What is the size of each asm instruction?

Question

What is the size of each asm instruction? Every instruction takes how many bytes? 8 bytes? Four for the opcode and Four for the argument? What happens when you have one opco

Answer 1

The size of a machine instruction depends on the processor architecture - there are architectures with fixed size instruction, but you are obviously refering to the IA-32 and Intel 64 and they have strongly varing instruction lengths. The instruction pointer is of course always incremented by the length of the processed instruction.

You can download the IA-32 and Intel 64 manuals from Intel - they contain almost everything you can know about the architecture. You can find an opcode map and instruction set format in Intel® 64 and IA-32 Architectures Software Developer’s Manual Volume 2B: Instruction Set Reference, N-Z on pages 623 to 768.