aboutsummaryrefslogtreecommitdiffstats
path: root/src/vhdl/translate/trans-chap1.adb
blob: d3f3be69b111dc826b0da34c7ddd05242375b223 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
--  Iir to ortho translator.
--  Copyright (C) 2002 - 2014 Tristan Gingold
--
--  GHDL is free software; you can redistribute it and/or modify it under
--  the terms of the GNU General Public License as published by the Free
--  Software Foundation; either version 2, or (at your option) any later
--  version.
--
--  GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
--  WARRANTY; without even the implied warranty of MERCHANTABILITY or
--  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
--  for more details.
--
--  You should have received a copy of the GNU General Public License
--  along with GCC; see the file COPYING.  If not, write to the Free
--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
--  02111-1307, USA.
with Errorout; use Errorout;
with Iirs_Utils; use Iirs_Utils;
with Translation; use Translation;
with Trans.Chap2;
with Trans.Chap3;
with Trans.Chap4;
with Trans.Chap5;
with Trans.Chap6;
with Trans.Chap7;
with Trans.Chap9;
with Trans.Rtis;
with Trans.Helpers2; use Trans.Helpers2;
with Name_Table;

package body Trans.Chap1 is
   use Trans.Helpers;

   procedure Start_Block_Decl (Blk : Iir)
   is
      Info : constant Block_Info_Acc := Get_Info (Blk);
   begin
      Chap2.Declare_Inst_Type_And_Ptr
        (Info.Block_Scope'Access, Info.Block_Decls_Ptr_Type);
   end Start_Block_Decl;

   procedure Translate_Entity_Init_Generics (Entity : Iir)
   is
      El : Iir;
   begin
      Push_Local_Factory;

      El := Get_Generic_Chain (Entity);
      while El /= Null_Iir loop
         Open_Temp;

         declare
            Val : constant Iir := Get_Default_Value (El);
            El_Type : constant Iir := Get_Type (El);
         begin
            if Val = Null_Iir
              and then Get_Kind (El_Type) in Iir_Kinds_Array_Type_Definition
              and then Get_Constraint_State (El_Type) /= Fully_Constrained
            then
               --  Do not initialize unconstrained array.  They will have
               --  to be overriden by user.
               null;
            else
               Chap4.Elab_Object_Value (El, Val);
            end if;
         end;
         Close_Temp;
         El := Get_Chain (El);
      end loop;

      Pop_Local_Factory;
   end Translate_Entity_Init_Generics;

   procedure Translate_Entity_Init_Ports (Entity : Iir)
   is
      El      : Iir;
      El_Type : Iir;
      Default : Iir;
   begin
      Push_Local_Factory;

      Default := Null_Iir;
      El := Get_Port_Chain (Entity);
      while El /= Null_Iir loop
         Open_Temp;
         El_Type := Get_Type (El);
         if not Is_Fully_Constrained_Type (El_Type) then
            if Default = Null_Iir then
               Default := Create_Iir (Iir_Kind_Association_Element_Open);
            end if;
            Chap5.Elab_Unconstrained_Port_Bounds (El, Default);
         end if;
         Chap4.Elab_Signal_Declaration_Storage (El, False);
         Chap4.Elab_Signal_Declaration_Object (El, Entity, False);
         Close_Temp;

         El := Get_Chain (El);
      end loop;

      Pop_Local_Factory;
   end Translate_Entity_Init_Ports;

   procedure Translate_Entity_Declaration (Entity : Iir_Entity_Declaration)
   is
      Info                 : Block_Info_Acc;
      Interface_List       : O_Inter_List;
      type Subprg_Instance_Array is
        array (Elab_Kind) of Subprgs.Subprg_Instance_Type;
      Instance             : Subprg_Instance_Array;
      Prev_Subprg_Instance : Subprgs.Subprg_Instance_Stack;
   begin
      Info := Add_Info (Entity, Kind_Block);
      Start_Block_Decl (Entity);
      Push_Instance_Factory (Info.Block_Scope'Access);

      --  Entity link (RTI and pointer to parent).
      Info.Block_Link_Field := Add_Instance_Factory_Field
        (Wki_Rti, Rtis.Ghdl_Entity_Link_Type);

      --  generics, ports.
      Chap4.Translate_Generic_Chain (Entity);
      Chap4.Translate_Port_Chain (Entity);

      Chap9.Translate_Block_Declarations (Entity, Entity);

      Pop_Instance_Factory (Info.Block_Scope'Access);

      Subprgs.Push_Subprg_Instance (Info.Block_Scope'Access,
                                    Info.Block_Decls_Ptr_Type,
                                    Wki_Instance,
                                    Prev_Subprg_Instance);

