module mul4x4
title '4x4 Combinational Multiplier'

X3..X0, Y3..Y0 pin;   " multiplicand, multiplier
P7..P0         pin istype 'com';    " product

P = [P7..P0];
PC1 = Y0 & [0, 0, 0, 0,X3,X2,X1,X0];
PC2 = Y1 & [0, 0, 0,X3,X2,X1,X0, 0];
PC3 = Y2 & [0, 0,X3,X2,X1,X0, 0, 0];
PC4 = Y3 & [0,X3,X2,X1,X0, 0, 0, 0];

equations
P = PC1 + PC2 + PC3 + PC4;

end mul4x4