Definition all_mregs :=
     AX :: BX :: CX :: DX :: SI :: DI :: BP
  :: R8 :: R9 :: R10 :: R11 :: R12 :: R13 :: R14 :: R15
  :: X0 :: X1 :: X2 :: X3 :: X4 :: X5 :: X6 :: X7
  :: X8 :: X9 :: X10 :: X11 :: X12 :: X13 :: X14 :: X15
  :: FP0 :: nil.

Lemma all_mregs_complete: forall (r: mreg), In r all_mregs.