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Diffstat (limited to 'tcc/include/fenv.h')
| -rw-r--r-- | tcc/include/fenv.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/tcc/include/fenv.h b/tcc/include/fenv.h new file mode 100644 index 0000000..258f3a5 --- /dev/null +++ b/tcc/include/fenv.h @@ -0,0 +1,108 @@ +/** + * This file has no copyright assigned and is placed in the Public Domain. + * This file is part of the w64 mingw-runtime package. + * No warranty is given; refer to the file DISCLAIMER within this package. + */ +#ifndef _FENV_H_ +#define _FENV_H_ + +#include <_mingw.h> + +/* FPU status word exception flags */ +#define FE_INVALID 0x01 +#define FE_DENORMAL 0x02 +#define FE_DIVBYZERO 0x04 +#define FE_OVERFLOW 0x08 +#define FE_UNDERFLOW 0x10 +#define FE_INEXACT 0x20 +#define FE_ALL_EXCEPT (FE_INVALID | FE_DENORMAL | FE_DIVBYZERO \ + | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT) + +/* FPU control word rounding flags */ +#define FE_TONEAREST 0x0000 +#define FE_DOWNWARD 0x0400 +#define FE_UPWARD 0x0800 +#define FE_TOWARDZERO 0x0c00 + +/* The MXCSR exception flags are the same as the + FE flags. */ +#define __MXCSR_EXCEPT_FLAG_SHIFT 0 + +/* How much to shift FE status word exception flags + to get MXCSR rounding flags, */ +#define __MXCSR_ROUND_FLAG_SHIFT 3 + +#ifndef RC_INVOKED +/* + For now, support only for the basic abstraction of flags that are + either set or clear. fexcept_t could be structure that holds more + info about the fp environment. +*/ +typedef unsigned short fexcept_t; + +/* This 32-byte struct represents the entire floating point + environment as stored by fnstenv or fstenv, augmented by + the contents of the MXCSR register, as stored by stmxcsr + (if CPU supports it). */ +typedef struct +{ + unsigned short __control_word; + unsigned short __unused0; + unsigned short __status_word; + unsigned short __unused1; + unsigned short __tag_word; + unsigned short __unused2; + unsigned int __ip_offset; /* instruction pointer offset */ + unsigned short __ip_selector; + unsigned short __opcode; + unsigned int __data_offset; + unsigned short __data_selector; + unsigned short __unused3; + unsigned int __mxcsr; /* contents of the MXCSR register */ +} fenv_t; + + +/*The C99 standard (7.6.9) allows us to define implementation-specific macros for + different fp environments */ + +/* The default Intel x87 floating point environment (64-bit mantissa) */ +#define FE_PC64_ENV ((const fenv_t *)-1) + +/* The floating point environment set by MSVCRT _fpreset (53-bit mantissa) */ +#define FE_PC53_ENV ((const fenv_t *)-2) + +/* The FE_DFL_ENV macro is required by standard. + fesetenv will use the environment set at app startup.*/ +#define FE_DFL_ENV ((const fenv_t *) 0) + +#ifdef __cplusplus +extern "C" { +#endif + +/*TODO: Some of these could be inlined */ +/* 7.6.2 Exception */ + +extern int __cdecl feclearexcept (int); +extern int __cdecl fegetexceptflag (fexcept_t * flagp, int excepts); +extern int __cdecl feraiseexcept (int excepts ); +extern int __cdecl fesetexceptflag (const fexcept_t *, int); +extern int __cdecl fetestexcept (int excepts); + +/* 7.6.3 Rounding */ + +extern int __cdecl fegetround (void); +extern int __cdecl fesetround (int mode); + +/* 7.6.4 Environment */ + +extern int __cdecl fegetenv(fenv_t * envp); +extern int __cdecl fesetenv(const fenv_t * ); +extern int __cdecl feupdateenv(const fenv_t *); +extern int __cdecl feholdexcept(fenv_t *); + +#ifdef __cplusplus +} +#endif +#endif /* Not RC_INVOKED */ + +#endif /* ndef _FENV_H */ |