fixunstfti.c File Reference

#include "fp128.h"

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Typedefs
typedef float128_t	fp_t
typedef unsigned __int128	tu_int
typedef __int128	rep_t

Functions
tu_int	___fixunstfti (fp_t a)

Typedef Documentation

fp_t

typedef float128_t fp_t

Definition at line 13 of file fixunstfti.c.

rep_t

typedef __int128 rep_t

Definition at line 16 of file fixunstfti.c.

tu_int

typedef unsigned __int128 tu_int

Definition at line 15 of file fixunstfti.c.

Function Documentation

___fixunstfti()

tu_int ___fixunstfti

(

fp_t

a

)

Definition at line 18 of file fixunstfti.c.

                             {
    // Break a into sign, exponent, significand
    const rep_t aRep = toRep(a);
    const rep_t aAbs = aRep & absMask;
    const int sign = aRep & signBit ? -1 : 1;
    const int exponent = (aAbs >> significandBits) - exponentBias;
    const rep_t significand = (aAbs & significandMask) | implicitBit;
 
    // If either the value or the exponent is negative, the result is zero.
    if (sign == -1 || exponent < 0)
        return 0;
 
    // If the value is too large for the integer type, saturate.
    if ((unsigned)exponent >= sizeof(fixuint_t) * CHAR_BIT)
        return ~(fixuint_t)0;
 
    // If 0 <= exponent < significandBits, right shift to get the result.
    // Otherwise, shift left.
    if (exponent < significandBits)
        return significand >> (significandBits - exponent);
    else
        return (fixuint_t)significand << (exponent - significandBits);
}

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