Chapter 3, Problem 3.68HW

Explanation of Solution

Given assembly code:

setVal:

movslq 8(%rsi), %rax

addq 32(%rsi), %rax

movq %rax, 184(%rdi)

ret

Explanation:

• The register “%rdi” and “%rsi” has values for “p” and “q” respectively.
• The instruction “movslq 8(%rsi), %rax” fetches “q->t” and “t” is aligned by 4.
  • The condition for “B” is “$4<B<=8$”.
• The instruction “addq 32(%rsi), %rax” fetches “q->u” and “u” is aligned by 8.
  • The condition for “A” is “$24<12+A*2<=32$”.
• The instruction “movq %rax, 184(%rdi)” fetches “p->v” and “y” is aligned by 8.
  • The condition for “A” and “B” is “$176<A*B*4<=184$”.
• The instruction “ret” denotes a return statement