==x86 CPU Register==
Register
{| {{Prettytable}}
! Bits  || Register
|-
| 8 || AL, BL, CL, DL, AH, BH, CH, DH
|-
| 16 || AX, BX, CX, DX, DI, SI, BP, SP, CS, DS, ES, FS, GS, SS
|-
| 32 || EAX, EBX, ECX, EDX, EDI, ESI, EBP, ESP, EIP, EFLAGS
|-
| 128 || XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7
|}

==x86-64 CPU Register==
{| {{Prettytable}}
! Bits  || Register
|-
| 8 || AL, BL, CL, DL, DIL, SIL, BPL, SPL, R8L, R9L, R10L, R11L, R12L, R13L, R14L, R15L
|-
| 16 || AX, BX, CX, DX, DI, SI, BP, SP, CS, DS, ES, FS, GS, SS, R8W, R9W, R10W, R11W, R12W, R13W, R14W, R15W
|-
| 32 || EAX, EBX, ECX, EDX, EDI, ESI, EBP, ESP, EIP, EFLAGS, R8D, R9D, R10D, R11D, R12D, R13D, R14D, R15D
|-
| 64 || RAX, RBX, RCX, RDX, RDI, RSI, RBP, RSP, RIP, RFLAGS, R8, R9, R10, R11, R12, R13, R14, R15
|-
| 128 || XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7, XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15
|}