      --  Entity elaborator.
      for K in Elab_Kind loop
         Start_Procedure_Decl
           (Interface_List, Create_Elab_Identifier (K), Global_Storage);
         Subprgs.Add_Subprg_Instance_Interfaces (Interface_List, Instance (K));
         Finish_Subprogram_Decl (Interface_List, Info.Block_Elab_Subprg (K));
      end loop;

      --  Entity dependences elaborator.
      Start_Procedure_Decl (Interface_List, Create_Identifier ("PKG_ELAB"),
                            Global_Storage);
      Finish_Subprogram_Decl (Interface_List, Info.Block_Elab_Pkg_Subprg);

      --  Generate RTI.
      if Flag_Rti then
         Rtis.Generate_Unit (Entity);
      end if;

      if Global_Storage = O_Storage_External then
         --  Entity declaration subprograms.
         Chap4.Translate_Declaration_Chain_Subprograms (Entity);
      else
         --  Entity declaration and process subprograms.
         Chap9.Translate_Block_Subprograms (Entity, Entity);

         --  Package elaborator Body.
         Start_Subprogram_Body (Info.Block_Elab_Pkg_Subprg);
         Push_Local_Factory;
         New_Debug_Line_Stmt (Get_Line_Number (Entity));
         Chap2.Elab_Dependence (Get_Design_Unit (Entity));
         Pop_Local_Factory;
         Finish_Subprogram_Body;

         --  Elaborator Body.
         for K in Elab_Kind loop
            Start_Subprogram_Body (Info.Block_Elab_Subprg (K));
            Push_Local_Factory;
            Subprgs.Start_Subprg_Instance_Use (Instance (K));
            New_Debug_Line_Stmt (Get_Line_Number (Entity));

            case K is
               when Elab_Decls =>
                  Chap9.Elab_Block_Declarations (Entity, Entity);
               when Elab_Stmts =>
                  Chap9.Elab_Block_Statements (Entity, Entity);
            end case;
            Subprgs.Finish_Subprg_Instance_Use (Instance (K));
            Pop_Local_Factory;
            Finish_Subprogram_Body;
         end loop;
      end if;
      Subprgs.Pop_Subprg_Instance (Wki_Instance, Prev_Subprg_Instance);
   end Translate_Entity_Declaration;

   --  Push scope for architecture ARCH via INSTANCE, and for its
   --  entity via the entity field of the instance.
   procedure Push_Architecture_Scope (Arch : Iir; Instance : O_Dnode)
   is
      Arch_Info   : constant Block_Info_Acc := Get_Info (Arch);
      Entity      : constant Iir := Get_Entity (Arch);
      Entity_Info : constant Block_Info_Acc := Get_Info (Entity);
   begin
      Set_Scope_Via_Param_Ptr (Arch_Info.Block_Scope, Instance);
      Set_Scope_Via_Field (Entity_Info.Block_Scope,
                           Arch_Info.Block_Parent_Field,
                           Arch_Info.Block_Scope'Access);
   end Push_Architecture_Scope;

   --  Pop scopes created by Push_Architecture_Scope.
   procedure Pop_Architecture_Scope (Arch : Iir)
   is
      Arch_Info   : constant Block_Info_Acc := Get_Info (Arch);
      Entity      : constant Iir := Get_Entity (Arch);
      Entity_Info : constant Block_Info_Acc := Get_Info (Entity);
   begin
      Clear_Scope (Entity_Info.Block_Scope);
      Clear_Scope (Arch_Info.Block_Scope);
   end Pop_Architecture_Scope;

   procedure Translate_Architecture_Body (Arch : Iir)
   is
      Entity               : constant Iir := Get_Entity (Arch);
      Entity_Info          : constant Block_Info_Acc := Get_Info (Entity);
      Info                 : Block_Info_Acc;
      Interface_List       : O_Inter_List;
      Constr               : O_Assoc_List;
      Instance             : O_Dnode_Elab;
      Var_Arch_Instance    : O_Dnode;
      Prev_Subprg_Instance : Subprgs.Subprg_Instance_Stack;
   begin
      if Get_Foreign_Flag (Arch) then
         Error_Msg_Sem (+Arch, "FOREIGN architectures are not yet handled");
      end if;

      Info := Add_Info (Arch, Kind_Block);
      Start_Block_Decl (Arch);
      Push_Instance_Factory (Info.Block_Scope'Access);

      --  We cannot use Add_Scope_Field here, because the entity is not a
      --  child scope of the architecture.
      Info.Block_Parent_Field := Add_Instance_Factory_Field
        (Get_Identifier ("ENTITY"),
         Get_Scope_Type (Entity_Info.Block_Scope));

      Chap9.Translate_Block_Declarations (Arch, Arch);

