CS208 Introduction to Computer Systems
Wednesday, 1 Feb 2023

+ Assembly language questions
- What is a register?
- What is the difference between rax, eax, ax, ah, and al?
- Describe one "conventional use" of a register? (we have briefly discussed
    conventional uses rdi, rsi, and rax so far)
- What does the MOV instruction do?
- What is the difference between MOVQ, MOVL, MOVW, and MOVB
- The EFLAGS register contains a bunch of bits that are manipulated by
    various instructions. What are the meanings of the bits SF and ZF?
- When you do "MOVQ %rax, %rbx", what happens (if anything) to SF and ZF?
- What do the following instructions do?

    ADD x, y
    SUB x, y
    TEST x, y
    CMP x, y
    JMP x

- Don't know the answers to the above? How could you find out?
 

+ Exercises: see today's LAB


+ gdb walkthrough