This graph shows which files directly or indirectly include this file:

Classes
union	_FTO64_UNION

Macros
#define	FRACTION_LEN 23

#define	EXPONENT_LEN 8

#define	SIGN_MASK (((FINT_TYPE)1) << (FRACTION_LEN + EXPONENT_LEN))

#define	FRACTION_ONE (((FINT_TYPE)1) << FRACTION_LEN)

#define	FRACTION_MASK ((FRACTION_ONE) - 1)

#define	EXPONENT_MASK ((1 << EXPONENT_LEN) - 1)

#define	EXPONENT_ZERO ((1 << (EXPONENT_LEN - 1)) - 1)

#define	EXPONENT_MAX 63

#define	INTNAN 0xFFFFFFFFFFFFFFFFULL

#define	EXPONENT_INFINITY EXPONENT_MASK

#define	NEGATE(x) (~(x) + 1)

Typedefs
typedef float	FLOAT_TYPE

typedef unsigned int	FINT_TYPE

typedef unsigned long long	FTO64_RESULT

typedef union _FTO64_UNION	FTO64_UNION

Functions
FTO64_RESULT	__fto64 (FLOAT_TYPE fvalue)

Macro Definition Documentation

◆ EXPONENT_INFINITY

#define EXPONENT_INFINITY EXPONENT_MASK

Definition at line 48 of file __fto64.h.

◆ EXPONENT_LEN

#define EXPONENT_LEN 8

Definition at line 17 of file __fto64.h.

◆ EXPONENT_MASK

#define EXPONENT_MASK ((1 << EXPONENT_LEN) - 1)

Definition at line 37 of file __fto64.h.

◆ EXPONENT_MAX

#define EXPONENT_MAX 63

Definition at line 44 of file __fto64.h.

◆ EXPONENT_ZERO

#define EXPONENT_ZERO ((1 << (EXPONENT_LEN - 1)) - 1)

Definition at line 38 of file __fto64.h.

◆ FRACTION_LEN

#define FRACTION_LEN 23

Definition at line 16 of file __fto64.h.

◆ FRACTION_MASK

#define FRACTION_MASK ((FRACTION_ONE) - 1)

Definition at line 35 of file __fto64.h.

◆ FRACTION_ONE

#define FRACTION_ONE (((FINT_TYPE)1) << FRACTION_LEN)

Definition at line 34 of file __fto64.h.

◆ INTNAN

#define INTNAN 0xFFFFFFFFFFFFFFFFULL

Definition at line 45 of file __fto64.h.

◆ NEGATE

#define NEGATE ( x ) (~(x) + 1)

Definition at line 50 of file __fto64.h.

◆ SIGN_MASK

#define SIGN_MASK (((FINT_TYPE)1) << (FRACTION_LEN + EXPONENT_LEN))

Definition at line 32 of file __fto64.h.

Typedef Documentation

◆ FINT_TYPE

typedef unsigned int FINT_TYPE

Definition at line 15 of file __fto64.h.

◆ FLOAT_TYPE

typedef float FLOAT_TYPE

Definition at line 14 of file __fto64.h.

◆ FTO64_RESULT

typedef unsigned long long FTO64_RESULT

Definition at line 24 of file __fto64.h.

◆ FTO64_UNION

typedef union _FTO64_UNION FTO64_UNION

Function Documentation

◆ __fto64()

FTO64_RESULT __fto64 ( FLOAT_TYPE fvalue )

Definition at line 53 of file __fto64.h.

{
    FTO64_UNION u = { .value = fvalue };
    FINT_TYPE value = u.raw;
    int exponent;
    FTO64_RESULT fraction;
 
    exponent = (int)(value >> FRACTION_LEN);
    exponent &= EXPONENT_MASK;
 
    /* infinity and other NaNs */
    if (exponent == EXPONENT_INFINITY)
        return INTNAN;
 
    /* subnormals and signed zeros */
    if (exponent == 0)
        return 0;
 
    exponent -= EXPONENT_ZERO;
 
    /* number is less then one */
    if (exponent < 0)
        return 0;
 
    /* number is too big */
    if (exponent > EXPONENT_MAX)
        return INTNAN;
 
#ifndef _USE_SIGNED_
    if (value & SIGN_MASK)
        return INTNAN;
#endif
 
    fraction = value & FRACTION_MASK;
    fraction |= FRACTION_ONE;
 
    exponent -= FRACTION_LEN;
    if (exponent != 0)
    {
        if (exponent < 0)
            fraction = fraction >> NEGATE(exponent);
        else
            fraction = fraction << exponent;
    }
 
#ifdef _USE_SIGNED_
    if (value & SIGN_MASK)
        fraction = NEGATE(fraction);
#endif
 
    return fraction;
}

Classes

Macros

Typedefs

Functions