Transposed form FIR implementation, uses full precision

def main(self, x):
        """
        Transposed form FIR implementation, uses full precision
        """
        for i in range(len(self.taps_fix_reversed)):
            self.next.mul[i] = x * self.taps_fix_reversed[i]
            if i == 0:
                self.next.acc[0] = self.mul[i]
            else:
                self.next.acc[i] = self.acc[i - 1] + self.mul[i]

        self.next.out = self.acc[-1]
        return self.out