Prefix

Introduction

In this lab you will first follow a tutorial on using the synopsys synthesis tools. Then, you will describe, at FSMD level, an entity that will compute the length of the prefix of two 16 bit binary strings. You may use the tutorial material as a starting point for this lab.

Assuming you know how to use Synopsys "vhdlan" and "vhdldbx", copy the following files into some directory in your home directory:

Now, follow these step to synthesize the "DIST" design:
  1. Analyze and Simulate "DIST.vhd" and "DIST_TB.vhd" to verify correctness.
  2. Run "dc_shell".
  3. Type "include DIST_syn.scr" and hit return. Wait for it to finish.
  4. Open "DIST_GATE.vhd" and comment out the line that reads "type UNSIGNED..." near the top of the file.
  5. Scroll down to the end of the "DIST_GATE.vhd" and insert the following configuration: configuration CFG_DIST_SYN of DIST is
    for SYN
    end for;
    end CFG_DIST_SYN;
  6. Modify the configuration in "DIST_TB.vhd" to use "WORK.CFG_DIST_SYN".
  7. Analyze and Simulate "DIST_GATE.vhd" and "DIST_TB.vhd" to verify correctness.

Prefix Length Example

Given: x = "001101", y = "0010101"
Compute prefix: "001"
Compute length: 3

Demo Output

Write an appropriate testbench and demo your FSMD and gate level simulations to your TA.