1. Programming Assignment 4 Code generator Md. Zahurul Islam Center for Research on Bangla Language Processing (CRBLP) BRAC University

2. Outline  Project Details  What to do?  New classes  Changes on previous program  Lvalue and Rvalue  MIPS

3. Project Details  Code Generator Intel Architecture (X86) MIPS Architecture Java Virtual Machine (JVM) Common Language runtime (CLR)  Our Target: MIPS Architecture  SPIM Simulator

4. What to do?  Download starter-kit  Find out what you have to do  Try to understand our starter-kit  Take a look on our given solution  Read MIPS references Online references on course website Computer architecture book  Lets start!

5. New classes  Codegen.java Utility class for code generation  MIPSVisitor.java New visitor class to generate MIPS assembly code

6. Changes on previous program  Symbol class changes getOffset() setOffset() symOffset  FunDeclAst changes FuncFrameSize setFrameSize() getFrameSize()  NameVisitor changes cuFrameOffset …

7. Lvalue and Rvalue  Load (default)  Store  Manage it carefully

8. Closer look  Prolog  Epilog  Variables  Parameter  Arguments  Return value

9. MIPS  Stack Push pop  Registers Arguments Frame pointer Stack pointer Return address Return value

10. Sum Up  Project Details  What to Do?  New classes  Changes on previous program  Lvalue and Rvalue  MIPS