diff options
| author | bellard <bellard> | 2005-04-14 23:49:21 +0000 |
|---|---|---|
| committer | bellard <bellard> | 2005-04-14 23:49:21 +0000 |
| commit | 4821702fb49c72216c307341dc3dfd5a3984cf83 (patch) | |
| tree | a26b97b558b47f741a1aebdc8a9962dd86b7436b /win32/include/fenv.h | |
| parent | d733dc752e8d19bdebca46678c70d04d4d1f6f76 (diff) | |
| download | tinycc-4821702fb49c72216c307341dc3dfd5a3984cf83.tar.gz tinycc-4821702fb49c72216c307341dc3dfd5a3984cf83.tar.bz2 | |
win32 merge
Diffstat (limited to 'win32/include/fenv.h')
| -rw-r--r-- | win32/include/fenv.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/win32/include/fenv.h b/win32/include/fenv.h new file mode 100644 index 0000000..c25b4b4 --- /dev/null +++ b/win32/include/fenv.h @@ -0,0 +1,85 @@ +#ifndef _FENV_H
+#define _FENV_H
+
+/*
+ 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 28-byte struct represents the entire floating point
+ environment as stored by fnstenv or fstenv */
+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;
+} 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 default floating point environment */
+#define FE_DFL_ENV ((const fenv_t *)-1)
+
+
+#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);
+
+
+/* 7.6.3 Rounding */
+
+extern int fegetround (void);
+extern int 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 *);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* Not RC_INVOKED */
+
+#endif /* ndef _FENV_H */
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