| /** |
| * 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.PD 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 the MXCSR exeptions masks, */ |
| #define __MXCSR_EXCEPT_MASK_SHIFT 7 |
| |
| /* 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 */ |