      Pop_Instance_Factory (Info.Block_Scope'Access);

      --  Declare the constant containing the size of the instance.
      New_Const_Decl
        (Info.Block_Instance_Size, Create_Identifier ("INSTSIZE"),
         Global_Storage, Ghdl_Index_Type);
      if Global_Storage /= O_Storage_External then
         Start_Init_Value (Info.Block_Instance_Size);
         Finish_Init_Value
           (Info.Block_Instance_Size, Get_Scope_Size (Info.Block_Scope));
      end if;

      --  Elaborator.
      for K in Elab_Kind loop
         Start_Procedure_Decl
           (Interface_List, Create_Elab_Identifier (K), Global_Storage);
         New_Interface_Decl
           (Interface_List, Instance (K), Wki_Instance,
            Entity_Info.Block_Decls_Ptr_Type);
         Finish_Subprogram_Decl (Interface_List, Info.Block_Elab_Subprg (K));
      end loop;

      --  Generate RTI.
      if Flag_Rti then
         Rtis.Generate_Unit (Arch);
      end if;

      --  Default configuration
      declare
         Default_Config : constant Iir :=
           Get_Default_Configuration_Declaration (Arch);
         Config_Mark : Id_Mark_Type;
      begin
         --  In case of direct and recursive instantiation, the default
         --  configuration may be needed while translating the architecture.
         --  So translate the declarations of the default configuration before
         --  translating the architecture.
         if Default_Config /= Null_Iir
           and then Get_Configuration_Done_Flag (Default_Config)
         then
            Push_Identifier_Prefix
              (Config_Mark, Name_Table.Get_Identifier ("DEFAULT_CONFIG"));
            Translate_Configuration_Declaration_Decl
              (Get_Library_Unit
                 (Get_Default_Configuration_Declaration (Arch)));
            Pop_Identifier_Prefix (Config_Mark);
         end if;
      end;

      if Global_Storage = O_Storage_External then
         return;
      end if;

      --  Create process subprograms.
      Subprgs.Push_Subprg_Instance (Info.Block_Scope'Access,
                                    Info.Block_Decls_Ptr_Type,
                                    Wki_Instance,
                                    Prev_Subprg_Instance);
      Set_Scope_Via_Field (Entity_Info.Block_Scope,
                           Info.Block_Parent_Field,
                           Info.Block_Scope'Access);

      Chap9.Translate_Block_Subprograms (Arch, Arch);

      Clear_Scope (Entity_Info.Block_Scope);
      Subprgs.Pop_Subprg_Instance (Wki_Instance, Prev_Subprg_Instance);

      --  Elaborator body.
      for K in Elab_Kind loop
         Start_Subprogram_Body (Info.Block_Elab_Subprg (K));
         Push_Local_Factory;

         --  Create a variable for the architecture instance (with the right
         --  type, instead of the entity instance type).
         New_Var_Decl (Var_Arch_Instance, Wki_Arch_Instance,
                       O_Storage_Local, Info.Block_Decls_Ptr_Type);
         New_Assign_Stmt
           (New_Obj (Var_Arch_Instance),
            New_Convert_Ov (New_Value (New_Obj (Instance (K))),
                            Info.Block_Decls_Ptr_Type));

         case K is
            when Elab_Decls =>
               --  Set RTI.
               if Flag_Rti then
                  New_Assign_Stmt
                    (New_Selected_Element
                       (New_Selected_Acc_Value (New_Obj (Instance (K)),
                                                Entity_Info.Block_Link_Field),
                        Rtis.Ghdl_Entity_Link_Rti),
                     New_Unchecked_Address (New_Obj (Info.Block_Rti_Const),
                                            Rtis.Ghdl_Rti_Access));
               end if;
            when Elab_Stmts =>
               null;
         end case;

         --  Call entity elaborators.
         Start_Association (Constr, Entity_Info.Block_Elab_Subprg (K));
         New_Association (Constr, New_Value (New_Obj (Instance (K))));
         New_Procedure_Call (Constr);

         Push_Architecture_Scope (Arch, Var_Arch_Instance);

         New_Debug_Line_Stmt (Get_Line_Number (Arch));

         case K is
            when Elab_Decls =>
               Chap2.Elab_Dependence (Get_Design_Unit (Arch));
               Chap9.Elab_Block_Declarations (Arch, Arch);
            when Elab_Stmts =>
               Chap9.Elab_Block_Statements (Arch, Arch);
         end case;

         Pop_Architecture_Scope (Arch);

