CS208 Introduction to Computer Systems
Friday, 20 Jan 2023

+ Monday exam
- Show up in Olin 304/306/308
- Paper
- Closed-everything except your brain
- I have the graded bits assignment
    and will get it back to you this morning
- I will send the exam to OAR this morning

+ Questions?

+ x86_64: let's start again
- Compiler Explorer (vs. gcc + objdump -d)
    https://godbolt.org/

- Example 1: puzzle0 (absolute value) redone
    input parameter in which register?
    change input parameter from int to long
    return value?
    change return type from int to long
    walk through the code

    how to read the instruction docs
    - description
    - flags affected