dcodeIO/webassembly

#define FE_INVALID    1
#define __FE_DENORM   2
#define FE_DIVBYZERO  4
#define FE_OVERFLOW   8
#define FE_UNDERFLOW  16
#define FE_INEXACT    32

#define FE_ALL_EXCEPT 63

#define FE_TONEAREST  0
#define FE_DOWNWARD   0x400
#define FE_UPWARD     0x800
#define FE_TOWARDZERO 0xc00

typedef unsigned short fexcept_t;

typedef struct {
    unsigned short __control_word;
    unsigned short __unused1;
    unsigned short __status_word;
    unsigned short __unused2;
    unsigned short __tags;
    unsigned short __unused3;
    unsigned int __eip;
    unsigned short __cs_selector;
    unsigned int __opcode:11;
    unsigned int __unused4:5;
    unsigned int __data_offset;
    unsigned short __data_selector;
    unsigned short __unused5;
    unsigned int __mxcsr;
} fenv_t;

#define FE_DFL_ENV      ((const fenv_t *) -1)