diff options
Diffstat (limited to 'tinyc/win32/include/fenv.h')
| -rw-r--r-- | tinyc/win32/include/fenv.h | 101 |
1 files changed, 62 insertions, 39 deletions
diff --git a/tinyc/win32/include/fenv.h b/tinyc/win32/include/fenv.h index ddc43dfc8..258f3a5d9 100644 --- a/tinyc/win32/include/fenv.h +++ b/tinyc/win32/include/fenv.h @@ -1,15 +1,49 @@ -#ifndef _FENV_H -#define _FENV_H +/** + * 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. + either set or clear. fexcept_t could be structure that holds more + info about the fp environment. */ typedef unsigned short fexcept_t; -/* This 28-byte struct represents the entire floating point - environment as stored by fnstenv or fstenv */ +/* 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; @@ -24,58 +58,47 @@ typedef struct unsigned int __data_offset; unsigned short __data_selector; unsigned short __unused3; + unsigned int __mxcsr; /* contents of the MXCSR register */ } fenv_t; -/* 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 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 default floating point environment */ -#define FE_DFL_ENV ((const fenv_t *)-1) +/* 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) - -#ifndef RC_INVOKED #ifdef __cplusplus extern "C" { #endif - /*TODO: Some of these could be inlined */ /* 7.6.2 Exception */ -extern int feclearexcept (int); -extern int fegetexceptflag (fexcept_t * flagp, int excepts); -extern int feraiseexcept (int excepts ); -extern int fesetexceptflag (const fexcept_t *, int); -extern int fetestexcept (int excepts); - +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 fegetround (void); -extern int fesetround (int mode); - +extern int __cdecl fegetround (void); +extern int __cdecl fesetround (int mode); /* 7.6.4 Environment */ -extern int fegetenv (fenv_t * envp); -extern int fesetenv (const fenv_t * ); -extern int feupdateenv (const fenv_t *); -extern int feholdexcept (fenv_t *); +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 } |