Sum of Absolute Differences

Objective

Create a PLB peripheral for calculating the sum of absolute differences (SAD) on arrays of 32-bit integers. Test attained acceleration when compared to a processor-only SAD implementation.

References

http://en.wikipedia.org/wiki/L1_norm

Requirements

1. Implement a circuit for SAD in Verilog (integrated within a user_logic.v peripheral template)
2. Implement a test-bench for the Verilog code
3. Analyze FPGA resource utilization of your circuit for different sizes of input vector (e.g, 8-16-32-128 integers)
4. Create an XPS system which uses the SAD peripheral and determine what is the maximum size of input arrays on the Nexys-2 Board
5. Implement the system and export it to SDK
6. Create a C code project for processor-only SAD on arrays of 1024 integers, and test speed.
7. Create a C code project for accelerated SAD on arrays of 1024 integers, and test speed.