Common registers:
- AL/AH/AX/EAX/RAX: Accumulator
- CL/CH/CX/ECX/RCX: Counter (for use with loops and strings)
- DL/DH/DX/EDX/RDX: Extend the precision of the accumulator (e.g. combine 32-bit EAX and EDX for 64-bit integer operations in 32-bit code)
- BL/BH/BX/EBX/RBX: Base index (for use with arrays)
- SP/ESP/RSP: Stack pointer for top address of the stack.
- BP/EBP/RBP: Stack base pointer for holding the address of the current stack frame.
- SI/ESI/RSI: Source index for string operations.
- DI/EDI/RDI: Destination index for string operations.
- IP/EIP/RIP: Instruction pointer. Holds the program counter, the address of next instruction.
Segment registers:
- CS: Code
- DS: Data
- SS: Stack
- ES: Extra data
- FS: Extra data #2
- GS: Extra data #3
源自: https://en.wikipedia.org/wiki/X86#x86_registers
