Re: Question about AMD64 ABI

From: Daniel Cervus <DanieltheDeer_at_outlook.com>
Date: Tue, 15 Nov 2022 03:30:53 UTC 
Um... let me get my thoughts clear.
I have already known when instructions can clear higher 32 bits for me.

/When passing integers to functions written by others, always pass 64-bit ones, if they are shorter, pad them by ZEROs (no matter automatically or manually), if not doing so, it is NOT safe./

This should be what you mean!
Sorry for taking up so much of your time, thank you for your patience.

Yours,
Daniel