         Pop_Local_Factory;
         Finish_Subprogram_Body;
      end loop;
   end Translate_Architecture_Body;

   procedure Translate_Component_Configuration_Decl
     (Cfg : Iir; Blk : Iir; Base_Block : Iir; Num : in out Iir_Int32)
   is
      Inter_List  : O_Inter_List;
      Comp        : Iir_Component_Declaration;
      Comp_Info   : Comp_Info_Acc;
      Info        : Config_Info_Acc;
      Instance    : O_Dnode;
      Mark, Mark2 : Id_Mark_Type;

      Base_Info     : Block_Info_Acc;
      Base_Instance : O_Dnode;

      Block         : Iir_Block_Configuration;
      Binding       : Iir_Binding_Indication;
      Entity_Aspect : Iir;
      Conf_Override : Iir;
      Conf_Info     : Config_Info_Acc;
   begin
      --  Incremental binding.
      if Get_Nbr_Elements (Get_Instantiation_List (Cfg)) = 0 then
         --  This component configuration applies to no component
         --  instantiation, so it is not translated.
         return;
      end if;

      Binding := Get_Binding_Indication (Cfg);
      if Binding = Null_Iir then
         --  This is an unbound component configuration, since this is a
         --  no-op, it is not translated.
         return;
      end if;

      Entity_Aspect := Get_Entity_Aspect (Binding);
      if Get_Kind (Entity_Aspect) = Iir_Kind_Entity_Aspect_Open then
         --  Unbound component.
         return;
      end if;

      Comp := Get_Named_Entity (Get_Component_Name (Cfg));
      Comp_Info := Get_Info (Comp);

      if Get_Kind (Cfg) = Iir_Kind_Component_Configuration then
         Block := Get_Block_Configuration (Cfg);
      else
         Block := Null_Iir;
      end if;

      Push_Identifier_Prefix (Mark, Get_Identifier (Comp), Num);
      Num := Num + 1;

      if Block /= Null_Iir then
         Push_Identifier_Prefix (Mark2, "CONFIG");
         Translate_Configuration_Declaration_Decl (Cfg);
         Translate_Configuration_Declaration_Body (Cfg);
         Pop_Identifier_Prefix (Mark2);
         Conf_Override := Cfg;
         Conf_Info := Get_Info (Cfg);
         Clear_Info (Cfg);
      else
         Conf_Info := null;
         Conf_Override := Null_Iir;
      end if;
      Info := Add_Info (Cfg, Kind_Config);

      Base_Info := Get_Info (Base_Block);

      Chap4.Translate_Association_Subprograms
        (Binding, Blk, Base_Block,
         Get_Entity_From_Entity_Aspect (Entity_Aspect));

      Start_Procedure_Decl
        (Inter_List, Create_Identifier, O_Storage_Private);
      New_Interface_Decl (Inter_List, Instance, Wki_Instance,
                          Comp_Info.Comp_Ptr_Type);
      New_Interface_Decl (Inter_List, Base_Instance, Get_Identifier ("BLK"),
                          Base_Info.Block_Decls_Ptr_Type);
      Finish_Subprogram_Decl (Inter_List, Info.Config_Subprg);

      --  Extract the entity/architecture.

      Start_Subprogram_Body (Info.Config_Subprg);
      Push_Local_Factory;

      if Get_Kind (Base_Block) = Iir_Kind_Architecture_Body then
         Push_Architecture_Scope (Base_Block, Base_Instance);
      else
         Set_Scope_Via_Param_Ptr (Base_Info.Block_Scope, Base_Instance);
      end if;

      Set_Scope_Via_Param_Ptr (Comp_Info.Comp_Scope, Instance);

      if Conf_Info /= null then
         Clear_Info (Cfg);
         Set_Info (Cfg, Conf_Info);
      end if;
      Chap9.Translate_Entity_Instantiation
        (Entity_Aspect, Binding, Comp, Conf_Override);
      if Conf_Info /= null then
         Clear_Info (Cfg);
         Set_Info (Cfg, Info);
      end if;

      Clear_Scope (Comp_Info.Comp_Scope);

      if Get_Kind (Base_Block) = Iir_Kind_Architecture_Body then
         Pop_Architecture_Scope (Base_Block);
      else
         Clear_Scope (Base_Info.Block_Scope);
      end if;

      Pop_Local_Factory;
      Finish_Subprogram_Body;

      Pop_Identifier_Prefix (Mark);
   end Translate_Component_Configuration_Decl;

