-- Elaboration -- 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.Text_IO; with Types; use Types; with Errorout; use Errorout; with Execution; use Execution; with Simulation; use Simulation; with Iirs_Utils; use Iirs_Utils; with Libraries; with Name_Table; with File_Operation; with Debugger; use Debugger; with Iir_Chains; use Iir_Chains; with Grt.Types; use Grt.Types; with Simulation.AMS; use Simulation.AMS; with Areapools; use Areapools; with Grt.Errors; package body Elaboration is procedure Elaborate_Dependence (Design_Unit: Iir_Design_Unit); procedure Elaborate_Statement_Part (Instance : Block_Instance_Acc; Stmt_Chain: Iir); procedure Elaborate_Type_Definition (Instance : Block_Instance_Acc; Def : Iir); procedure Elaborate_Nature_Definition (Instance : Block_Instance_Acc; Def : Iir); function Elaborate_Default_Value (Instance : Block_Instance_Acc; Decl : Iir) return Iir_Value_Literal_Acc; -- CONF is the block_configuration for components of ARCH. function Elaborate_Architecture (Arch : Iir_Architecture_Body; Conf : Iir_Block_Configuration; Parent_Instance : Block_Instance_Acc; Stmt : Iir; Generic_Map : Iir; Port_Map : Iir) return Block_Instance_Acc; -- Create a new signal, using DEFAULT as initial value. -- Set its number. procedure Elaborate_Signal (Block: Block_Instance_Acc; Signal: Iir; Default : Iir_Value_Literal_Acc) is function Create_Signal (Lit: Iir_Value_Literal_Acc) return Iir_Value_Literal_Acc is Res : Iir_Value_Literal_Acc; begin case Lit.Kind is when Iir_Value_Array => Res := Create_Array_Value (Lit.Val_Array.Len, Lit.Bounds.Nbr_Dims); Res.Bounds.D := Lit.Bounds.D; Res := Unshare_Bounds (Res, Global_Pool'Access); for I in Lit.Val_Array.V'Range loop Res.Val_Array.V (I) := Create_Signal (Lit.Val_Array.V (I)); end loop; when Iir_Value_Record => Res := Create_Record_Value (Lit.Val_Record.Len, Instance_Pool); for I in Lit.Val_Record.V'Range loop Res.Val_Record.V (I) := Create_Signal (Lit.Val_Record.V (I)); end loop; when Iir_Value_I64 | Iir_Value_F64 | Iir_Value_B1 | Iir_Value_E32 => Res := Create_Signal_Value (null); when Iir_Value_Signal | Iir_Value_Range | Iir_Value_File | Iir_Value_Access | Iir_Value_Protected | Iir_Value_Quantity | Iir_Value_Terminal => raise Internal_Error; end case; return Res; end Create_Signal; Sig : Iir_Value_Literal_Acc; Def : Iir_Value_Literal_Acc; Slot : constant Object_Slot_Type := Get_Info (Signal).Slot; begin Sig := Create_Signal (Default); Def := Unshare (Default, Global_Pool'Access); Block.Objects (Slot) := Sig; Block.Objects (Slot + 1) := Def; Signals_Table.Append ((Kind => User_Signal, Decl => Signal, Sig => Sig, Val => Def, Instance => Block)); end Elaborate_Signal; function Execute_Time_Attribute (Instance : Block_Instance_Acc; Attr : Iir) return Ghdl_I64 is Param : constant Iir := Get_Parameter (Attr); Res : Ghdl_I64; Val : Iir_Value_Literal_Acc; begin if Param = Null_Iir then Res := 0; else Val := Execute_Expression (Instance, Param); Res := Val.I64; end if; return Res; end Execute_Time_Attribute; procedure Elaborate_Implicit_Signal (Instance: Block_Instance_Acc; Signal: Iir; Kind : Signal_Type_Kind) is Info : constant Sim_Info_Acc := Get_Info (Signal); Prefix : Iir_Value_Literal_Acc; T : Ghdl_I64; Sig : Iir_Value_Literal_Acc; Init : Iir_Value_Literal_Acc; begin if Kind = Implicit_Transaction then T := 0; Init := Create_B1_Value (False); else T := Execute_Time_Attribute (Instance, Signal); Init := Create_B1_Value (False); end if; Sig := Create_Signal_Value (null); Init := Unshare (Init, Global_Pool'Access); Instance.Objects (Info.Slot) := Sig; Instance.Objects (Info.Slot + 1) := Init; Prefix := Execute_Name (Instance, Get_Prefix (Signal), True); Prefix := Unshare_Bounds (Prefix, Global_Pool'Access); case Kind is when Implicit_Stable => Signals_Table.Append ((Kind => Implicit_Stable, Decl => Signal, Sig => Sig, Val => Init, Instance => Instance, Time => T, Prefix => Prefix)); when Implicit_Quiet => Signals_Table.Append ((Kind => Implicit_Quiet, Decl => Signal, Sig => Sig, Val => Init, Instance => Instance, Time => T, Prefix => Prefix)); when Implicit_Transaction => Signals_Table.Append ((Kind => Implicit_Transaction, Decl => Signal, Sig => Sig, Val => Init, Instance => Instance, Time => 0, Prefix => Prefix)); when others => raise Internal_Error; end case; end Elaborate_Implicit_Signal; function Create_Delayed_Signal (Pfx : Iir_Value_Literal_Acc) return Iir_Value_Literal_Acc is Res : Iir_Value_Literal_Acc; begin case Pfx.Kind is when Iir_Value_Array => Res := Create_Array_Value (Pfx.Val_Array.Len, Pfx.Bounds.Nbr_Dims, Global_Pool'Access); Res.Bounds.D := Pfx.Bounds.D; for I in Pfx.Val_Array.V'Range loop Res.Val_Array.V (I) := Create_Delayed_Signal (Pfx.Val_Array.V (I)); end loop; when Iir_Value_Record => Res := Create_Record_Value (Pfx.Val_Record.Len, Global_Pool'Access); for I in Pfx.Val_Record.V'Range loop Res.Val_Record.V (I) := Create_Delayed_Signal (Pfx.Val_Record.V (I)); end loop; when Iir_Value_Signal => Res := Create_Signal_Value (null); when others => raise Internal_Error; end case; return Res; end Create_Delayed_Signal; procedure Elaborate_Delayed_Signal (Instance: Block_Instance_Acc; Signal: Iir) is Info : constant Sim_Info_Acc := Get_Info (Signal); Prefix : Iir_Value_Literal_Acc; Sig : Iir_Value_Literal_Acc; Init : Iir_Value_Literal_Acc; T : Ghdl_I64; begin Prefix := Execute_Name (Instance, Get_Prefix (Signal), True); Prefix := Unshare_Bounds (Prefix, Global_Pool'Access); T := Execute_Time_Attribute (Instance, Signal); Sig := Create_Delayed_Signal (Prefix); Instance.Objects (Info.Slot) := Sig; Init := Execute_Signal_Init_Value (Instance, Get_Prefix (Signal)); Init := Unshare_Bounds (Init, Global_Pool'Access); Instance.Objects (Info.Slot + 1) := Init; Signals_Table.Append ((Kind => Implicit_Delayed, Decl => Signal, Sig => Sig, Val => Init, Instance => Instance, Time => T, Prefix => Prefix)); end Elaborate_Delayed_Signal; procedure Elaborate_Package (Decl: Iir) is Package_Info : constant Sim_Info_Acc := Get_Info (Decl); Instance : Block_Instance_Acc; begin Instance := new Block_Instance_Type' (Max_Objs => Package_Info.Nbr_Objects, Block_Scope => Package_Info.Frame_Scope, Up_Block => null, Label => Decl, Stmt => Null_Iir, Parent => null, Children => null, Brother => null, Marker => Empty_Marker, Objects => (others => null), Elab_Objects => 0, In_Wait_Flag => False, Actuals_Ref => null, Result => null); Package_Instances (Package_Info.Frame_Scope.Pkg_Index) := Instance; if Trace_Elaboration then Ada.Text_IO.Put_Line ("elaborating " & Disp_Node (Decl)); end if; -- Elaborate objects declarations. Elaborate_Declarative_Part (Instance, Get_Declaration_Chain (Decl)); end Elaborate_Package; procedure Elaborate_Package_Body (Decl: Iir) is Package_Info : constant Sim_Info_Acc := Get_Info (Decl); Instance : Block_Instance_Acc; begin Instance := Package_Instances (Package_Info.Frame_Scope.Pkg_Index); if Trace_Elaboration then Ada.Text_IO.Put_Line ("elaborating " & Disp_Node (Decl)); end if; -- Elaborate objects declarations. Elaborate_Declarative_Part (Instance, Get_Declaration_Chain (Decl)); end Elaborate_Package_Body; -- Elaborate all packages which DESIGN_UNIT depends on. -- The packages are elaborated only once. The body, if the package needs -- one, can be loaded during the elaboration. -- Recursive function. -- FIXME: handle pathological cases of recursion. -- Due to the rules of analysis, it is not possible to have a circulare -- dependence. procedure Elaborate_Dependence (Design_Unit: Iir_Design_Unit) is Depend_List: Iir_Design_Unit_List; Design: Iir; Library_Unit: Iir; begin Depend_List := Get_Dependence_List (Design_Unit); for I in Natural loop Design := Get_Nth_Element (Depend_List, I); exit when Design = Null_Iir; if Get_Kind (Design) = Iir_Kind_Entity_Aspect_Entity then -- During Sem, the architecture may be still unknown, and the -- dependency is therefore the aspect. Library_Unit := Get_Architecture (Design); Design := Get_Design_Unit (Library_Unit); else Library_Unit := Get_Library_Unit (Design); end if; -- Elaborates only non-elaborated packages. case Get_Kind (Library_Unit) is when Iir_Kind_Package_Declaration => declare Info : constant Sim_Info_Acc := Get_Info (Library_Unit); Body_Design: Iir_Design_Unit; begin if Package_Instances (Info.Frame_Scope.Pkg_Index) = null then -- Package not yet elaborated. -- Load the body now, as it can add objects in the -- package instance. Body_Design := Libraries.Load_Secondary_Unit (Design, Null_Identifier, Design_Unit); -- First the packages on which DESIGN depends. Elaborate_Dependence (Design); -- Then the declaration. Elaborate_Package (Library_Unit); -- And then the body (if any). if Body_Design = Null_Iir then if Get_Need_Body (Library_Unit) then Error_Msg_Elab ("no package body for `" & Image_Identifier (Library_Unit) & '''); end if; else -- Note: the body can elaborate some packages. Elaborate_Dependence (Body_Design); Elaborate_Package_Body (Get_Library_Unit (Body_Design)); end if; end if; end; when Iir_Kind_Entity_Declaration | Iir_Kind_Configuration_Declaration | Iir_Kind_Architecture_Body => Elaborate_Dependence (Design); when others => Error_Kind ("elaborate_dependence", Library_Unit); end case; end loop; end Elaborate_Dependence; -- Create a block instance to instantiate OBJ (block, component, -- architecture, generate) in FATHER. STMT is the statement/declaration -- at the origin of the instantiation (it is generally the same as OBJ, -- except for component where STMT is the component instantation -- statement). function Create_Block_Instance (Father : Block_Instance_Acc; Obj : Iir; Stmt : Iir) return Block_Instance_Acc is Obj_Info : constant Sim_Info_Acc := Get_Info (Obj); Res : Block_Instance_Acc; begin Res := new Block_Instance_Type' (Max_Objs => Obj_Info.Nbr_Objects, Block_Scope => Obj_Info.Frame_Scope, Up_Block => Father, Label => Stmt, Stmt => Obj, Parent => Father, Children => null, Brother => null, Marker => Empty_Marker, Objects => (others => null), Elab_Objects => 0, In_Wait_Flag => False, Actuals_Ref => null, Result => null); if Father /= null then Res.Brother := Father.Children; Father.Children := Res; end if; return Res; end Create_Block_Instance; function Create_Protected_Object (Block: Block_Instance_Acc; Decl: Iir) return Iir_Value_Literal_Acc is Bod : constant Iir := Get_Protected_Type_Body (Decl); Inst : Block_Instance_Acc; Res : Iir_Value_Literal_Acc; begin Protected_Table.Increment_Last; Res := Create_Protected_Value (Protected_Table.Last); Inst := Create_Subprogram_Instance (Block, Bod); Protected_Table.Table (Res.Prot) := Inst; -- Temporary put the instancce on the stack in case of function calls -- during the elaboration of the protected object. Current_Process.Instance := Inst; Elaborate_Declarative_Part (Inst, Get_Declaration_Chain (Bod)); Current_Process.Instance := Block; return Res; end Create_Protected_Object; -- Create an value_literal for DECL (defined in BLOCK) and set it with -- its default values. Nodes are shared. function Create_Value_For_Type (Block: Block_Instance_Acc; Decl: Iir; Default : Boolean) return Iir_Value_Literal_Acc is Res : Iir_Value_Literal_Acc; Bounds : Iir_Value_Literal_Acc; begin case Get_Kind (Decl) is when Iir_Kind_Integer_Subtype_Definition | Iir_Kind_Integer_Type_Definition | Iir_Kind_Enumeration_Type_Definition | Iir_Kind_Enumeration_Subtype_Definition | Iir_Kind_Floating_Subtype_Definition | Iir_Kind_Floating_Type_Definition | Iir_Kind_Physical_Subtype_Definition | Iir_Kind_Physical_Type_Definition => if Default then Bounds := Execute_Bounds (Block, Decl); Res := Bounds.Left; else case Get_Info (Get_Base_Type (Decl)).Scalar_Mode is when Iir_Value_B1 => Res := Create_B1_Value (False); when Iir_Value_E32 => Res := Create_E32_Value (0); when Iir_Value_I64 => Res := Create_I64_Value (0); when Iir_Value_F64 => Res := Create_F64_Value (0.0); when others => raise Internal_Error; end case; end if; when Iir_Kind_Array_Subtype_Definition => Res := Create_Array_Bounds_From_Type (Block, Decl, True); declare El : Iir_Value_Literal_Acc; begin if Res.Val_Array.Len > 0 then El := Create_Value_For_Type (Block, Get_Element_Subtype (Decl), Default); Res.Val_Array.V (1) := El; for I in 2 .. Res.Val_Array.Len loop Res.Val_Array.V (I) := El; end loop; end if; end; when Iir_Kind_Record_Type_Definition | Iir_Kind_Record_Subtype_Definition => declare El : Iir_Element_Declaration; List : constant Iir_List := Get_Elements_Declaration_List (Get_Base_Type (Decl)); begin Res := Create_Record_Value (Iir_Index32 (Get_Nbr_Elements (List))); for I in Natural loop El := Get_Nth_Element (List, I); exit when El = Null_Iir; Res.Val_Record.V (1 + Get_Element_Position (El)) := Create_Value_For_Type (Block, Get_Type (El), Default); end loop; end; when Iir_Kind_Access_Type_Definition | Iir_Kind_Access_Subtype_Definition => return Create_Access_Value (null); when Iir_Kind_Protected_Type_Declaration => return Create_Protected_Object (Block, Decl); when others => Error_Kind ("create_value_for_type", Decl); end case; return Res; end Create_Value_For_Type; procedure Create_Object (Instance : Block_Instance_Acc; Decl : Iir) is Slot : constant Object_Slot_Type := Get_Info (Decl).Slot; begin -- Check elaboration order. -- Note: this is not done for package since objects from package are -- commons (same scope), and package annotation order can be different -- from package elaboration order (eg: body). if Slot /= Instance.Elab_Objects + 1 or else Instance.Objects (Slot) /= null then Error_Msg_Elab ("bad elaboration order"); raise Internal_Error; end if; Instance.Elab_Objects := Slot; end Create_Object; procedure Destroy_Object (Instance : Block_Instance_Acc; Decl : Iir) is Info : constant Sim_Info_Acc := Get_Info (Decl); Slot : constant Object_Slot_Type := Info.Slot; begin if Slot /= Instance.Elab_Objects or else Info.Obj_Scope /= Instance.Block_Scope then Error_Msg_Elab ("bad destroy order"); raise Internal_Error; end if; -- Clear the slot (this is necessary for ranges). Instance.Objects (Slot) := null; Instance.Elab_Objects := Slot - 1; end Destroy_Object; procedure Create_Signal (Instance : Block_Instance_Acc; Decl : Iir) is Slot : constant Object_Slot_Type := Get_Info (Decl).Slot; begin if Slot /= Instance.Elab_Objects + 1 or else Instance.Objects (Slot) /= null then Error_Msg_Elab ("bad elaboration order"); raise Internal_Error; end if; -- One slot is reserved for default value Instance.Elab_Objects := Slot + 1; end Create_Signal; function Create_Terminal_Object (Block: Block_Instance_Acc; Decl : Iir; Def: Iir) return Iir_Value_Literal_Acc is Res : Iir_Value_Literal_Acc; begin case Get_Kind (Def) is when Iir_Kind_Scalar_Nature_Definition => Res := Create_Terminal_Value (Create_Scalar_Terminal (Decl, Block)); when others => Error_Kind ("create_terminal_object", Def); end case; return Res; end Create_Terminal_Object; procedure Create_Terminal (Instance : Block_Instance_Acc; Decl : Iir) is Slot : constant Object_Slot_Type := Get_Info (Decl).Slot; begin if Slot + 1 = Instance.Elab_Objects then -- Reference terminal of nature declaration may have already been -- elaborated. return; end if; if Slot /= Instance.Elab_Objects then Error_Msg_Elab ("bad elaboration order"); raise Internal_Error; end if; Instance.Objects (Slot) := Create_Terminal_Object (Instance, Decl, Get_Nature (Decl)); Instance.Elab_Objects := Slot + 1; end Create_Terminal; function Create_Quantity_Object (Block: Block_Instance_Acc; Decl : Iir; Def: Iir) return Iir_Value_Literal_Acc is Res : Iir_Value_Literal_Acc; Kind : Quantity_Kind; begin case Get_Kind (Def) is when Iir_Kind_Floating_Type_Definition | Iir_Kind_Floating_Subtype_Definition => case Iir_Kinds_Quantity_Declaration (Get_Kind (Decl)) is when Iir_Kind_Across_Quantity_Declaration => Kind := Quantity_Across; when Iir_Kind_Through_Quantity_Declaration => Kind := Quantity_Through; when Iir_Kind_Free_Quantity_Declaration => Kind := Quantity_Free; end case; Res := Create_Quantity_Value (Create_Scalar_Quantity (Kind, Decl, Block)); when others => Error_Kind ("create_quantity_object", Def); end case; return Res; end Create_Quantity_Object; function Create_Quantity (Instance : Block_Instance_Acc; Decl : Iir) return Iir_Value_Literal_Acc is Slot : constant Object_Slot_Type := Get_Info (Decl).Slot; Res : Iir_Value_Literal_Acc; begin if Slot /= Instance.Elab_Objects then Error_Msg_Elab ("bad elaboration order"); raise Internal_Error; end if; Res := Create_Quantity_Object (Instance, Decl, Get_Type (Decl)); Instance.Objects (Slot) := Res; Instance.Elab_Objects := Slot + 1; return Res; end Create_Quantity; function Elaborate_Bound_Constraint (Instance : Block_Instance_Acc; Bound: Iir) return Iir_Value_Literal_Acc is Value : Iir_Value_Literal_Acc; Ref : constant Iir := Get_Type (Bound); Res : Iir_Value_Literal_Acc; begin Res := Create_Value_For_Type (Instance, Ref, False); Res := Unshare (Res, Instance_Pool); Value := Execute_Expression (Instance, Bound); Assign_Value_To_Object (Instance, Res, Ref, Value, Bound); return Res; end Elaborate_Bound_Constraint; procedure Elaborate_Range_Expression (Instance : Block_Instance_Acc; Rc: Iir_Range_Expression) is Range_Info : constant Sim_Info_Acc := Get_Info (Rc); Val : Iir_Value_Literal_Acc; begin if Range_Info.Obj_Scope /= Instance.Block_Scope or else Instance.Objects (Range_Info.Slot) /= null then -- A range expression may have already been created, for example -- when severals objects are created with the same subtype: -- variable v, v1 : bit_vector (x to y); return; end if; if False and then (Range_Info.Obj_Scope /= Instance.Block_Scope or else Range_Info.Slot < Instance.Elab_Objects) then -- FIXME: the test is wrong for packages. -- The range was already elaborated. -- ?? Is that possible raise Internal_Error; return; end if; Create_Object (Instance, Rc); Val := Create_Range_Value (Elaborate_Bound_Constraint (Instance, Get_Left_Limit (Rc)), Elaborate_Bound_Constraint (Instance, Get_Right_Limit (Rc)), Get_Direction (Rc)); Instance.Objects (Range_Info.Slot) := Unshare (Val, Instance_Pool); end Elaborate_Range_Expression; procedure Elaborate_Range_Constraint (Instance : Block_Instance_Acc; Rc: Iir) is begin case Get_Kind (Rc) is when Iir_Kind_Range_Expression => Elaborate_Range_Expression (Instance, Rc); when Iir_Kind_Range_Array_Attribute | Iir_Kind_Reverse_Range_Array_Attribute => null; when others => Error_Kind ("elaborate_range_constraint", Rc); end case; end Elaborate_Range_Constraint; -- Create the bounds of a scalar type definition. -- Elaborate_Range_Constraint cannot be used, as it checks bounds (and -- here we create the bounds). procedure Elaborate_Type_Range (Instance : Block_Instance_Acc; Rc: Iir_Range_Expression) is Range_Info : Sim_Info_Acc; Val : Iir_Value_Literal_Acc; begin Range_Info := Get_Info (Rc); Create_Object (Instance, Rc); Val := Create_Range_Value (Execute_Expression (Instance, Get_Left_Limit (Rc)), Execute_Expression (Instance, Get_Right_Limit (Rc)), Get_Direction (Rc)); Instance.Objects (Range_Info.Slot) := Unshare (Val, Instance_Pool); end Elaborate_Type_Range; -- DECL is a subtype indication. -- Elaborate DECL only if it is anonymous. procedure Elaborate_Subtype_Indication_If_Anonymous (Instance : Block_Instance_Acc; Decl : Iir) is begin if Is_Anonymous_Type_Definition (Decl) then Elaborate_Subtype_Indication (Instance, Decl); end if; end Elaborate_Subtype_Indication_If_Anonymous; -- LRM93 §12.3.1.3 Subtype Declarations -- The elaboration of a subtype indication creates a subtype. procedure Elaborate_Subtype_Indication (Instance : Block_Instance_Acc; Ind : Iir) is begin case Get_Kind (Ind) is when Iir_Kind_Enumeration_Type_Definition | Iir_Kind_Array_Type_Definition | Iir_Kind_File_Type_Definition | Iir_Kind_Access_Type_Definition | Iir_Kind_Record_Type_Definition => Elaborate_Type_Definition (Instance, Ind); when Iir_Kind_Array_Subtype_Definition => -- LRM93 12.3.1.3 -- The elaboration of an index constraint consists of the -- declaration of each of the discrete ranges in the index -- constraint in some order that is not defined by the language. declare St_Indexes : constant Iir_List := Get_Index_Subtype_List (Ind); St_El : Iir; begin for I in Natural loop St_El := Get_Index_Type (St_Indexes, I); exit when St_El = Null_Iir; Elaborate_Subtype_Indication_If_Anonymous (Instance, St_El); end loop; Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Element_Subtype (Ind)); end; when Iir_Kind_Record_Subtype_Definition => null; when Iir_Kind_Access_Subtype_Definition => null; when Iir_Kind_Integer_Subtype_Definition | Iir_Kind_Floating_Subtype_Definition | Iir_Kind_Enumeration_Subtype_Definition => Elaborate_Range_Constraint (Instance, Get_Range_Constraint (Ind)); when Iir_Kind_Physical_Subtype_Definition => Elaborate_Range_Constraint (Instance, Get_Range_Constraint (Ind)); when others => Error_Kind ("elaborate_subtype_indication", Ind); end case; end Elaborate_Subtype_Indication; -- LRM93 §12.3.1.2 Type Declarations. procedure Elaborate_Type_Definition (Instance : Block_Instance_Acc; Def : Iir) is begin case Get_Kind (Def) is when Iir_Kind_Enumeration_Type_Definition => -- Elaboration of an enumeration type definition has not effect -- other than the creation of the corresponding type. Elaborate_Type_Range (Instance, Get_Range_Constraint (Def)); when Iir_Kind_Integer_Type_Definition | Iir_Kind_Floating_Type_Definition | Iir_Kind_Physical_Type_Definition => null; when Iir_Kind_Integer_Subtype_Definition | Iir_Kind_Floating_Subtype_Definition | Iir_Kind_Physical_Subtype_Definition => -- Elaboration of an integer, floating point, or physical type -- definition consists of the elaboration of the corresponding -- range constraint. Elaborate_Subtype_Indication_If_Anonymous (Instance, Def); -- Elaboration of a physical unit declaration has no effect other -- than to create the unit defined by the unit declaration. null; when Iir_Kind_Array_Type_Definition => -- Elaboration of an unconstrained array type definition consists -- of the elaboration of the element subtype indication of the -- array type. Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Element_Subtype (Def)); when Iir_Kind_Access_Type_Definition => -- Elaboration of an access type definition consists of the -- elaboration of the corresponding subtype indication. Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Designated_Type (Def)); when Iir_Kind_File_Type_Definition => -- GHDL: There is nothing about elaboration of a file type -- definition. FIXME ?? null; when Iir_Kind_Record_Type_Definition => -- Elaboration of a record type definition consists of the -- elaboration of the equivalent single element declarations in -- the given order. declare El : Iir_Element_Declaration; List : Iir_List; begin List := Get_Elements_Declaration_List (Def); for I in Natural loop El := Get_Nth_Element (List, I); exit when El = Null_Iir; -- Elaboration of an element declaration consists of -- elaboration of the element subtype indication. Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Type (El)); end loop; end; when Iir_Kind_Protected_Type_Declaration => Elaborate_Declarative_Part (Instance, Get_Declaration_Chain (Def)); when Iir_Kind_Incomplete_Type_Definition => null; when others => Error_Kind ("elaborate_type_definition", Def); end case; end Elaborate_Type_Definition; -- LRM93 §12.3.1.2 Type Declarations. procedure Elaborate_Type_Declaration (Instance : Block_Instance_Acc; Decl : Iir_Type_Declaration) is Def : Iir; Base_Type : Iir_Array_Type_Definition; begin -- Elaboration of a type declaration generally consists of the -- elaboration of the definition of the type and the creation of that -- type. Def := Get_Type_Definition (Decl); if Def = Null_Iir then -- FIXME: can this happen ? raise Program_Error; end if; if Get_Kind (Def) = Iir_Kind_Array_Subtype_Definition then Base_Type := Get_Base_Type (Def); -- For a constrained array type declaration, however, -- elaboration consists of the elaboration of the equivalent -- anonymous unconstrained array type [...] Elaborate_Subtype_Indication_If_Anonymous (Instance, Base_Type); -- [...] followed by the elaboration of the named subtype -- of that unconstrained type. Elaborate_Subtype_Indication (Instance, Def); else Elaborate_Type_Definition (Instance, Def); end if; end Elaborate_Type_Declaration; procedure Elaborate_Nature_Definition (Instance : Block_Instance_Acc; Def : Iir) is begin case Get_Kind (Def) is when Iir_Kind_Scalar_Nature_Definition => Elaborate_Subtype_Indication (Instance, Get_Across_Type (Def)); Elaborate_Subtype_Indication (Instance, Get_Through_Type (Def)); when others => Error_Kind ("elaborate_nature_definition", Def); end case; end Elaborate_Nature_Definition; -- LRM93 §12.2.1 The Generic Clause procedure Elaborate_Generic_Clause (Instance : Block_Instance_Acc; Generic_Chain : Iir) is Decl : Iir_Interface_Constant_Declaration; begin -- Elaboration of a generic clause consists of the elaboration of each -- of the equivalent single generic declarations contained in the -- clause, in the order given. Decl := Generic_Chain; while Decl /= Null_Iir loop -- The elaboration of a generic declaration consists of elaborating -- the subtype indication and then creating a generic constant of -- that subtype. Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Type (Decl)); Create_Object (Instance, Decl); -- The value of a generic constant is not defined until a subsequent -- generic map aspect is evaluated, or in the absence of a generic -- map aspect, until the default expression associated with the -- generic constant is evaluated to determine the value of the -- constant. Decl := Get_Chain (Decl); end loop; end Elaborate_Generic_Clause; -- LRM93 12.2.3 The Port Clause procedure Elaborate_Port_Clause (Instance : Block_Instance_Acc; Port_Chain : Iir) is Decl : Iir_Interface_Signal_Declaration; begin Decl := Port_Chain; while Decl /= Null_Iir loop -- LRM93 §12.2.3 -- The elaboration of a port declaration consists of elaborating the -- subtype indication and then creating a port of that subtype. Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Type (Decl)); -- Simply increase an index to check that the port was created. Create_Signal (Instance, Decl); Decl := Get_Chain (Decl); end loop; end Elaborate_Port_Clause; -- LRM93 §12.2.2 The generic Map Aspect procedure Elaborate_Generic_Map_Aspect (Target_Instance : Block_Instance_Acc; Local_Instance : Block_Instance_Acc; Map : Iir) is Assoc : Iir; Inter : Iir_Interface_Constant_Declaration; Value : Iir; Val : Iir_Value_Literal_Acc; Last_Individual : Iir_Value_Literal_Acc; begin -- Elaboration of a generic map aspect consists of elaborating the -- generic association list. -- Elaboration of a generic association list consists of the -- elaboration of each generic association element in the -- association list. Assoc := Map; while Assoc /= Null_Iir loop -- Elaboration of a generic association element consists of the -- elaboration of the formal part and the evaluation of the actual -- part. -- FIXME: elaboration of the formal part. Inter := Get_Association_Interface (Assoc); case Get_Kind (Assoc) is when Iir_Kind_Association_Element_Open => -- The generic association list contains an implicit -- association element for each generic constant that is not -- explicitly associated with an actual [GHDL: done trought -- annotations] or that is associated with the reserved word -- OPEN; the actual part of such an implicit association -- element is the default expression appearing in the -- declaration of that generic constant. Value := Get_Default_Value (Inter); if Value = Null_Iir then Error_Msg_Exec ("no default value", Inter); return; end if; Val := Execute_Expression (Target_Instance, Value); when Iir_Kind_Association_Element_By_Expression => Value := Get_Actual (Assoc); Val := Execute_Expression (Local_Instance, Value); when Iir_Kind_Association_Element_By_Individual => Val := Create_Value_For_Type (Local_Instance, Get_Actual_Type (Assoc), False); Last_Individual := Unshare (Val, Instance_Pool); Target_Instance.Objects (Get_Info (Inter).Slot) := Last_Individual; goto Continue; when others => Error_Kind ("elaborate_generic_map_aspect", Assoc); end case; if Get_Whole_Association_Flag (Assoc) then -- It is an error if the value of the actual does not belong to -- the subtype denoted by the subtype indication of the formal. -- If the subtype denoted by the subtype indication of the -- declaration of the formal is a constrained array subtype, then -- an implicit subtype conversion is performed prior to this -- check. -- It is also an error if the type of the formal is an array type -- and the value of each element of the actual does not belong to -- the element subtype of the formal. Implicit_Array_Conversion (Target_Instance, Val, Get_Type (Inter), Inter); Check_Constraints (Target_Instance, Val, Get_Type (Inter), Inter); -- The generic constant or subelement or slice thereof designated -- by the formal part is then initialized with the value -- resulting from the evaluation of the corresponding actual part. Target_Instance.Objects (Get_Info (Inter).Slot) := Unshare (Val, Instance_Pool); else declare Targ : Iir_Value_Literal_Acc; Is_Sig : Boolean; begin Execute_Name_With_Base (Target_Instance, Get_Formal (Assoc), Last_Individual, Targ, Is_Sig); Store (Targ, Val); end; end if; <> null; Assoc := Get_Chain (Assoc); end loop; end Elaborate_Generic_Map_Aspect; -- LRM93 12.2.3 The Port Clause procedure Elaborate_Port_Declaration (Instance : Block_Instance_Acc; Decl : Iir_Interface_Signal_Declaration; Default_Value : Iir_Value_Literal_Acc) is Val : Iir_Value_Literal_Acc; begin if Default_Value = null then Val := Elaborate_Default_Value (Instance, Decl); else Val := Default_Value; end if; Elaborate_Signal (Instance, Decl, Val); end Elaborate_Port_Declaration; procedure