Basically, yes. But, it is a lot more involved, and kind of barbaric and crude.
First, the whole stalks of the plant (containing hard stalks, long leaves, and pods with the wheat kernels [germs] inside, were all thrown on very hard-packed ground in a special area about the size of a basketball court between two small hills, or walls. A big pile of what looks like brush and weeds with the wind funneled across it by the side barriers.
Then the pile is beaten for a few hours with sticks till it is all beaten down to just a bunch of broken-up trash.
Then the whole mess is thrown up into the crosswinds. The useless lightweight shattered pulp is blown away while the heavier kernels of wheat fall back down to the hard floor. A couple of more hours of this, and all that is left on the floor is just the wheat.