1. Building block to sort two numbers
The 2 number sorter is a basic building block used for sorting higher number of inputs
The building block of two number sorter is as shown
It has two inputs and two outputs
The two inputs A and B are sorted and are given out as a high number H and low number L
2 number
sorter A B H L

2. Sorting four numbers using the 2 number sorter
Four numbers are sorted using the 2 number sorter as shown
2 number
sorter A B C D H1 L1 H2 L2 HH LL HL LH

3. Eval component eval A B C z x A2 eval A4 A3 A1 A0 Y
An evaluator component is as shown
It takes three integer inputs A, B, C
and gives one integer output Z
Z = A * B + C
Implementing the function given with
the eval components
Y = A0 + A1 * X1 + A2 * X2 + A3 * X3 + A4 * X4
or Y = ( ( (A4 * X + A3 ) * X + A2 ) * X + A1 ) * X + A0
eval A B C z x A2
eval A4 A3 A1 A0 Y