source: src/LIN/joint_LTL_LIN_semantics.ma @ 3014

Last change on this file since 3014 was 3014, checked in by tranquil, 7 years ago

ERTL to ERTLptr pass suppressed (it introduced a bug in the later ERTLptr to LTL), and integrated in a single ERTToLTL pass like before

File size: 3.9 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
37definition LTL_LIN_save_frame :
38call_kind → unit → state_pc LTL_LIN_state → res(state LTL_LIN_state) ≝
39λk.λ_.λst. match k with
40[ PTR ⇒ return (st_no_pc … st)
41| ID ⇒ push_ra … st (pc … st)
42].
43
44definition eval_LTL_LIN_ext_seq :
45 ∀F.∀globals.∀ge : genv_gen F globals.ltl_lin_seq → ident → state LTL_LIN_state → res (state LTL_LIN_state) ≝
46λF,globals,ge,s,curr_id,st.
47match s with
48[ SAVE_CARRY ⇒
49  let regs ≝ hwreg_set_other … (carry … st) (regs … st) in
50  return set_regs LTL_LIN_state regs st
51| RESTORE_CARRY ⇒
52  let carry ≝ other_bit (regs … st) in
53  return set_carry LTL_LIN_state carry st
54| LOW_ADDRESS l ⇒  ! pc_lab ← gen_pc_from_label … ge curr_id l;
55                    let 〈addrl,addrh〉 ≝ beval_pair_of_pc pc_lab in
56                    let regs ≝ hwreg_store RegisterA addrl (regs … st) in
57                    return set_regs LTL_LIN_state regs st
58| HIGH_ADDRESS l ⇒ ! pc_lab ← gen_pc_from_label … ge curr_id l;
59                    let 〈addrl,addrh〉 ≝  beval_pair_of_pc pc_lab in
60                    let regs ≝ hwreg_store RegisterA addrh (regs … st) in
61                    return set_regs LTL_LIN_state regs st
62].
63
64definition LTL_LIN_semantics ≝
65  λF.mk_sem_unserialized_params LTL_LIN F
66  (* st_pars            ≝ *) LTL_LIN_state
67  (* acca_store_        ≝ *) (λ_.hw_reg_store RegisterA)
68  (* acca_retrieve_     ≝ *) (λe.λ_.hw_reg_retrieve e RegisterA)
69  (* acca_arg_retrieve_ ≝ *) (λe.λ_.hw_reg_retrieve e RegisterA)
70  (* accb_store_        ≝ *) (λ_.hw_reg_store RegisterB)
71  (* accb_retrieve_     ≝ *) (λe.λ_.hw_reg_retrieve e RegisterB)
72  (* accb_arg_retrieve_ ≝ *) (λe.λ_.hw_reg_retrieve e RegisterB)
73  (* dpl_store_         ≝ *) (λ_.hw_reg_store RegisterDPL)
74  (* dpl_retrieve_      ≝ *) (λe.λ_.hw_reg_retrieve e RegisterDPL)
75  (* dpl_arg_retrieve_  ≝ *) (λe.λ_.hw_reg_retrieve e RegisterDPL)
76  (* dph_store_         ≝ *) (λ_.hw_reg_store RegisterDPH)
77  (* dph_retrieve_      ≝ *) (λe.λ_.hw_reg_retrieve e RegisterDPH)
78  (* dph_arg_retrieve_  ≝ *) (λe.λ_.hw_reg_retrieve e RegisterDPH)
79  (* snd_arg_retrieve_  ≝ *) hw_arg_retrieve
80  (* pair_reg_move_     ≝ *) eval_registers_move
81(*  (* fetch_ra           ≝ *) (load_ra …)
82  (* allocate_local     ≝ *) (λabs.match abs in void with [ ])
83*)  (* save_frame         ≝ *) LTL_LIN_save_frame
84  (* setup_call         ≝ *) (λ_.λ_.λ_.λst.return st)
85  (* fetch_external_args≝ *) ltl_lin_fetch_external_args
86  (* set_result         ≝ *) ltl_lin_set_result
87  (* call_args_for_main ≝ *) 0
88  (* call_dest_for_main ≝ *) it
89  (* read_result        ≝ *) (λ_.λ_.λ_.
90  λst.return map … (hwreg_retrieve (regs … st)) RegisterRets)
91  (* eval_ext_seq       ≝ *) (eval_LTL_LIN_ext_seq ?)
92  (* pop_frame          ≝ *) ((λ_.λ_.λ_.λ_.λst.pop_ra … st)).
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