32-bit and 64-bit Architecture
x86
x86 is a family of CISC instruction set architectures initially developed by Intel.
Usually, we work with 64-bit architecture, so it is called x86-64 / AMD64.
ARM vs x86
The key difference is that ARM works in RISC, while x86 architecture works in CISC. StackOverflow.
x86-64 / AMD64
x86-64 and AMD64 are used interchangeably.
x86-64 means the 64-bit version of the x86 instruction set.
General-Purpose Registers
From https://wiki.cdot.senecacollege.ca/wiki/X86_64_Register_and_Instruction_Quick_Start.
The 64-bit versions of the āoriginalā x86 registers are named:
- rax - register a extended
- rbx - register b extended
- rcx - register c extended
- rdx - register d extended
- rbp - register base pointer (start of stack)
- rsp - register stack pointer (current location in stack, growing downwards)
- rsi - register source index (source for data copies)
- rdi - register destination index (destination for data copies)