CSE2021

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====== Memory and M/L ======

This lecture covers memory segments, memory variables, memory instructions, the role of the stack, and machine language (M/L).



===== Outline =====

  * The Memory Map
  * Declaration of Variables in ''.data''
  * The Load/Store Family
  * Spilling Data to the stack
  * Stack Frames for method invocation
  * Creating a machine language program
  * Instruction Formats
  * Techniques for handling large immediates

===== Big Ideas =====

  * Classes and objects are on the heap
  * Code is in .text
  * Everything else is in a stack frame on the stack
  * Implementing Recursion 
  * Fixing the instruction size and varying the format is a good compromise between the simplicity of regularity and the inefficiency of variable-size instructions.



===== Slides from Lecture =====

  * [[http://www.cse.yorku.ca/~roumani/course/2021/loadStore.pdf|The Load/Store Family]]
  * [[http://www.cse.yorku.ca/~roumani/course/2021/ML.pdf|Machine Language]]

===== To Do =====

  * Go over the files in the //Resource Directory//
  * Do the homework given in class (Math.min using stack frames).
  * Do the homework given in class (translation of the given Recursive.java program).
  * Read all the sections that we skipped in Chapter 2 (Chapter 3 if you have the old version).
  * Go over the lectures, the readings, and the labs in preparation for next week's test.