   --  Create subprogram specifications for each configuration_specification
   --  in BLOCK_CONFIG and its sub-blocks.
   --  BLOCK is the block being configured (initially the architecture),
   --  BASE_BLOCK is the root block giving the instance (initially the
   --  architecture)
   --  NUM is an integer used to generate uniq names.
   procedure Translate_Block_Configuration_Decls
     (Block_Config : Iir_Block_Configuration;
      Block        : Iir;
      Base_Block   : Iir;
      Num          : in out Iir_Int32)
   is
      El : Iir;
   begin
      El := Get_Configuration_Item_Chain (Block_Config);
      while El /= Null_Iir loop
         case Get_Kind (El) is
            when Iir_Kind_Component_Configuration
               | Iir_Kind_Configuration_Specification =>
               Translate_Component_Configuration_Decl
                 (El, Block, Base_Block, Num);
            when Iir_Kind_Block_Configuration =>
               declare
                  Mark      : Id_Mark_Type;
                  Base_Info : constant Block_Info_Acc :=
                    Get_Info (Base_Block);
                  Blk      : constant Iir := Get_Block_From_Block_Specification
                    (Get_Block_Specification (El));
                  Blk_Info  : constant Block_Info_Acc := Get_Info (Blk);
               begin
                  Push_Identifier_Prefix (Mark, Get_Identifier (Blk));
                  case Get_Kind (Blk) is
                     when Iir_Kind_Generate_Statement_Body =>
                        Set_Scope_Via_Field_Ptr
                          (Base_Info.Block_Scope,
                           Blk_Info.Block_Origin_Field,
                           Blk_Info.Block_Scope'Access);
                        Translate_Block_Configuration_Decls
                          (El, Blk, Blk, Num);
                        Clear_Scope (Base_Info.Block_Scope);
                     when Iir_Kind_Block_Statement =>
                        Translate_Block_Configuration_Decls
                          (El, Blk, Base_Block, Num);
                     when others =>
                        Error_Kind
                          ("translate_block_configuration_decls(2)", Blk);
                  end case;
                  Pop_Identifier_Prefix (Mark);
               end;
            when others =>
               Error_Kind ("translate_block_configuration_decls(1)", El);
         end case;
         El := Get_Chain (El);
      end loop;
   end Translate_Block_Configuration_Decls;

   procedure Translate_Component_Configuration_Call
     (Cfg : Iir; Base_Block : Iir; Block_Info : Block_Info_Acc)
   is
      Binding : constant Iir := Get_Binding_Indication (Cfg);
      Aspect : Iir;
      Cfg_Info  : Config_Info_Acc;
      Base_Info : Block_Info_Acc;
   begin
      if Is_Null (Binding) then
         --  Unbound component configuration, nothing to do.
         return;
      end if;
      Aspect := Get_Entity_Aspect (Binding);
      if Is_Null (Aspect)
        or else Get_Kind (Aspect) = Iir_Kind_Entity_Aspect_Open
      then
         return;
      end if;

      Cfg_Info := Get_Info (Cfg);
      Base_Info := Get_Info (Base_Block);

      --  Call the subprogram for the instantiation list.
      declare
         List : Iir_List;
         El   : Iir;
      begin
         List := Get_Instantiation_List (Cfg);
         for I in Natural loop
            El := Get_Nth_Element (List, I);
            exit when El = Null_Iir;
            El := Get_Named_Entity (El);
            case Get_Kind (El) is
               when Iir_Kind_Component_Instantiation_Statement =>
                  declare
                     Assoc     : O_Assoc_List;
                     Info      : constant Block_Info_Acc := Get_Info (El);
                     Comp_Info : constant Comp_Info_Acc :=
                       Get_Info (Get_Named_Entity
                                 (Get_Instantiated_Unit (El)));
                     V         : O_Lnode;
                  begin
                     --  The component is really a component and not a
                     --  direct instance.
                     Start_Association (Assoc, Cfg_Info.Config_Subprg);
                     V := Get_Instance_Ref (Block_Info.Block_Scope);
                     V := New_Selected_Element (V, Info.Block_Link_Field);
                     New_Association
                       (Assoc, New_Address (V, Comp_Info.Comp_Ptr_Type));
                     V := Get_Instance_Ref (Base_Info.Block_Scope);
                     New_Association
                       (Assoc,
                        New_Address (V, Base_Info.Block_Decls_Ptr_Type));
                     New_Procedure_Call (Assoc);
                  end;
               when others =>
                  Error_Kind ("translate_component_configuration", El);
            end case;
         end loop;
      end;
   end Translate_Component_Configuration_Call;

   procedure Translate_Block_Configuration_Calls
     (Block_Config : Iir_Block_Configuration;
      Base_Block   : Iir;
      Base_Info    : Block_Info_Acc);

   procedure Translate_For_Generate_Block_Configuration_Calls
     (Block_Config : Iir_Block_Configuration;
      Parent_Info  : Block_Info_Acc)
   is
      Spec   : constant Iir := Get_Block_Specification (Block_Config);
      Bod    : constant Iir := Get_Block_From_Block_Specification (Spec);
      Block  : constant Iir := Get_Parent (Bod);
      Info   : constant Block_Info_Acc := Get_Info (Bod);

