function for addition 2^16 modulo

Addition modulo (denoted with a boxed plus ⊞)

what is the command for 2^16 addition modulo: a ⊞ b?

Can someone help?

[James Tursa]

Are a and b type double, or an integer type?

[Saranya Krishnamurthy]

binary

even if its integer its fine

Answer 1

[Bjorn Gustavsson]

Just make sure that your ints a and b are in int32 or larger number of bit-formats, then use:

C = mod(a+b,2^16)

HTH

[Saranya Krishnamurthy]

Thank you will try it

Answer 2

[John D'Errico]

Your numbers are in BINARY form, and you want to add modulo 2^16.

The simplest solution is to convert to a decimal integer. I'll assume they are stored as chars. But if they are boolean vectors, just as easy.

A = '101100110001';
B = '10010000001';

AplusB = mod(bin2dec(A) + bin2dec(B),2^16) % as a base 10 integer result

AplusB = 4018

AplusB = dec2bin(AplusB)

AplusB = '111110110010'

You can do it all in one line. Or, you could even write a little function.

binplus16 = @(a,b) dec2bin(mod(bin2dec(A) + bin2dec(B),2^16));
binplus16(A,B)

ans = '111110110010'

As you can see, the result is the same. We could have done it in a variety of ways. But this is simplest.

[Saranya Krishnamurthy]

okay will try it