To find out your processor type , the way of the store data in memory (this depends on the structure of the processor,there're two way of storing data in memory,Big Endian and Little Endian) and etc. Use lscpu command.
apt install nasm
nasm -f elf64 -o <fileName>.o <fileName>.asm to create the object file.
ld -o <fileName> <fileName>.o to create the executable file.
./<fileName>
This contains a simple python3 script (syscalls.py) which list down system_calls in x86, x86_64 assembly. Default value is 32. So if you didn't parse any options it shows you only system_calls related to 32 bit architecture.