Project

General

Profile

Statistics
| Branch: | Tag: | Revision:

lustrec / src / backends / Ada / ada_backend_adb.ml @ 173a2a8f

History | View | Annotate | Download (8.58 KB)

1
(********************************************************************)
2
(*                                                                  *)
3
(*  The LustreC compiler toolset   /  The LustreC Development Team  *)
4
(*  Copyright 2012 -    --   ONERA - CNRS - INPT - ISAE-SUPAERO     *)
5
(*                                                                  *)
6
(*  LustreC is free software, distributed WITHOUT ANY WARRANTY      *)
7
(*  under the terms of the GNU Lesser General Public License        *)
8
(*  version 2.1.                                                    *)
9
(*                                                                  *)
10
(********************************************************************)
11

    
12
open Format
13

    
14
open Machine_code_types
15
open Lustre_types
16
open Corelang
17
open Machine_code_common
18

    
19
open Misc_printer
20
open Misc_lustre_function
21
open Ada_printer
22
open Ada_backend_common
23

    
24
(** Main module for generating packages bodies
25
 **)
26
module Main =
27
struct
28

    
29
  (** Printing function for basic assignement [var := value].
30

    
31
      @param fmt the formater to print on
32
      @param var_name the name of the variable
33
      @param value the value to be assigned
34
   **)
35
  let pp_assign env fmt var value =
36
    fprintf fmt "%a := %a"
37
      (pp_var env) var
38
      (pp_value env) value
39

    
40
  (** Printing function for instruction. See
41
      {!type:Machine_code_types.instr_t} for more details on
42
      machine types.
43

    
44
      @param typed_submachines list of all typed machine instances of this machine
45
      @param machine the current machine
46
      @param fmt the formater to print on
47
      @param instr the instruction to print
48
   **)
49
  let rec pp_machine_instr typed_submachines env instr fmt =
50
    let pp_instr = pp_machine_instr typed_submachines env in
51
    (* Print args for a step call *)
52
    let pp_state i fmt = fprintf fmt "%t.%s" pp_state_name i in
53
    (* Print a when branch of a case *)
54
    let pp_when (cond, instrs) fmt =
55
      fprintf fmt "when %s =>@,%a" cond pp_block (List.map pp_instr instrs)
56
    in
57
    (* Print a case *)
58
    let pp_case fmt (g, hl) =
59
      fprintf fmt "case %a is@,%aend case"
60
        (pp_value env) g
61
        pp_block (List.map pp_when hl)
62
    in
63
    (* Print a if *)
64
    (* If neg is true the we must test for the negation of the condition. It
65
       first check that we don't have a negation and a else case, if so it
66
       inverses the two branch and remove the negation doing a recursive
67
       call. *)
68
    let pp_if fmt (neg, g, instrs1, instrs2) =
69
      let pp_cond =
70
        if neg then
71
          fun fmt x -> fprintf fmt "! (%a)" (pp_value env) x
72
        else
73
          pp_value env
74
      in
75
      let pp_else = match instrs2 with
76
        | None -> fun fmt -> fprintf fmt ""
77
        | Some i2 -> fun fmt ->
78
            fprintf fmt "else@,%a" pp_block (List.map pp_instr i2)
79
      in
80
      fprintf fmt "if %a then@,%a%tend if"
81
        pp_cond g
82
        pp_block (List.map pp_instr instrs1)
83
        pp_else
84
    in
85
    match get_instr_desc instr with
86
      (* no reset *)
87
      | MNoReset _ -> ()
88
      (* reset  *)
89
      | MReset i when List.mem_assoc i typed_submachines ->
90
          let (substitution, submachine) = get_instance i typed_submachines in
91
          let pp_package = pp_package_name_with_polymorphic substitution submachine in
92
          let args = if is_machine_statefull submachine then [[pp_state i]] else [] in
93
          pp_call fmt (pp_package_access (pp_package, pp_reset_procedure_name), args)
94
      | MLocalAssign (ident, value) ->
95
          pp_assign env fmt ident value
96
      | MStateAssign (ident, value) ->
97
          pp_assign env fmt ident value
98
      | MStep ([i0], i, vl) when is_builtin_fun i ->
99
          let value = mk_val (Fun (i, vl)) i0.var_type in
100
            pp_assign env fmt i0 value
101
      | MStep (il, i, vl) when List.mem_assoc i typed_submachines ->
102
          let (substitution, submachine) = get_instance i typed_submachines in
103
          let pp_package = pp_package_name_with_polymorphic substitution submachine in
104
          let input = List.map (fun x fmt -> pp_value env fmt x) vl in
105
          let output = List.map pp_var_name il in
106
          let args =
107
            (if is_machine_statefull submachine then [[pp_state i]] else [])
108
              @(if input!=[] then [input] else [])
109
              @(if output!=[] then [output] else [])
110
          in
111
          pp_call fmt (pp_package_access (pp_package, pp_step_procedure_name), args)
112
      | MBranch (_, []) -> assert false
113
      | MBranch (g, (c1, i1)::tl) when c1=tag_false || c1=tag_true ->
114
          pp_if fmt (build_if g c1 i1 tl)
115
      | MBranch (g, hl) -> pp_case fmt (g, hl)
116
      | MComment s  ->
117
          let lines = String.split_on_char '\n' s in
118
          fprintf fmt "%a" (Utils.fprintf_list ~sep:"" pp_oneline_comment) lines
119
      | _ -> assert false
120

