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-- Synthesis context.
-- Copyright (C) 2017 Tristan Gingold
--
-- This file is part of GHDL.
--
-- This program 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 of the License, or
-- (at your option) any later version.
--
-- This program 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 this program; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
-- MA 02110-1301, USA.
with Synth.Environment; use Synth.Environment;
with Synth.Values; use Synth.Values;
with Vhdl.Annotations; use Vhdl.Annotations;
with Netlists; use Netlists;
with Netlists.Builders;
with Vhdl.Nodes; use Vhdl.Nodes;
package Synth.Context is
-- Values are stored into Synth_Instance, which is parallel to simulation
-- Block_Instance_Type.
type Synth_Instance_Type (<>) is limited private;
type Synth_Instance_Acc is access Synth_Instance_Type;
-- Global context.
Build_Context : Netlists.Builders.Context_Acc;
function Get_Instance_By_Scope
(Syn_Inst: Synth_Instance_Acc; Scope: Sim_Info_Acc)
return Synth_Instance_Acc;
function Make_Base_Instance return Synth_Instance_Acc;
-- Create and free the corresponding synth instance.
function Make_Instance (Parent : Synth_Instance_Acc;
Blk : Node;
Name : Sname := No_Sname)
return Synth_Instance_Acc;
procedure Free_Instance (Synth_Inst : in out Synth_Instance_Acc);
function Get_Sname (Inst : Synth_Instance_Acc) return Sname;
pragma Inline (Get_Sname);
function Get_Build (Inst : Synth_Instance_Acc)
return Netlists.Builders.Context_Acc;
pragma Inline (Get_Build);
function Get_Top_Module (Inst : Synth_Instance_Acc) return Module;
function Get_Instance_Module (Inst : Synth_Instance_Acc) return Module;
pragma Inline (Get_Instance_Module);
-- Each base instance creates bit0 and bit1, which are used for control
-- flow.
function Get_Inst_Bit0 (Inst : Synth_Instance_Acc) return Net;
function Get_Inst_Bit1 (Inst : Synth_Instance_Acc) return Net;
pragma Inline (Get_Inst_Bit0, Get_Inst_Bit1);
-- Start the definition of module M (using INST).
procedure Set_Instance_Module (Inst : Synth_Instance_Acc; M : Module);
function Get_Instance_Const (Inst : Synth_Instance_Acc) return Boolean;
procedure Set_Instance_Const (Inst : Synth_Instance_Acc; Val : Boolean);
procedure Create_Object
(Syn_Inst : Synth_Instance_Acc; Decl : Node; Val : Value_Acc);
procedure Create_Package_Object
(Syn_Inst : Synth_Instance_Acc; Decl : Node; Val : Value_Acc);
-- Force the value of DECL, without checking for elaboration order.
-- It is for deferred constants.
procedure Create_Object_Force
(Syn_Inst : Synth_Instance_Acc; Decl : Node; Val : Value_Acc);
procedure Destroy_Object
(Syn_Inst : Synth_Instance_Acc; Decl : Node);
-- Build the value for object OBJ.
-- KIND must be Wire_Variable or Wire_Signal.
procedure Create_Wire_Object (Syn_Inst : Synth_Instance_Acc;
Kind : Wire_Kind;
Obj : Node);
-- Get the value of OBJ.
function Get_Value (Syn_Inst : Synth_Instance_Acc; Obj : Node)
return Value_Acc;
-- Wrapper around Get_Value for types.
function Get_Value_Type (Syn_Inst : Synth_Instance_Acc; Atype : Node)
return Type_Acc;
-- Get a net from a scalar/vector value. This will automatically create
-- a net for literals.
function Get_Net (Val : Value_Acc) return Net;
function Create_Value_Instance (Inst : Synth_Instance_Acc)
return Value_Acc;
private
type Objects_Array is array (Object_Slot_Type range <>) of Value_Acc;
type Base_Instance_Type is limited record
Builder : Netlists.Builders.Context_Acc;
Top_Module : Module;
Cur_Module : Module;
Bit0 : Net;
Bit1 : Net;
end record;
type Base_Instance_Acc is access Base_Instance_Type;
type Synth_Instance_Type (Max_Objs : Object_Slot_Type) is limited record
Is_Const : Boolean;
Base : Base_Instance_Acc;
-- Name prefix for declarations.
Name : Sname;
-- The corresponding info for this instance.
Block_Scope : Sim_Info_Acc;
-- Parent instance.
Up_Block : Synth_Instance_Acc;
Elab_Objects : Object_Slot_Type;
-- Instance for synthesis.
Objects : Objects_Array (1 .. Max_Objs);
end record;
end Synth.Context;
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