today I learned something ;P

Wow! There really is an instruction for everything.

Love a murder kata solution

Basically,

if something results in True, it needs to be returned as "True"

if something results in False, it needs to be returned as "False"

Hope that helps

What do you need explaining?

please can someone explain

Code size optimization

What's the purpose of lea rax,[rsi+rdi]?

It's the lower 8 bits of edi (like al to eax)

hmm... :/ I use MASM I keep having to look at NASM references. wonder if they will add MASM.
I will study this DIL.