      Iter : constant Iir := Get_Parameter_Specification (Block);
      Iter_Type : constant Iir := Get_Type (Iter);
      Type_Info : constant Type_Info_Acc :=
        Get_Info (Get_Base_Type (Iter_Type));

      --  Generate a call for a iterative generate block whose index is
      --  INDEX.
      --  FAILS is true if it is an error if the block is already
      --  configured.
      procedure Gen_Subblock_Call (Index : O_Enode; Fails : Boolean)
      is
         Var_Inst : O_Dnode;
         If_Blk   : O_If_Block;
      begin
         Open_Temp;
         Var_Inst := Create_Temp (Info.Block_Decls_Ptr_Type);
         New_Assign_Stmt
           (New_Obj (Var_Inst),
            New_Address (New_Indexed_Element
              (New_Acc_Value
                   (New_Selected_Element
                      (Get_Instance_Ref (Parent_Info.Block_Scope),
                         Info.Block_Parent_Field)),
                   Index),
              Info.Block_Decls_Ptr_Type));
         --  Configure only if not yet configured.
         Start_If_Stmt
           (If_Blk,
            New_Compare_Op (ON_Eq,
              New_Value_Selected_Acc_Value
                (New_Obj (Var_Inst),
                 Info.Block_Configured_Field),
              New_Lit (Ghdl_Bool_False_Node),
              Ghdl_Bool_Type));
         --  Mark the block as configured.
         New_Assign_Stmt
           (New_Selected_Acc_Value (New_Obj (Var_Inst),
            Info.Block_Configured_Field),
            New_Lit (Ghdl_Bool_True_Node));
         Set_Scope_Via_Param_Ptr (Info.Block_Scope, Var_Inst);
         Translate_Block_Configuration_Calls (Block_Config, Bod, Info);
         Clear_Scope (Info.Block_Scope);

         if Fails then
            New_Else_Stmt (If_Blk);
            --  Already configured.
            Chap6.Gen_Program_Error
              (Block_Config, Chap6.Prg_Err_Block_Configured);
         end if;

         Finish_If_Stmt (If_Blk);
         Close_Temp;
      end Gen_Subblock_Call;

      procedure Apply_To_All_Others_Blocks (Is_All : Boolean)
      is
         Var_I : O_Dnode;
         Label : O_Snode;
      begin
         Start_Declare_Stmt;
         New_Var_Decl (Var_I, Wki_I, O_Storage_Local, Ghdl_Index_Type);
         Init_Var (Var_I);
         Start_Loop_Stmt (Label);
         Gen_Exit_When
           (Label,
            New_Compare_Op
              (ON_Eq,
               New_Value (New_Obj (Var_I)),
               New_Value
                 (New_Selected_Element
                      (Get_Var (Get_Info (Iter_Type).S.Range_Var),
                       Type_Info.B.Range_Length)),
               Ghdl_Bool_Type));
         --  Selected_name is for default configurations, so
         --  program should not fail if a block is already
         --  configured but continue silently.
         Gen_Subblock_Call (New_Value (New_Obj (Var_I)), Is_All);
         Inc_Var (Var_I);
         Finish_Loop_Stmt (Label);
         Finish_Declare_Stmt;
      end Apply_To_All_Others_Blocks;
   begin
      case Get_Kind (Spec) is
         when Iir_Kind_For_Generate_Statement
           | Iir_Kind_Simple_Name =>
            Apply_To_All_Others_Blocks (True);
         when Iir_Kind_Indexed_Name =>
            declare
               Index_List : constant Iir_List := Get_Index_List (Spec);
               Rng        : Mnode;
            begin
               if Index_List = Iir_List_Others then
                  Apply_To_All_Others_Blocks (False);
               else
                  Open_Temp;
                  Rng := Stabilize (Chap3.Type_To_Range (Iter_Type));
                  Gen_Subblock_Call
                    (Chap6.Translate_Index_To_Offset
                       (Rng,
                        Chap7.Translate_Expression
                          (Get_Nth_Element (Index_List, 0), Iter_Type),
                        Iter, Iter_Type, Spec),
                     True);
                  Close_Temp;
               end if;
            end;
         when Iir_Kind_Slice_Name =>
            declare
               Rng         : Mnode;
               Slice       : O_Dnode;
               Left, Right : O_Dnode;
               Index       : O_Dnode;
               High        : O_Dnode;
               If_Blk      : O_If_Block;
               Label       : O_Snode;
            begin
               Open_Temp;
               Rng := Stabilize (Chap3.Type_To_Range (Iter_Type));
               Slice := Create_Temp (Type_Info.B.Range_Type);
               Chap7.Translate_Discrete_Range
                 (Dv2M (Slice, Type_Info, Mode_Value,
                        Type_Info.B.Range_Type, Type_Info.B.Range_Ptr_Type),
                  Get_Suffix (Spec));
               Left := Create_Temp_Init
                 (Ghdl_Index_Type,
                  Chap6.Translate_Index_To_Offset
                    (Rng,
                     New_Value (New_Selected_Element
                                  (New_Obj (Slice), Type_Info.B.Range_Left)),
                     Spec, Iter_Type, Spec));
               Right := Create_Temp_Init
                 (Ghdl_Index_Type,
                  Chap6.Translate_Index_To_Offset
                    (Rng,
                     New_Value (New_Selected_Element
                                  (New_Obj (Slice),
                                   Type_Info.B.Range_Right)),
                     Spec, Iter_Type, Spec));
               Index := Create_Temp (Ghdl_Index_Type);
               High := Create_Temp (Ghdl_Index_Type);
               Start_If_Stmt
                 (If_Blk,
                  New_Compare_Op (ON_Eq,
                                  M2E (Chap3.Range_To_Dir (Rng)),
                                  New_Value
                                    (New_Selected_Element
                                       (New_Obj (Slice),
                                        Type_Info.B.Range_Dir)),
                                  Ghdl_Bool_Type));
               --  Same direction, so left to right.
               New_Assign_Stmt (New_Obj (Index),
                                New_Value (New_Obj (Left)));
               New_Assign_Stmt (New_Obj (High),
                                New_Value (New_Obj (Right)));
               New_Else_Stmt (If_Blk);
               --  Opposite direction, so right to left.
               New_Assign_Stmt (New_Obj (Index),
                                New_Value (New_Obj (Right)));
               New_Assign_Stmt (New_Obj (High),
                                New_Value (New_Obj (Left)));
               Finish_If_Stmt (If_Blk);

