #define _MATH_SVID_COMPAT_H 1 |
| |
| /* Support for various different standard error handling behaviors. */ |
| typedef enum |
| { |
| _IEEE_ = -1, /* According to IEEE 754/IEEE 854. */ |
| _SVID_, /* According to System V, release 4. */ |
| _XOPEN_, /* Nowadays also Unix98. */ |
| _POSIX_, |
| _ISOC_ /* Actually this is ISO C99. */ |
| } _LIB_VERSION_TYPE; |
| |
| /* This variable can be changed at run-time to any of the values above to |
| affect floating point error handling behavior (it may also be necessary |
| to change the hardware FPU exception settings). */ |
| extern _LIB_VERSION_TYPE _LIB_VERSION; |
| |
| /* In SVID error handling, `matherr' is called with this description |
| of the exceptional condition. */ |
| struct exception |
| { |
| int type; |
| char *name; |
| double arg1; |
| double arg2; |
| double retval; |
| }; |
| |
| extern int matherr (struct exception *__exc); |
| extern int __matherr (struct exception *__exc); |
| |
| #define X_TLOSS 1.41484755040568800000e+16 |
| |
| /* Types of exceptions in the `type' field. */ |
| #define DOMAIN 1 |
| #define SING 2 |
| #define OVERFLOW 3 |
| #define UNDERFLOW 4 |
| #define TLOSS 5 |
| #define PLOSS 6 |
| |
| /* SVID mode specifies returning this large value instead of infinity. */ |
| #define HUGE 3.40282347e+38F |
| |
| /* The above definitions may be used in testcases. The following code |
| is only used in the implementation. */ |
| |
| #ifdef _LIBC |
| /* fdlibm kernel function */ |
| extern double __kernel_standard (double, double, int); |
| extern float __kernel_standard_f (float, float, int); |
| extern long double __kernel_standard_l (long double, long double, int); |
| |
| # include <shlib-compat.h> |
| # define LIBM_SVID_COMPAT SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_27) |
| # if LIBM_SVID_COMPAT |
| compat_symbol_reference (libm, matherr, matherr, GLIBC_2_0); |
| compat_symbol_reference (libm, _LIB_VERSION, _LIB_VERSION, GLIBC_2_0); |
| # else |
| /* Except when building compat code, optimize out references to |
| _LIB_VERSION and matherr. */ |
| # define _LIB_VERSION _POSIX_ |
| # define matherr(EXC) ((void) (EXC), 0) |
| # endif |
| #endif |
| |
| #endif /* math-svid-compat.h. */ |