include "LIN/joint_LTL_LIN.ma".
include "joint/SemanticUtils.ma".

definition hw_reg_store ≝ λr,v,e. OK … (hwreg_store r v e).
definition hw_reg_retrieve ≝ λl,r. OK … (hwreg_retrieve l r).

definition ltl_lin_more_sem_params: ∀succT. more_sem_params (mk_params_ ltl_lin_params__ succT) :=
 λsuccT.
 mk_more_sem_params ?
  unit it hw_register_env init_hw_register_env 0 it
   hw_reg_store hw_reg_retrieve (λ_.hw_reg_store RegisterA) (λe.λ_.hw_reg_retrieve e RegisterA)
    (λ_.hw_reg_store RegisterB) (λe.λ_.hw_reg_retrieve e RegisterB)
    (λ_.hw_reg_store RegisterDPL) (λe.λ_.hw_reg_retrieve e RegisterDPL)
    (λ_.hw_reg_store RegisterDPH) (λe.λ_.hw_reg_retrieve e RegisterDPH)
     (λlocals,dest_src.
       match dest_src with
       [ from_acc reg ⇒
          do v ← hw_reg_retrieve locals RegisterA ;
          hw_reg_store reg v locals
       | to_acc reg ⇒
          do v ← hw_reg_retrieve locals reg ;
          hw_reg_store RegisterA v locals ]).

definition ltl_lin_sem_params: ∀succT. sem_params ≝
 λsuccT.mk_sem_params … (ltl_lin_more_sem_params succT).


definition ltl_lin_init_locals : unit → hw_register_env → hw_register_env ≝ λ_.λe.e.
definition ltl_lin_pop_frame:
 ∀succT,codeT,lookup.
 ∀globals. genv globals (mk_params globals succT ltl_lin_params1 (codeT globals) (lookup globals)) →
 state … (ltl_lin_sem_params succT) → res (state … (ltl_lin_sem_params …)) ≝
 λ_.λ_.λ_.λ_.λ_.λt.OK … t.
definition ltl_lin_save_frame:
 ∀succT. address → nat → unit → nat → unit → state … (ltl_lin_sem_params succT) → res (state … (ltl_lin_sem_params …)) ≝
 λ_.λl.λ_.λ_.λ_.λ_.λst.save_ra … st l.

(* The following implementation only works for functions that return 32 bits *)
definition ltl_lin_result_regs:
 ∀succT,codeT,lookup.
 ∀globals. genv globals (mk_params globals succT ltl_lin_params1 (codeT globals) (lookup globals)) →
 state (ltl_lin_sem_params succT) → res (list Register) ≝
 λ_.λ_.λ_.λ_.λ_.λ_. OK … RegisterRets.

(*CSC: XXXX, for external functions only*)
axiom ltl_lin_fetch_external_args: ∀succT.external_function → state (ltl_lin_sem_params succT) → res (list val).
axiom ltl_lin_set_result: ∀succT.list val → state (ltl_lin_sem_params succT) → res (state (ltl_lin_sem_params succT)).

definition ltl_lin_exec_extended: ∀succT.∀p.∀globals. genv globals (p globals) → False → succT → state (ltl_lin_sem_params succT) → IO io_out io_in (trace × (state (ltl_lin_sem_params succT)))
 ≝ λsuccT,p,globals,ge,abs. ⊥.
@abs qed.

definition ltl_lin_more_sem_params2:
 ∀succT,codeT,lookup.∀succ: succT → address → res address.∀fetch.
 ∀pointer_of_label: ∀globals. genv globals
  (mk_params globals succT ltl_lin_params1 (codeT globals) (lookup globals))
  →pointer→label→res (Σp0:pointer.ptype p0=Code).
 ∀globals. more_sem_params2 … (mk_params globals succT ltl_lin_params1 (codeT globals) (lookup globals)) ≝
 λsuccT,codeT,lookup,succ,fetch,pointer_of_label,globals.
  mk_more_sem_params2 …
   (mk_more_sem_params1 … (ltl_lin_more_sem_params …)
    succ (pointer_of_label …) (fetch globals) (load_ra …) (ltl_lin_result_regs …)
    ltl_lin_init_locals (ltl_lin_save_frame …) (ltl_lin_pop_frame …)
    (ltl_lin_fetch_external_args …) (ltl_lin_set_result …)) (ltl_lin_exec_extended …).

definition ltl_lin_fullexec ≝
 λsuccT,codeT,lookup,succ,fetch,pointer_of_label.
  joint_fullexec … (λp. ltl_lin_more_sem_params2 succT codeT lookup succ fetch pointer_of_label (prog_var_names … p)).