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
|
-- Interpreter AMS simulation
-- 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 Vhdl.Errors; use Vhdl.Errors;
with Simul.Execution;
package body Simul.Elaboration.AMS is
function Create_Characteristic_Expression
(Kind : Characteristic_Expr_Kind) return Characteristic_Expressions_Index
is
begin
case Kind is
when Contribution =>
Characteristic_Expressions.Append
((Kind => Contribution,
Expr => null,
Tolerance => 0,
Dependencies => null));
when others =>
raise Program_Error;
end case;
return Characteristic_Expressions.Last;
end Create_Characteristic_Expression;
function Create_Scalar_Quantity (Kind : Quantity_Kind;
Decl : Iir;
Instance : Block_Instance_Acc)
return Quantity_Index_Type
is
begin
case Kind is
when Quantity_Reference =>
Scalar_Quantities.Append
((Kind => Quantity_Reference,
Value => 0.0,
Decl => Decl,
Instance => Instance,
Contribution =>
Create_Characteristic_Expression (Contribution)));
when Quantity_Across =>
Scalar_Quantities.Append
((Kind => Quantity_Across,
Value => 0.0,
Decl => Decl,
Instance => Instance));
when Quantity_Through =>
Scalar_Quantities.Append
((Kind => Quantity_Through,
Value => 0.0,
Decl => Decl,
Instance => Instance));
when others =>
raise Program_Error;
end case;
return Scalar_Quantities.Last;
end Create_Scalar_Quantity;
function Create_Scalar_Terminal (Decl : Iir;
Instance : Block_Instance_Acc)
return Terminal_Index_Type
is
begin
-- Simply create the reference quantity for a terminal
return Terminal_Index_Type
(Create_Scalar_Quantity (Quantity_Reference, Decl, Instance));
end Create_Scalar_Terminal;
function Get_Terminal_Reference (Terminal : Terminal_Index_Type)
return Quantity_Index_Type is
begin
return Quantity_Index_Type (Terminal);
end Get_Terminal_Reference;
procedure Add_Characteristic_Expression
(Kind : Characteristic_Expr_Kind; Expr : Ams_Term_Acc)
is
begin
Characteristic_Expressions.Append
((Kind => Kind,
Expr => Expr,
Tolerance => Default_Tolerance_Index,
Dependencies => null));
end Add_Characteristic_Expression;
procedure Compute_Dependencies (Idx : Characteristic_Expressions_Index)
is
package Quantity_Table is new Tables
(Table_Component_Type => Quantity_Index_Type,
Table_Index_Type => Natural,
Table_Low_Bound => 1,
Table_Initial => 16);
El : Characteristic_Expr renames Characteristic_Expressions.Table (Idx);
Res : Quantity_Dependency_Acc := null;
procedure Add_Dependency (Block : Block_Instance_Acc; N : Iir)
is
Q : Iir_Value_Literal_Acc;
begin
case Get_Kind (N) is
when Iir_Kinds_Branch_Quantity_Declaration =>
Q := Execution.Execute_Name (Block, N, True);
Quantity_Table.Append (Q.Quantity);
when Iir_Kind_Simple_Name =>
Add_Dependency (Block, Get_Named_Entity (N));
when Iir_Kinds_Dyadic_Operator =>
Add_Dependency (Block, Get_Left (N));
Add_Dependency (Block, Get_Right (N));
when Iir_Kinds_Literal =>
null;
when others =>
Error_Kind ("compute_dependencies", N);
end case;
end Add_Dependency;
Term : Ams_Term_Acc := El.Expr;
begin
pragma Assert (El.Dependencies = null);
while Term /= null loop
case Term.Op is
when Op_Quantity =>
Quantity_Table.Append (Term.Quantity);
when Op_Vhdl_Expr =>
Add_Dependency (Term.Vhdl_Instance, Term.Vhdl_Expr);
end case;
Term := Term.Next;
end loop;
Res := new Quantity_Dependency_Type (Nbr => Quantity_Table.Last);
for I in Quantity_Table.First .. Quantity_Table.Last loop
Res.Quantities (I) := Quantity_Table.Table (I);
end loop;
Quantity_Table.Free;
El.Dependencies := Res;
end Compute_Dependencies;
function Build (Op : Ams_Sign;
Val : Quantity_Index_Type;
Right : Ams_Term_Acc := null)
return Ams_Term_Acc
is
begin
return new Ams_Term'(Op => Op_Quantity,
Sign => Op,
Next => Right,
Quantity => Val);
end Build;
function Build (Op : Ams_Sign;
Instance : Block_Instance_Acc;
Expr : Iir;
Right : Ams_Term_Acc := null)
return Ams_Term_Acc
is
begin
return new Ams_Term'
(Op => Op_Vhdl_Expr,
Sign => Op,
Vhdl_Expr => Expr,
Vhdl_Instance => Instance,
Next => Right);
end Build;
procedure Append_Characteristic_Expression
(Terminal : Terminal_Index_Type; Expr : Ams_Term_Acc)
is
Ref : constant Quantity_Index_Type := Get_Terminal_Reference (Terminal);
Ce : constant Characteristic_Expressions_Index :=
Scalar_Quantities.Table (Ref).Contribution;
begin
pragma Assert (Expr.Next = null);
Expr.Next := Characteristic_Expressions.Table (Ce).Expr;
Characteristic_Expressions.Table (Ce).Expr := Expr;
end Append_Characteristic_Expression;
procedure Create_Tables is
begin
for I in Characteristic_Expressions.First
.. Characteristic_Expressions.Last
loop
Compute_Dependencies (I);
end loop;
end Create_Tables;
end Simul.Elaboration.AMS;
|
