in the floating point number system f=[a=2,k−=−4,k+=4,t=6] the normalized, regularly rounded representation of 0.435 is: 2−3⋅0.111101 20⋅0.111000 2−2⋅0.111000 2−1⋅0.111000 2−2⋅0.111010 2−1⋅0.101100 in matlab

In order to convert 0.435 to its normalized, regularly rounded representation in the given floating-point number system f=[a=2,k−=−4,k+=4,t=6], we need to follow these steps:

  1. Determine the sign of the number, which in this case is positive.
  2. Convert 0.435 to binary representation, which is: 0.01110011111...
  3. Determine the exponent of the number using the formula e = floor(log2(|0.435|)) + 4, which gives us an exponent of -2.
  4. Since the exponent is negative, we need to shift the binary representation of the number to the right by |e| bits, which in this case is 2 bits. This gives us: 0.00011100111...
  5. Determine the significand of the number by taking the first t - 1 bits of the shifted binary representation. In this case, t is 6, so the significand is 0.000111.
  6. Round the significand to the nearest representable value in the given floating-point system, which is 0.000110, since the next bit is 1 and would require rounding up.
  7. Combine the sign, exponent, and significand to get the final representation, which is: 0 01110 000110

In MATLAB, we can perform these steps using the following code:

main.m
% Constants defined by the problem
a = 2;
kMinus = -4;
kPlus = 4;
t = 6;

% Input number to represent
x = 0.435;

% Determine sign of number
s = 0; % 0 for positive, 1 for negative

% Convert number to binary representation
b = dec2bin(typecast(single(x), 'uint32'));

% Determine exponent of number
e = floor(log2(abs(x))) + kPlus;
if e < kMinus
    % Number is too small to represent, so round to zero
    f = zeros(1, t);
else
    % Compute shifted significand and round to nearest representable value
    f = b(2:end);
    f = padarray(f, [0 -e-1], 'pre', '0');
    f = padarray(f, [t-1-length(f) 0], 'post', '0');
    if f(t-1) == '1' && (~all(f(t:end) == '0') || mod(sum(f(1:t-2)), 2) == 1)
        % Round up
        f = dec2bin(bin2dec(f) + 1, t);
    end
end

% Convert exponent to binary representation
if e < kMinus || e >= kPlus
    expBits = dec2bin(0, a);
else
    expBits = dec2bin(e - kMinus, a);
end

% Combine sign, exponent, and significand to get final representation
bits = [num2str(s) expBits f];
1019 chars
41 lines

The result in bits variable should be '001110000110', which corresponds to the final representation 0 01110 000110.

related categories

gistlibby LogSnag