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annotate fuhtark_test/include/fenv.h @ 1501:f40d9d814c08 default tip main

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did: correct vulkan-api generator
author sam <sam@basx.dev>
date Wed, 26 Nov 2025 23:34:29 +0700
parents 91c8c3b7cbf0
children
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1 /**
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2 * This file has no copyright assigned and is placed in the Public Domain.
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3 * This file is part of the w64 mingw-runtime package.
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4 * No warranty is given; refer to the file DISCLAIMER within this package.
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5 */
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6 #ifndef _FENV_H_
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7 #define _FENV_H_
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8
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9 #include <_mingw.h>
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10
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11 /* FPU status word exception flags */
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12 #define FE_INVALID 0x01
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13 #define FE_DENORMAL 0x02
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14 #define FE_DIVBYZERO 0x04
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15 #define FE_OVERFLOW 0x08
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16 #define FE_UNDERFLOW 0x10
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17 #define FE_INEXACT 0x20
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18 #define FE_ALL_EXCEPT (FE_INVALID | FE_DENORMAL | FE_DIVBYZERO \
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19 | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
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20
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21 /* FPU control word rounding flags */
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22 #define FE_TONEAREST 0x0000
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23 #define FE_DOWNWARD 0x0400
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24 #define FE_UPWARD 0x0800
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25 #define FE_TOWARDZERO 0x0c00
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26
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27 /* The MXCSR exception flags are the same as the
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28 FE flags. */
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29 #define __MXCSR_EXCEPT_FLAG_SHIFT 0
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30
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31 /* How much to shift FE status word exception flags
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32 to get MXCSR rounding flags, */
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33 #define __MXCSR_ROUND_FLAG_SHIFT 3
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34
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35 #ifndef RC_INVOKED
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36 /*
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37 For now, support only for the basic abstraction of flags that are
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38 either set or clear. fexcept_t could be structure that holds more
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39 info about the fp environment.
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40 */
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41 typedef unsigned short fexcept_t;
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42
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43 /* This 32-byte struct represents the entire floating point
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44 environment as stored by fnstenv or fstenv, augmented by
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45 the contents of the MXCSR register, as stored by stmxcsr
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46 (if CPU supports it). */
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47 typedef struct
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48 {
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49 unsigned short __control_word;
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50 unsigned short __unused0;
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51 unsigned short __status_word;
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52 unsigned short __unused1;
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53 unsigned short __tag_word;
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54 unsigned short __unused2;
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55 unsigned int __ip_offset; /* instruction pointer offset */
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56 unsigned short __ip_selector;
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57 unsigned short __opcode;
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58 unsigned int __data_offset;
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59 unsigned short __data_selector;
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60 unsigned short __unused3;
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61 unsigned int __mxcsr; /* contents of the MXCSR register */
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62 } fenv_t;
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63
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64
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65 /*The C99 standard (7.6.9) allows us to define implementation-specific macros for
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66 different fp environments */
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67
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68 /* The default Intel x87 floating point environment (64-bit mantissa) */
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69 #define FE_PC64_ENV ((const fenv_t *)-1)
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70
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71 /* The floating point environment set by MSVCRT _fpreset (53-bit mantissa) */
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72 #define FE_PC53_ENV ((const fenv_t *)-2)
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73
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74 /* The FE_DFL_ENV macro is required by standard.
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75 fesetenv will use the environment set at app startup.*/
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76 #define FE_DFL_ENV ((const fenv_t *) 0)
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77
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78 #ifdef __cplusplus
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79 extern "C" {
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80 #endif
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81
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82 /*TODO: Some of these could be inlined */
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83 /* 7.6.2 Exception */
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84
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85 extern int __cdecl feclearexcept (int);
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86 extern int __cdecl fegetexceptflag (fexcept_t * flagp, int excepts);
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87 extern int __cdecl feraiseexcept (int excepts );
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88 extern int __cdecl fesetexceptflag (const fexcept_t *, int);
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89 extern int __cdecl fetestexcept (int excepts);
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90
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91 /* 7.6.3 Rounding */
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92
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93 extern int __cdecl fegetround (void);
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94 extern int __cdecl fesetround (int mode);
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95
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96 /* 7.6.4 Environment */
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97
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98 extern int __cdecl fegetenv(fenv_t * envp);
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99 extern int __cdecl fesetenv(const fenv_t * );
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100 extern int __cdecl feupdateenv(const fenv_t *);
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101 extern int __cdecl feholdexcept(fenv_t *);
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102
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103 #ifdef __cplusplus
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104 }
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105 #endif
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106 #endif /* Not RC_INVOKED */
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107
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108 #endif /* ndef _FENV_H */