سير العمل البرمجي · فك قيم binary16

from math import copysign, ldexp

def binary16_value(word):
    if type(word) is not int or not 0 <= word <= 65535:
        raise ValueError("binary16.word")
    sign = -1.0 if word & 0x8000 else 1.0
    exponent, fraction = (word >> 10) & 31, word & 1023
    if exponent == 31:
        return copysign(float("nan") if fraction else float("inf"), sign)
    value = ldexp(fraction, -24) if exponent == 0 else ldexp(1024+fraction, exponent-25)
    return copysign(value, sign)