Assembly·Assembly essentials

Small function

Write a function that returns the larger of two integers.

Advanced 10 min read Lesson 5 of 150 Challenge included
What you will be able to do
  • Compare with cmp.
  • Use jge for greater or equal.
  • Return in rax.

In plain English

Write a function that returns the larger of two integers.

  • Compare with cmp.
  • Use jge for greater or equal.
  • Return in rax.
max.sASM
max:
    cmp %rsi, %rdi
    jge .done
    mov %rsi, %rdi
.done:
    mov %rdi, %rax
    ret
Your turn

Explain it back

Easy

Answer from memory: Where is an integer return value placed by the x86-64 ABI?

TEXT · starter
Your answer…
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Knowledge checkQuestion 1

Where is an integer return value placed by the x86-64 ABI?

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Lesson 5 of 150 · 0% of course