source: src/LIN/joint_LTL_LIN_semantics.ma @ 2956

Last change on this file since 2956 was 2956, checked in by tranquil, 8 years ago

fixed LTL/LIN semantics

File size: 4.1 KB
Line 
1include "LIN/joint_LTL_LIN.ma".
2include "joint/semanticsUtils.ma".
3
4definition hw_reg_store ≝ λr,v,e. OK … (hwreg_store r v e).
5definition hw_reg_retrieve ≝ λl,r. OK … (hwreg_retrieve l r).
6definition hw_arg_retrieve ≝
7  λl,a.match a with
8  [ Reg r ⇒ hw_reg_retrieve l r
9  | Imm b ⇒ OK … (BVByte b)
10  ].
11
12definition eval_registers_move ≝ λe,m.
13match m with
14[ from_acc r _ ⇒
15  hw_reg_store r (hwreg_retrieve e RegisterA) e
16| to_acc _ r ⇒
17  hw_reg_store RegisterA (hwreg_retrieve e r) e
18| int_to_reg r v ⇒
19  hw_reg_store r (BVByte v) e
20| int_to_acc _ v ⇒
21  hw_reg_store RegisterA (BVByte v) e
22].
23
24definition LTL_LIN_state : sem_state_params ≝
25  mk_sem_state_params
26 (* framesT ≝ *) unit
27 (* empty_framesT ≝ *) it
28 (* regsT ≝ *) hw_register_env
29 (* empty_regsT ≝ *) init_hw_register_env
30 (* load_sp ≝ *) hwreg_retrieve_sp
31 (* store_sp ≝ *) hwreg_store_sp.
32
33(*CSC: XXXX, for external functions only*)
34axiom ltl_lin_fetch_external_args: external_function → state LTL_LIN_state → ℕ → res (list val).
35axiom ltl_lin_set_result: list val → unit → state LTL_LIN_state → res (state LTL_LIN_state).
36
37(* TODO (needs another bit to be added to hdw) *)
38axiom eval_ltl_lin_seq : ltl_lin_seq → state LTL_LIN_state → IO io_out io_in (state LTL_LIN_state).
39
40definition LTL_LIN_save_frame :
41call_kind → unit → state_pc LTL_LIN_state → res(state LTL_LIN_state) ≝
42λk.λ_.λst. match k with
43[ PTR ⇒ return (st_no_pc … st)
44| ID ⇒ push_ra … st (pc … st)
45].
46
47definition eval_LTL_LIN_ext_seq :
48 ∀F.∀globals.∀ge : genv_gen F globals.ltl_lin_seq → ident → state LTL_LIN_state → res (state LTL_LIN_state) ≝
49λF,globals,ge,s,curr_id,st.
50match s with
51[ SAVE_CARRY ⇒
52  let regs ≝ hwreg_set_other … (carry … st) (regs … st) in
53  return set_regs LTL_LIN_state regs st
54| RESTORE_CARRY ⇒
55  let carry ≝ other_bit (regs … st) in
56  return set_carry LTL_LIN_state carry st
57| LOW_ADDRESS r l ⇒  ! pc_lab ← gen_pc_from_label … ge curr_id l;
58                    let 〈addrl,addrh〉 ≝ beval_pair_of_pc pc_lab in
59                    let regs ≝ hwreg_store r addrl (regs … st) in
60                    return set_regs LTL_LIN_state regs st
61| HIGH_ADDRESS r l ⇒ ! pc_lab ← gen_pc_from_label … ge curr_id l;
62                    let 〈addrl,addrh〉 ≝  beval_pair_of_pc pc_lab in
63                    let regs ≝ hwreg_store r addrh (regs … st) in
64                    return set_regs LTL_LIN_state regs st
65].
66
67definition LTL_LIN_semantics ≝
68  λF.mk_sem_unserialized_params LTL_LIN F
69  (* st_pars            ≝ *) LTL_LIN_state
70  (* acca_store_        ≝ *) (λ_.hw_reg_store RegisterA)
71  (* acca_retrieve_     ≝ *) (λe.λ_.hw_reg_retrieve e RegisterA)
72  (* acca_arg_retrieve_ ≝ *) (λe.λ_.hw_reg_retrieve e RegisterA)
73  (* accb_store_        ≝ *) (λ_.hw_reg_store RegisterB)
74  (* accb_retrieve_     ≝ *) (λe.λ_.hw_reg_retrieve e RegisterB)
75  (* accb_arg_retrieve_ ≝ *) (λe.λ_.hw_reg_retrieve e RegisterB)
76  (* dpl_store_         ≝ *) (λ_.hw_reg_store RegisterDPL)
77  (* dpl_retrieve_      ≝ *) (λe.λ_.hw_reg_retrieve e RegisterDPL)
78  (* dpl_arg_retrieve_  ≝ *) (λe.λ_.hw_reg_retrieve e RegisterDPL)
79  (* dph_store_         ≝ *) (λ_.hw_reg_store RegisterDPH)
80  (* dph_retrieve_      ≝ *) (λe.λ_.hw_reg_retrieve e RegisterDPH)
81  (* dph_arg_retrieve_  ≝ *) (λe.λ_.hw_reg_retrieve e RegisterDPH)
82  (* snd_arg_retrieve_  ≝ *) hw_arg_retrieve
83  (* pair_reg_move_     ≝ *) eval_registers_move
84(*  (* fetch_ra           ≝ *) (load_ra …)
85  (* allocate_local     ≝ *) (λabs.match abs in void with [ ])
86*)  (* save_frame         ≝ *) LTL_LIN_save_frame
87  (* setup_call         ≝ *) (λ_.λ_.λ_.λst.return st)
88  (* fetch_external_args≝ *) ltl_lin_fetch_external_args
89  (* set_result         ≝ *) ltl_lin_set_result
90  (* call_args_for_main ≝ *) 0
91  (* call_dest_for_main ≝ *) it
92  (* read_result        ≝ *) (λ_.λ_.λ_.
93  λst.return map … (hwreg_retrieve (regs … st)) RegisterRets)
94  (* eval_ext_seq       ≝ *) (eval_LTL_LIN_ext_seq ?)
95  (* pop_frame          ≝ *) ((λ_.λ_.λ_.λ_.λst.pop_ra … st)).
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