diff options
Diffstat (limited to 'math/math-svid-compat.h')
| -rw-r--r-- | math/math-svid-compat.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/math/math-svid-compat.h b/math/math-svid-compat.h new file mode 100644 index 0000000000..284cc13159 --- /dev/null +++ b/math/math-svid-compat.h @@ -0,0 +1,90 @@ +/* Declarations for SVID math error handling compatibility. + Copyright (C) 1991-2017 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 + +#ifndef __ASSEMBLER__ +/* 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 +#endif + +/* The above definitions may be used in testcases. The following code + is only used in the implementation. */ + +#ifdef _LIBC +# ifndef __ASSEMBLER__ +/* 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); +# endif + +# 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); +# elif !defined __ASSEMBLER__ +/* 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. */ |