Definition all_mregs :=
    R5 :: R6 :: R7 :: R8 :: R9 :: R10 :: R11 :: R12 :: R13 :: R14 :: R15
 :: R16 :: R17 :: R18 :: R19 :: R20 :: R21 :: R22 :: R23
 :: R24 :: R25 :: R26 :: R27 :: R28 :: R29 :: R30
 :: F0 :: F1 :: F2 :: F3 :: F4 :: F5 :: F6 :: F7
 :: F8 :: F9 :: F10 :: F11 :: F12 :: F13 :: F14 :: F15
 :: F16 :: F17 :: F18 :: F19 :: F20 :: F21 :: F22 :: F23
 :: F24 :: F25 :: F26 :: F27 :: F28 :: F29 :: F30 :: F31
 :: nil.

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