Question

What I want to do is have Q – 10 bit & C – 4 bit and perform the operation –

Q,C = Q,C << 1 (left shift MSB of C into LSB of Q)

Where Q,C is 14 bit treated like a structure in C. This is natively supported in verilog, can be achieved with structures in C. How do I do something similar in MATLAB?

Answer 1

I don’t think matlab supports c style unions. It does have the bitshift function that enables you to solve this problem using arithmetic.

% Q is 10 bits, C is 4 bits
% Create QC. 
QC = bitshift(Q, 4) + C;  

% Bit shift QC by 1
QC = bitshift(QC,1);

%Grab QC bits 13->4 and save as Q
Q = bitshift(QC, -4);

%get QC bits 3->0 and save as C
C = bitand(QC, 2^(4+1)-1);