               --  Loop.
               Start_Loop_Stmt (Label);
               Gen_Exit_When
                 (Label, New_Compare_Op (ON_Gt,
                                         New_Value (New_Obj (Index)),
                                         New_Value (New_Obj (High)),
                                         Ghdl_Bool_Type));
               Open_Temp;
               Gen_Subblock_Call (New_Value (New_Obj (Index)), True);
               Close_Temp;
               Inc_Var (Index);
               Finish_Loop_Stmt (Label);
               Close_Temp;
            end;
         when others =>
            Error_Kind
              ("translate_for_generate_block_configuration_calls", Spec);
      end case;
   end Translate_For_Generate_Block_Configuration_Calls;

   procedure Translate_If_Case_Generate_Block_Configuration_Calls
     (Block_Config : Iir_Block_Configuration;
      Parent_Info  : Block_Info_Acc)
   is
      Spec   : constant Iir := Get_Block_Specification (Block_Config);
      Bod    : constant Iir := Get_Block_From_Block_Specification (Spec);
      Gen    : constant Iir := Get_Parent (Bod);
      Gen_Info : constant Generate_Info_Acc := Get_Info (Gen);
      Bod_Info : constant Block_Info_Acc := Get_Info (Bod);
      Var    : O_Dnode;
      If_Blk : O_If_Block;

   begin
      --  Configure the block only if block id matches.
      Start_If_Stmt
        (If_Blk,
         New_Compare_Op
           (ON_Eq,
            New_Value (New_Selected_Element
                         (Get_Instance_Ref (Parent_Info.Block_Scope),
                          Gen_Info.Generate_Body_Id)),
            New_Lit (New_Index_Lit (Unsigned_64 (Bod_Info.Block_Id))),
            Ghdl_Bool_Type));

      Open_Temp;
      Var := Create_Temp_Init
        (Bod_Info.Block_Decls_Ptr_Type,
         New_Convert_Ov
           (New_Value (New_Selected_Element
                         (Get_Instance_Ref (Parent_Info.Block_Scope),
                          Gen_Info.Generate_Parent_Field)),
            Bod_Info.Block_Decls_Ptr_Type));
      Set_Scope_Via_Param_Ptr (Bod_Info.Block_Scope, Var);
      Translate_Block_Configuration_Calls (Block_Config, Bod, Bod_Info);
      Clear_Scope (Bod_Info.Block_Scope);
      Close_Temp;

