This is a simple processor implemented in SystemC. It implements a small set of instructions and performs a trivial pipeline, with only two stages and no true predictions.
The instruction word has the form:
| OPCODE | D | F1 | F2 |
|---|---|---|---|
| 4 bits | 9 bits | 9 bits | 9 bits |
And the instruction set is listed below:
| Instruction | Action | Example |
|---|---|---|
| AND | D<-F1 & F2 | AND 1 2 3 |
| OR | D<-F1 | F2 |
| XOR | D<-F1 ^ F2 | XOR 1 2 3 |
| NOT | D<- ~F1 | NOT 1 2 3 |
| CMP | Z<-1 if F1 == F2, N <-1 if F1 < F2 | CMP 1 2 3 |
| ADD | D <- F1 + F2 | ADD 1 2 3 |
| SUB | D <- F1 - F2 | SUB 1 2 3 |
| LD | R[D] <- MEM[F1] | LD 1 2 |
| ST | MEM[F1] <- R[D] | ST 1 2 |
| J | CP <- D | J 1 |
| JN | CP <- D, if N==1 | JN 1 |
| JZ | CP <- D, if Z==1 | JZ 1 |
| LRI | R[D] <- F1 | LRI 1 10 |
Internally, the processor has the following structure (please notice that control signals were omitted for organization purposes):
First of all, I strongly recommend installing SystemC 2.3.1 following this tutorial: http://chaitulabs.blogspot.com.br/2014/05/systemc-231-installation-in-ubuntu.html.
After that, enter the folder "processor" and execute the file ./compile.h. If it doesn't work, you can try to compile the file processor_run.cpp by yourself, indicating properly where the SystemC's libraries are.
Finally, execute the ./processor_run program, passing a file with a list of instructions as argument. If you need examples of algorithms for this processor, take a look at the folder "processor/tests".
Any suggestions or doubts, please refer to my e-mail, greati@ufrn.edu.br.