How to understand the comment of macro *compute_indices*?

Hello, Macro *compute_indices* in arch/arm64/kernel/head.S have a comment as shown below: mov \istart, \ptrs mul \istart, \istart, \count add \iend, \iend, \istart // iend += (count - 1) * ptrs I am wondering whether this comment should be change to "iend += count * ptrs". Or am I misunderstanding this code? Thanks -Lio