      Finish_If_Stmt (If_Blk);
   end Translate_If_Case_Generate_Block_Configuration_Calls;

   procedure Translate_Block_Configuration_Calls
     (Block_Config : Iir_Block_Configuration;
      Base_Block   : Iir;
      Base_Info    : Block_Info_Acc)
   is
      procedure Translate_Block_Block_Configuration_Calls (Item : Iir)
      is
         Block : Iir;
      begin
         Block := Get_Block_Specification (Item);
         case Get_Kind (Block) is
            when Iir_Kind_Indexed_Name
              | Iir_Kind_Slice_Name =>
               Block := Get_Named_Entity (Get_Prefix (Block));
            when Iir_Kinds_Denoting_Name
              | Iir_Kind_Parenthesis_Name =>
               Block := Get_Named_Entity (Block);
            when others =>
               null;
         end case;

         case Get_Kind (Block) is
            when Iir_Kind_Block_Statement =>
               Translate_Block_Configuration_Calls
                 (Item, Base_Block, Get_Info (Block));
            when Iir_Kind_Generate_Statement_Body =>
               case Get_Kind (Get_Parent (Block)) is
                  when Iir_Kind_If_Generate_Statement
                    | Iir_Kind_If_Generate_Else_Clause
                    | Iir_Kind_Case_Generate_Statement => --  FIXME
                     Translate_If_Case_Generate_Block_Configuration_Calls
                       (Item, Base_Info);
                  when Iir_Kind_For_Generate_Statement =>
                     Translate_For_Generate_Block_Configuration_Calls
                       (Item, Base_Info);
                  when others =>
                     Error_Kind ("translate_block_configuration_calls(3)",
                                 Get_Parent (Block));
               end case;
            when others =>
               Error_Kind ("translate_block_configuration_calls(4)", Block);
         end case;
      end Translate_Block_Block_Configuration_Calls;

      El : Iir;
   begin
      El := Get_Configuration_Item_Chain (Block_Config);
      while El /= Null_Iir loop
         case Get_Kind (El) is
            when Iir_Kind_Component_Configuration
               | Iir_Kind_Configuration_Specification =>
               Translate_Component_Configuration_Call
                 (El, Base_Block, Base_Info);
            when Iir_Kind_Block_Configuration =>
               Translate_Block_Block_Configuration_Calls (El);
            when others =>
               Error_Kind ("translate_block_configuration_calls(2)", El);
         end case;
         El := Get_Chain (El);
      end loop;
   end Translate_Block_Configuration_Calls;

   procedure Translate_Configuration_Declaration_Decl (Config : Iir)
   is
      Block_Config   : constant Iir_Block_Configuration :=
        Get_Block_Configuration (Config);
      Arch           : constant Iir_Architecture_Body :=
        Strip_Denoting_Name (Get_Block_Specification (Block_Config));
      Arch_Info      : constant Block_Info_Acc := Get_Info (Arch);
      Interface_List : O_Inter_List;
      Config_Info    : Config_Info_Acc;
   begin
      Config_Info := Add_Info (Config, Kind_Config);

      --  Configurator.
      Start_Procedure_Decl
        (Interface_List, Create_Identifier, Global_Storage);
      New_Interface_Decl (Interface_List, Config_Info.Config_Instance,
                          Wki_Instance, Arch_Info.Block_Decls_Ptr_Type);
      Finish_Subprogram_Decl (Interface_List, Config_Info.Config_Subprg);
   end Translate_Configuration_Declaration_Decl;

   procedure Translate_Configuration_Declaration_Body (Config : Iir)
   is
      Block_Config   : constant Iir_Block_Configuration :=
        Get_Block_Configuration (Config);
      Arch           : constant Iir_Architecture_Body :=
        Strip_Denoting_Name (Get_Block_Specification (Block_Config));
      Arch_Info      : constant Block_Info_Acc := Get_Info (Arch);
      Config_Info    : constant Config_Info_Acc := Get_Info (Config);
      Num            : Iir_Int32;
      Final          : Boolean;
   begin
      if Global_Storage = O_Storage_External then
         return;
      end if;

      if Get_Kind (Config) = Iir_Kind_Configuration_Declaration then
         Chap4.Translate_Declaration_Chain (Config);
      end if;

      --  Declare subprograms for configuration.
      Num := 0;
      Translate_Block_Configuration_Decls (Block_Config, Arch, Arch, Num);

      --  Body.
      Start_Subprogram_Body (Config_Info.Config_Subprg);
      Push_Local_Factory;

      Push_Architecture_Scope (Arch, Config_Info.Config_Instance);

      if Get_Kind (Config) = Iir_Kind_Configuration_Declaration then
         Open_Temp;
         Chap4.Elab_Declaration_Chain (Config, Final);
         Close_Temp;
         if Final then
            raise Internal_Error;
         end if;
      end if;

      Translate_Block_Configuration_Calls (Block_Config, Arch, Arch_Info);

      Pop_Architecture_Scope (Arch);
      Pop_Local_Factory;
      Finish_Subprogram_Body;
   end Translate_Configuration_Declaration_Body;
end Trans.Chap1;