CS208 Introduction to Computer Systems
Friday, 6 February 2026

+ Questions

+ What's going on with...
- puzzle2: pushq rbx, popq rbx
    (similar in puzzle4)
- puzzle3: testq, sete, testq, sete, orb, je
- puzzle4: subq $8, %rsp ... addq $8, %rsp
- puzzle5: leal (%rcx,%rax), %esi
- puzzle6:
    - movslq %edx, %rax
      salq $2, %rax
      movl -4(%rdi,%rax), %ecx
    - all those jumps
    - movl %r8d, (%rdi,%rdx,4)
- puzzle7: WTH??