54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
#ifndef _FENV_H
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#define _FENV_H 1
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// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/fenv.h.html
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#include <stdint.h>
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#define FE_INVALID (1 << 0)
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#define FE_DIVBYZERO (1 << 2)
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#define FE_OVERFLOW (1 << 3)
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#define FE_UNDERFLOW (1 << 4)
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#define FE_INEXACT (1 << 5)
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#define FE_ALL_EXCEPT (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
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#define FE_TONEAREST 0
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#define FE_DOWNWARD 1
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#define FE_UPWARD 2
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#define FE_TOWARDZERO 3
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typedef struct {
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uint32_t control;
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uint32_t status;
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uint32_t __unused[5];
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} __x87_fpu_t;
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typedef struct {
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__x87_fpu_t x87_fpu;
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uint32_t mxcsr;
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} fenv_t;
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typedef uint8_t fexcept_t;
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#define FE_DFL_ENV ((const fenv_t*)0x1)
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int feclearexcept(int);
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int fegetenv(fenv_t*);
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int fegetexceptflag(fexcept_t*, int);
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int fegetround(void);
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int feholdexcept(fenv_t*);
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int feraiseexcept(int);
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int fesetenv(const fenv_t*);
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int fesetexceptflag(const fexcept_t*, int);
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int fesetround(int);
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int fetestexcept(int);
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int feupdateenv(const fenv_t*);
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__END_DECLS
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#endif
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