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107 lines
2.9 KiB
C
Vendored
107 lines
2.9 KiB
C
Vendored
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#ifndef _FENV_H_
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#define _FENV_H_
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#include <float.h>
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/* FPU status word exception flags */
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#define FE_INEXACT _SW_INEXACT
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#define FE_UNDERFLOW _SW_UNDERFLOW
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#define FE_OVERFLOW _SW_OVERFLOW
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#define FE_DIVBYZERO _SW_ZERODIVIDE
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#define FE_INVALID _SW_INVALID
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#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
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/* FPU control word rounding flags */
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#define FE_TONEAREST _RC_NEAR
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#define FE_UPWARD _RC_UP
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#define FE_DOWNWARD _RC_DOWN
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#define FE_TOWARDZERO _RC_CHOP
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#if defined(_ARM_) || defined(__arm__) || defined(_ARM64_) || defined(__aarch64__)
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/* Amount to shift by to convert an exception to a mask bit. */
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#define FE_EXCEPT_SHIFT 0x08
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#else
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/* The MXCSR exception flags are the same as the
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FE flags. */
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#define __MXCSR_EXCEPT_FLAG_SHIFT 0
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/* How much to shift FE status word exception flags
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to get the MXCSR exeptions masks, */
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#define __MXCSR_EXCEPT_MASK_SHIFT 7
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/* How much to shift FE status word exception flags
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to get MXCSR rounding flags, */
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#define __MXCSR_ROUND_FLAG_SHIFT 3
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#endif /* defined(_ARM_) || defined(__arm__) */
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#ifndef RC_INVOKED
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typedef struct
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{
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unsigned long _Fe_ctl;
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unsigned long _Fe_stat;
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} fenv_t;
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/* Type representing exception flags. */
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typedef unsigned long fexcept_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* The FE_DFL_ENV macro is required by standard.
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fesetenv will use the environment set at app startup.*/
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extern const fenv_t __mingw_fe_dfl_env;
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#define FE_DFL_ENV (&__mingw_fe_dfl_env)
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/* The C99 standard (7.6.9) allows us to define implementation-specific macros for
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different fp environments */
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#if defined(__i386__) || defined(__x86_64__)
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/* The default Intel x87 floating point environment (64-bit mantissa) */
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extern const fenv_t __mingw_fe_pc64_env;
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#define FE_PC64_ENV (&__mingw_fe_pc64_env)
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/* The floating point environment set by MSVCRT _fpreset (53-bit mantissa) */
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extern const fenv_t __mingw_fe_pc53_env;
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#define FE_PC53_ENV (&__mingw_fe_pc53_env)
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#endif
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/*TODO: Some of these could be inlined */
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/* 7.6.2 Exception */
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extern int __cdecl feclearexcept (int);
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extern int __cdecl fegetexceptflag (fexcept_t * flagp, int excepts);
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extern int __cdecl feraiseexcept (int excepts );
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extern int __cdecl fesetexceptflag (const fexcept_t *, int);
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extern int __cdecl fetestexcept (int excepts);
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/* 7.6.3 Rounding */
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extern int __cdecl fegetround (void);
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extern int __cdecl fesetround (int mode);
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/* 7.6.4 Environment */
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extern int __cdecl fegetenv(fenv_t * envp);
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extern int __cdecl fesetenv(const fenv_t * );
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extern int __cdecl feupdateenv(const fenv_t *);
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extern int __cdecl feholdexcept(fenv_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* Not RC_INVOKED */
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#endif /* ndef _FENV_H */
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