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-- Interpreted 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 System;
with Grt.Types; use Grt.Types;
with Iirs; use Iirs;
with Iir_Values; use Iir_Values;
with Elaboration; use Elaboration;
package Simulation is
Trace_Simulation : Boolean := False;
Disp_Tree : Boolean := False;
Disp_Stats : Boolean := False;
Disp_Ams : Boolean := False;
type Resolv_Instance_Type is record
Func : Iir;
Block : Block_Instance_Acc;
Sig : Iir_Value_Literal_Acc;
end record;
type Resolv_Instance_Acc is access Resolv_Instance_Type;
-- The resolution procedure for GRT.
procedure Resolution_Proc (Instance_Addr : System.Address;
Val : System.Address;
Bool_Vec : System.Address;
Vec_Len : Ghdl_Index_Type;
Nbr_Drv : Ghdl_Index_Type;
Nbr_Ports : Ghdl_Index_Type);
pragma Convention (C, Resolution_Proc);
type Guard_Instance_Type is record
Instance : Block_Instance_Acc;
Guard : Iir;
end record;
type Guard_Instance_Acc is access Guard_Instance_Type;
function Guard_Func (Data : System.Address) return Ghdl_B1;
pragma Convention (C, Guard_Func);
function Execute_Signal_Value (Indirect: Iir_Value_Literal_Acc)
return Iir_Value_Literal_Acc;
function Execute_Event_Attribute (Lit: Iir_Value_Literal_Acc)
return Boolean;
function Execute_Active_Attribute (Lit: Iir_Value_Literal_Acc)
return Boolean;
function Execute_Driving_Attribute (Lit: Iir_Value_Literal_Acc)
return Boolean;
function Execute_Last_Value_Attribute (Indirect: Iir_Value_Literal_Acc)
return Iir_Value_Literal_Acc;
function Execute_Driving_Value_Attribute (Indirect: Iir_Value_Literal_Acc)
return Iir_Value_Literal_Acc;
-- Return the Last_Event absolute time.
function Execute_Last_Event_Attribute (Indirect: Iir_Value_Literal_Acc)
return Ghdl_I64;
function Execute_Last_Active_Attribute (Indirect: Iir_Value_Literal_Acc)
return Ghdl_I64;
-- Type for a transaction: it contains the value, the absolute time at which
-- the transaction should occur and a pointer to the next transaction.
-- This constitute a simple linked list, the elements must be ordered
-- according to time.
type Transaction_El_Type is record
-- The value of the waveform element.
-- Can't be an array.
-- Life must be target.
Value: Iir_Value_Literal_Acc;
-- After time at which the transaction should occur.
After : Grt.Types.Std_Time;
end record;
type Transaction_Array is array (Natural range <>) of Transaction_El_Type;
type Transaction_Type (Len : Natural) is record
-- Statement that created this transaction. Used to disp location
-- in case of error (constraint error).
Stmt: Iir;
Reject : Std_Time;
Els : Transaction_Array (1 .. Len);
end record;
procedure Assign_Value_To_Signal (Instance: Block_Instance_Acc;
Target: Iir_Value_Literal_Acc;
Transaction: Transaction_Type);
procedure Disconnect_Signal (Sig : Iir_Value_Literal_Acc);
-- Return true if the process should be suspended.
function Execute_Wait_Statement (Instance : Block_Instance_Acc;
Stmt: Iir_Wait_Statement)
return Boolean;
private
type Read_Signal_Value_Enum is
(Read_Signal_Last_Value,
-- For conversion functions.
Read_Signal_Driving_Value,
Read_Signal_Effective_Value,
-- 'Driving_Value
Read_Signal_Driver_Value);
function Execute_Read_Signal_Value (Sig: Iir_Value_Literal_Acc;
Attr : Read_Signal_Value_Enum)
return Iir_Value_Literal_Acc;
type Write_Signal_Enum is
(Write_Signal_Driving_Value,
Write_Signal_Effective_Value);
procedure Execute_Write_Signal (Sig: Iir_Value_Literal_Acc;
Val : Iir_Value_Literal_Acc;
Attr : Write_Signal_Enum);
end Simulation;
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