    
121
  (** Print the definition of the step procedure from a machine.
122

    
123
     @param typed_submachines list of all typed machine instances of this machine
124
     @param fmt the formater to print on
125
     @param machine the machine
126
  **)
127
  let pp_step_definition env typed_submachines fmt (m, m_spec_opt, guarantees) =
128
    let transform_local_to_state_assign instr = match instr.instr_desc with
129
      | MLocalAssign (ident, value) -> 
130
          { instr_desc = MStateAssign (ident, value);
131
            lustre_eq= instr.lustre_eq }
132
      | x -> instr
133
    in
134
    let pp_local_ghost_list, spec_instrs = match m_spec_opt with
135
      | None -> [], []
136
      | Some m_spec ->
137
          List.map (build_pp_var_decl_local (Some (true, [], []))) (List.filter (fun x -> not (List.mem x.var_id guarantees)) m_spec.mstep.step_locals),
138
          List.map transform_local_to_state_assign m_spec.mstep.step_instrs
139
    in
140
    let pp_local_list = List.map (build_pp_var_decl_local None) (m.mstep.step_locals) in
141
    let pp_instr_list = List.map (pp_machine_instr typed_submachines env) (m.mstep.step_instrs@spec_instrs) in
142
    let content = AdaProcedureContent ((if pp_local_ghost_list = [] then [] else [pp_local_ghost_list])@(if pp_local_list = [] then [] else [pp_local_list]), pp_instr_list) in
143
    pp_procedure pp_step_procedure_name (build_pp_arg_step m) None fmt content
144

    
145
  (** Print the definition of the reset procedure from a machine.
146

    
147
     @param typed_submachines list of all typed machine instances of this machine
148
     @param fmt the formater to print on
149
     @param machine the machine
150
  **)
151
  let pp_reset_definition env typed_submachines fmt (m, m_spec_opt) =
152
    let build_assign = function var ->
153
      mkinstr (MStateAssign (var, mk_default_value var.var_type))
154
    in
155
    let env, memory = match m_spec_opt with
156
      | None -> env, m.mmemory
157
      | Some m_spec ->
158
          env,
159
          (m.mmemory)
160
    in
161
    let assigns = List.map build_assign memory in
162
    let pp_instr_list = List.map (pp_machine_instr typed_submachines env) (assigns@m.minit) in
163
    pp_procedure pp_reset_procedure_name (build_pp_arg_reset m) None fmt (AdaProcedureContent ([], pp_instr_list))
164

    
165
  (** Print the package definition(ads) of a machine.
166
    It requires the list of all typed instance.
167
    A typed submachine instance is (ident, type_machine) with ident
168
    the instance name and typed_machine is (substitution, machine) with machine
169
    the machine associated to the instance and substitution the instanciation of
170
    all its polymorphic types.
171
     @param fmt the formater to print on
172
     @param typed_submachines list of all typed machine instances of this machine
173
     @param m the machine
174
  **)
175
  let pp_file fmt (typed_submachines, ((opt_spec_machine, guarantees, past_size), machine)) =
176
    let env = List.map (fun x -> x.var_id, pp_state_name) machine.mmemory in
177
    let pp_reset fmt =
178
      if is_machine_statefull machine then
179
        fprintf fmt "%a;@,@," (pp_reset_definition env typed_submachines) (machine, opt_spec_machine)
180
      else
181
        fprintf fmt ""
182
    in
183
    let aux pkgs (id, _) =
184
      try
185
        let (pkg, _) = List.assoc id ada_supported_funs in
186
        if List.mem pkg pkgs then
187
          pkgs
188
        else
189
          pkg::pkgs
190
      with Not_found -> pkgs
191
    in
192
    let packages = List.map pp_str (List.fold_left aux [] machine.mcalls) in
193
    let pp_content fmt =
194
      fprintf fmt "%t%a"
195
        (*Define the reset procedure*)
196
        pp_reset
197
        
198
        (*Define the step procedure*)
199
        (pp_step_definition env typed_submachines) (machine, opt_spec_machine, guarantees)
200
    in
201
    fprintf fmt "%a%t%a;@."
202
      
203
      (* Include all the required packages*)
204
      (Utils.fprintf_list ~sep:";@," (pp_with AdaPrivate)) packages
205
      (Utils.pp_final_char_if_non_empty ";@,@," packages)
206
      
207
      (*Print package*)
208
      (pp_package (pp_package_name machine) [] true ) pp_content
209

    
210
end
211

    
212
(* Local Variables: *)
213
(* compile-command: "make -C ../../.." *)
214
(* End: *)