c - How do I programmatically return the max of two integers without using any comparison operators and without using if, else, etc?

Question

How do I programmatically return the maximum of two integers without using any comparison operators and without using if, else, etc?

Answer 1

max: // Will put MAX(a,b) into a

a -= b;
a &= (~a) >> 31;
a += b;

And:

int a, b;

min: // Will put MIN(a,b) into a

a -= b;
a &= a >> 31;
a += b;

from here.