source: src/compiler.ma @ 2320

Last change on this file since 2320 was 2320, checked in by campbell, 8 years ago

Update compiler and correctness with labelling changes.

File size: 2.8 KB
Line 
1
2include "Clight/label.ma".
3include "Clight/SimplifyCasts.ma".
4(*include "Clight/switchRemoval.ma".*)
5include "Clight/toCminor.ma".
6include "Cminor/initialisation.ma".
7include "Cminor/toRTLabs.ma".
8
9definition front_end : clight_program → res (costlabel × clight_program × RTLabs_program) ≝
10λp.
11  let 〈p',init_cost〉 ≝ clight_label p in
12  let p ≝ simplify_program p' in
13(*  let p ≝ program_switch_removal p in*)
14  ! p ← clight_to_cminor p;
15  let p ≝ cminor_to_rtlabs init_cost p in
16  return 〈init_cost,p',p〉.
17
18include "RTLabs/RTLabsToRTL.ma".
19include "RTL/RTLToERTL.ma".
20include "ERTL/ERTLToLTL.ma".
21include "LTL/LTLToLIN.ma".
22include "LIN/LINToASM.ma".
23
24(* these are already defined in utilities/fixpoint.ma and ERTL/Interference.ma
25axiom the_fixpoint : fixpoint.
26axiom build : ∀valuation. coloured_graph valuation.
27*)
28definition back_end : RTLabs_program → pseudo_assembly_program ≝
29λp.
30  let p ≝ rtlabs_to_rtl p in
31  let p ≝ rtl_to_ertl p in
32  let p ≝ ertl_to_ltl p in  (* TODO: abstract over colouring *)
33  let p ≝ ltl_to_lin p in
34          lin_to_asm p.
35
36include "ASM/Assembly.ma".
37
38include "ASM/Policy.ma".
39
40axiom Jump_expansion_failed : String.
41
42include "ASM/ASMCostsSplit.ma".
43
44axiom assembler : pseudo_assembly_program → res (object_code × costlabel_map). (*
45definition assembler : pseudo_assembly_program → res (object_code × costlabel_map) ≝
46λp.
47  let 〈preamble, list_instr〉 ≝ p in
48  (* TODO: fail if p is too large. *)
49  let p' ≝ 〈preamble, list_instr〉 in
50  ! sigma_pol ← opt_to_res ? (msg Jump_expansion_failed) (jump_expansion' p');
51  let sigma ≝ λppc. \fst (sigma_pol ppc) in
52  let pol ≝ λppc. \snd (sigma_pol ppc) in
53  OK ? (assembly p sigma pol).
54cases daemon
55qed.*)
56
57include "RTLabs/semantics.ma".
58
59axiom RTLabs_abstract_status : genv → abstract_status.
60
61include "joint/Traces.ma".
62
63include "ASM/Fetch.ma". (* For load_code_memory only *)
64
65axiom in_clight_program : costlabel → Prop.
66
67definition lift_cost_map_back_to_front :
68  ∀code_memory, lbls.
69   (∀l. (∃pc.as_label_of_pc (ASM_abstract_status code_memory lbls) pc = Some … l) +
70       ¬(∃pc.as_label_of_pc (ASM_abstract_status code_memory lbls) pc = Some … l)) →
71  as_cost_map (ASM_abstract_status code_memory lbls) →
72  (Σl : costlabel.in_clight_program l) → ℕ ≝ λcode_memory,lbls,dec,k,l_sig.
73   match dec l_sig with
74   [ inl prf ⇒ k «l_sig, prf»
75   | inr _ ⇒ 0 (* labels not present in out code get 0 *)
76   ].
77
78definition compile : clight_program →
79  res (object_code × costlabel_map × clight_program × ((Σl.in_clight_program l) → ℕ)) ≝
80λp.
81  ! 〈init_cost,p',p〉 ← front_end p;
82  let p ≝ back_end p in
83    ! p ← assembler p;
84  let k ≝ ASM_cost_map p ? in
85  let k' ≝ lift_cost_map_back_to_front
86    (load_code_memory (\fst p))
87    (\snd p)
88    ? k
89    in
90  return 〈p, p', k'〉.
91  cases daemon
92  qed.
93
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