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
|
-- Elaboration for interpretation
-- Copyright (C) 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 GHDL; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Ada.Unchecked_Deallocation;
with GNAT.Table;
with Iirs; use Iirs;
with Iir_Values; use Iir_Values;
with Grt.Types;
with Annotations; use Annotations;
with Areapools;
-- This package elaborates design hierarchy.
package Elaboration is
Trace_Elaboration : Boolean := False;
Trace_Drivers : Boolean := False;
-- A block instance with its architecture/entity declaration is an
-- instancied entity.
type Block_Instance_Type;
type Block_Instance_Acc is access Block_Instance_Type;
type Objects_Array is array (Object_Slot_Type range <>) of
Iir_Value_Literal_Acc;
-- A block instance with its architecture/entity declaration is an
-- instancied entity.
type Block_Instance_Type (Max_Objs : Object_Slot_Type) is record
-- Flag for wait statement: true if not yet executed.
In_Wait_Flag : Boolean;
-- Useful informations for a dynamic block (ie, a frame).
-- The scope level and an access to the block of upper scope level.
Scope_Level: Scope_Level_Type;
Up_Block: Block_Instance_Acc;
-- Block, architecture, package, process, component instantiation for
-- this instance.
Label : Iir;
-- For blocks: corresponding block (different from label for direct
-- component instantiation statement and generate iterator).
-- For packages: Null_Iir
-- For subprograms and processes: statement being executed.
Stmt : Iir;
-- Instanciation tree.
-- Parent is always set (but null for top-level block and packages)
Parent: Block_Instance_Acc;
-- Not null only for blocks and processes.
Children: Block_Instance_Acc;
Brother: Block_Instance_Acc;
-- Pool marker for the child (only for subprograms and processes).
Marker : Areapools.Mark_Type;
-- Reference to the actuals, for copy-out when returning from a
-- procedure.
Actuals_Ref : Value_Array_Acc;
-- Only for function frame; contains the result.
Result: Iir_Value_Literal_Acc;
-- Last object elaborated (or number of objects elaborated).
-- Note: this is generally the slot index of the next object to be
-- elaborated (this may be wrong for dynamic objects due to execution
-- branches).
Elab_Objects : Object_Slot_Type := 0;
-- Values of the objects in that frame.
Objects : Objects_Array (1 .. Max_Objs);
end record;
procedure Free is new Ada.Unchecked_Deallocation
(Object => Block_Instance_Type, Name => Block_Instance_Acc);
procedure Elaborate_Design (Design: Iir_Design_Unit);
procedure Elaborate_Declarative_Part
(Instance : Block_Instance_Acc; Decl_Chain : Iir);
-- Reverse operation of Elaborate_Declarative_Part.
-- At least, finalize files.
procedure Finalize_Declarative_Part
(Instance : Block_Instance_Acc; Decl_Chain : Iir);
procedure Elaborate_Declaration (Instance : Block_Instance_Acc; Decl : Iir);
procedure Destroy_Iterator_Declaration
(Instance : Block_Instance_Acc; Decl : Iir);
-- Create a value for type DECL. Initialize it if DEFAULT is true.
function Create_Value_For_Type
(Block: Block_Instance_Acc; Decl: Iir; Default : Boolean)
return Iir_Value_Literal_Acc;
-- LRM93 §12.3.1.3 Subtype Declarations
-- The elaboration of a subtype indication creates a subtype.
-- Used for allocator.
procedure Elaborate_Subtype_Indication
(Instance : Block_Instance_Acc; Ind : Iir);
-- Create object DECL.
-- This does nothing except marking DECL as elaborated.
-- Used by simulation to dynamically create subprograms interfaces.
procedure Create_Object (Instance : Block_Instance_Acc; Decl : Iir);
procedure Create_Signal (Instance : Block_Instance_Acc; Decl : Iir);
Top_Instance: Block_Instance_Acc;
type Block_Instance_Acc_Array is array (Instance_Slot_Type range <>) of
Block_Instance_Acc;
type Block_Instance_Acc_Array_Acc is access Block_Instance_Acc_Array;
Package_Instances : Block_Instance_Acc_Array_Acc;
-- Disconnections. For each disconnection specification, the elaborator
-- adds an entry in the table.
type Disconnection_Entry is record
Sig : Iir_Value_Literal_Acc;
Time : Iir_Value_Time;
end record;
package Disconnection_Table is new GNAT.Table
(Table_Component_Type => Disconnection_Entry,
Table_Index_Type => Integer,
Table_Low_Bound => 0,
Table_Initial => 16,
Table_Increment => 100);
-- Connections. For each associations (block/component/entry), the
-- elaborator adds an entry in that table.
type Connect_Entry is record
Formal : Iir_Value_Literal_Acc;
Formal_Instance : Block_Instance_Acc;
Actual : Iir_Value_Literal_Acc;
Actual_Instance : Block_Instance_Acc;
Assoc : Iir;
end record;
package Connect_Table is new GNAT.Table
(Table_Component_Type => Connect_Entry,
Table_Index_Type => Integer,
Table_Low_Bound => 0,
Table_Initial => 32,
Table_Increment => 100);
-- Signals.
type Signal_Type_Kind is
(User_Signal,
Implicit_Quiet, Implicit_Stable, Implicit_Delayed,
Implicit_Transaction,
Guard_Signal);
type Signal_Entry (Kind : Signal_Type_Kind := User_Signal) is record
Decl : Iir;
Sig : Iir_Value_Literal_Acc;
Instance : Block_Instance_Acc;
case Kind is
when User_Signal =>
Init : Iir_Value_Literal_Acc;
when Implicit_Quiet | Implicit_Stable | Implicit_Delayed
| Implicit_Transaction =>
Time : Grt.Types.Ghdl_I64;
Prefix : Iir_Value_Literal_Acc;
when Guard_Signal =>
null;
end case;
end record;
package Signals_Table is new GNAT.Table
(Table_Component_Type => Signal_Entry,
Table_Index_Type => Integer,
Table_Low_Bound => 0,
Table_Initial => 128,
Table_Increment => 100);
type Process_Index_Type is new Natural;
package Processes_Table is new GNAT.Table
(Table_Component_Type => Block_Instance_Acc,
Table_Index_Type => Process_Index_Type,
Table_Low_Bound => 1,
Table_Initial => 128,
Table_Increment => 100);
package Protected_Table is new GNAT.Table
(Table_Component_Type => Block_Instance_Acc,
Table_Index_Type => Protected_Index_Type,
Table_Low_Bound => 1,
Table_Initial => 2,
Table_Increment => 100);
end Elaboration;
|