Elab_Connect (Formal_Instance : Block_Instance_Acc; Local_Instance : Block_Instance_Acc; Actual_Expr : Iir_Value_Literal_Acc; Assoc : Iir_Association_Element_By_Expression) is Inter : Iir; Actual : Iir; Local_Expr : Iir_Value_Literal_Acc; Formal_Expr : Iir_Value_Literal_Acc; begin Inter := Get_Formal (Assoc); Actual := Get_Actual (Assoc); Formal_Expr := Execute_Name (Formal_Instance, Inter, True); Formal_Expr := Unshare_Bounds (Formal_Expr, Global_Pool'Access); if Actual_Expr = null then Local_Expr := Execute_Name (Local_Instance, Actual, True); Local_Expr := Unshare_Bounds (Local_Expr, Global_Pool'Access); else Local_Expr := Actual_Expr; end if; Connect_Table.Append ((Formal => Formal_Expr, Formal_Instance => Formal_Instance, Actual => Local_Expr, Actual_Instance => Local_Instance, Assoc => Assoc)); end Elab_Connect; -- LRM93 12.2.3 The Port Clause -- LRM93 §12.2.4 The Port Map Aspect procedure Elaborate_Port_Map_Aspect (Formal_Instance : Block_Instance_Acc; Actual_Instance : Block_Instance_Acc; Ports : Iir; Map : Iir) is Assoc : Iir; Inter : Iir_Interface_Signal_Declaration; Actual_Expr : Iir_Value_Literal_Acc; Init_Expr : Iir_Value_Literal_Acc; Actual : Iir; begin if Ports = Null_Iir then return; end if; -- Elaboration of a port map aspect consists of elaborating the port -- association list. if Map = Null_Iir then -- No port association, elaborate the port clause. -- Elaboration of a port clause consists of the elaboration of each -- of the equivalent signal port declaration in the clause, in the -- order given. Inter := Ports; while Inter /= Null_Iir loop Elaborate_Port_Declaration (Formal_Instance, Inter, null); Inter := Get_Chain (Inter); end loop; return; end if; Assoc := Map; while Assoc /= Null_Iir loop -- Elaboration of a port association list consists of the elaboration -- of each port association element in the association list whose -- actual is not the reserved word OPEN. Inter := Get_Association_Interface (Assoc); case Get_Kind (Assoc) is when Iir_Kind_Association_Element_By_Expression => if Get_In_Conversion (Assoc) = Null_Iir and then Get_Out_Conversion (Assoc) = Null_Iir then Actual := Get_Actual (Assoc); if Is_Signal_Name (Actual) then -- Association with a signal Init_Expr := Execute_Signal_Init_Value (Actual_Instance, Actual); Implicit_Array_Conversion (Formal_Instance, Init_Expr, Get_Type (Inter), Actual); Init_Expr := Unshare_Bounds (Init_Expr, Global_Pool'Access); Actual_Expr := null; else -- Association with an expression Init_Expr := Execute_Expression (Actual_Instance, Actual); Implicit_Array_Conversion (Formal_Instance, Init_Expr, Get_Type (Inter), Actual); Init_Expr := Unshare (Init_Expr, Global_Pool'Access); Actual_Expr := Init_Expr; end if; else -- The actual doesn't define the constraints of the formal. if Get_Whole_Association_Flag (Assoc) then Init_Expr := Elaborate_Default_Value (Formal_Instance, Inter); Actual_Expr := null; end if; end if; if Get_Whole_Association_Flag (Assoc) and then Get_Collapse_Signal_Flag (Assoc) then declare Slot : constant Object_Slot_Type := Get_Info (Inter).Slot; Actual_Sig : Iir_Value_Literal_Acc; begin Actual_Sig := Execute_Name (Actual_Instance, Actual, True); Implicit_Array_Conversion (Formal_Instance, Actual_Sig, Get_Type (Inter), Actual); Formal_Instance.Objects (Slot) := Unshare_Bounds (Actual_Sig, Global_Pool'Access); Formal_Instance.Objects (Slot + 1) := Init_Expr; end; else if Get_Whole_Association_Flag (Assoc) then Elaborate_Signal (Formal_Instance, Inter, Init_Expr); end if; -- Elaboration of a port association element consists of the -- elaboration of the formal part; the port or subelement -- or slice thereof designated by the formal part is then -- associated with the signal or expression designated -- by the actual part. Elab_Connect (Formal_Instance, Actual_Instance, Actual_Expr, Assoc); end if; when Iir_Kind_Association_Element_Open => -- Note that an open cannot be associated with a formal that -- is associated individually. Elaborate_Port_Declaration (Formal_Instance, Inter, null); when Iir_Kind_Association_Element_By_Individual => Init_Expr := Create_Value_For_Type (Formal_Instance, Get_Actual_Type (Assoc), False); Elaborate_Signal (Formal_Instance, Inter, Init_Expr); when others => Error_Kind ("elaborate_port_map_aspect", Assoc); end case; Assoc := Get_Chain (Assoc); end loop; end Elaborate_Port_Map_Aspect; -- LRM93 §12.2 Elaboration of a block header -- Elaboration of a block header consists of the elaboration of the -- generic clause, the generic map aspect, the port clause, and the port -- map aspect, in that order. procedure Elaborate_Block_Header (Instance : Block_Instance_Acc; Header : Iir_Block_Header) is begin Elaborate_Generic_Clause (Instance, Get_Generic_Chain (Header)); Elaborate_Generic_Map_Aspect (Instance, Instance, Get_Generic_Map_Aspect_Chain (Header)); Elaborate_Port_Clause (Instance, Get_Port_Chain (Header)); Elaborate_Port_Map_Aspect (Instance, Instance, Get_Port_Chain (Header), Get_Port_Map_Aspect_Chain (Header)); end Elaborate_Block_Header; procedure Elaborate_Guard_Signal (Instance : Block_Instance_Acc; Guard : Iir) is Sig, Val : Iir_Value_Literal_Acc; Info : constant Sim_Info_Acc := Get_Info (Guard); begin Create_Signal (Instance, Guard); Sig := Create_Signal_Value (null); Val := Unshare (Create_B1_Value (False), Instance_Pool); Instance.Objects (Info.Slot) := Sig; Instance.Objects (Info.Slot + 1) := Val; Signals_Table.Append ((Kind => Guard_Signal, Decl => Guard, Sig => Sig, Val => Val, Instance => Instance)); end Elaborate_Guard_Signal; -- LRM93 §12.4.1 Block statements. procedure Elaborate_Block_Statement (Instance : Block_Instance_Acc; Block : Iir_Block_Statement) is Header : Iir_Block_Header; Ninstance : Block_Instance_Acc; -- FIXME Guard : Iir; begin Ninstance := Create_Block_Instance (Instance, Block, Block); Guard := Get_Guard_Decl (Block); if Guard /= Null_Iir then -- LRM93 12.6.4 (3) -- The value of each implicit GUARD signal is set to the result of -- evaluating the corresponding guard expression. -- GHDL: done by grt when the guard signal is created. Elaborate_Guard_Signal (Ninstance, Guard); end if; -- Elaboration of a block statement consists of the elaboration of the -- block header, if present [...] Header := Get_Block_Header (Block); if Header /= Null_Iir then Elaborate_Block_Header (Ninstance, Header); end if; -- [...] followed by the elaboration of the block declarative part [...] Elaborate_Declarative_Part (Ninstance, Get_Declaration_Chain (Block)); -- [...] followed by the elaboration of the block statement part. Elaborate_Statement_Part (Ninstance, Get_Concurrent_Statement_Chain (Block)); -- Elaboration of a block statement may occur under the control of a -- configuration declaration. -- In particular, a block configuration, wether implicit or explicit, -- within a configuration declaration may supply a sequence of -- additionnal implicit configuration specification to be applied -- during the elaboration of the corresponding block statement. -- If a block statement is being elaborated under the control of a -- configuration declaration, then the sequence of implicit -- configuration specifications supplied by the block configuration -- is elaborated as part of the block declarative part, following all -- other declarative items in that part. -- The sequence of implicit configuration specifications supplied by a -- block configuration, wether implicit or explicit, consists of each of -- the configuration specifications implied by component configurations -- occurring immediatly within the block configuration, and in the -- order in which the component configurations themselves appear. -- FIXME. end Elaborate_Block_Statement; function Create_Default_Association (Formal_Chain : Iir; Local_Chain : Iir; Node : Iir) return Iir is Nbr_Formals : Natural; begin -- LRM93 5.2.2 -- The default binding indication includes a default generic map -- aspect if the design entity implied by the entity aspect contains -- formal generic. -- -- LRM93 5.2.2 -- The default binding indication includes a default port map aspect if -- the design entity implied by the entity aspect contains formal ports. if Formal_Chain = Null_Iir then if Local_Chain /= Null_Iir then Error_Msg_Sem ("cannot create default map aspect", Node); end if; return Null_Iir; end if; Nbr_Formals := Get_Chain_Length (Formal_Chain); declare Assoc_List : Iir_Array (0 .. Nbr_Formals - 1) := (others => Null_Iir); Assoc : Iir; Local : Iir; Formal : Iir; Pos : Natural; First, Last : Iir; begin -- LRM93 5.2.2 -- The default generic map aspect associates each local generic in -- the corresponding component instantiation (if any) with a formal -- of the same simple name. Local := Local_Chain; while Local /= Null_Iir loop Formal := Formal_Chain; Pos := 0; while Formal /= Null_Iir loop exit when Get_Identifier (Formal) = Get_Identifier (Local); Formal := Get_Chain (Formal); Pos := Pos + 1; end loop; if Formal = Null_Iir then -- LRM93 5.2.2 -- It is an error if such a formal does not exist, or if -- its mode and type are not appropriate for such an -- association. -- FIXME: mode/type check. Error_Msg_Sem ("cannot associate local " & Disp_Node (Local), Node); exit; end if; if Assoc_List (Pos) /= Null_Iir then raise Internal_Error; end if; Assoc_List (Pos) := Local; Local := Get_Chain (Local); end loop; Sub_Chain_Init (First, Last); Formal := Formal_Chain; for I in Assoc_List'Range loop if Assoc_List (I) = Null_Iir then -- LRM93 5.2.2 -- Any remaining unassociated formals are associated with the -- actual designator any. Assoc := Create_Iir (Iir_Kind_Association_Element_Open); else Assoc := Create_Iir (Iir_Kind_Association_Element_By_Expression); Set_Actual (Assoc, Assoc_List (I)); end if; Set_Whole_Association_Flag (Assoc, True); Set_Formal (Assoc, Formal); Sub_Chain_Append (First, Last, Assoc); Formal := Get_Chain (Formal); end loop; return First; end; end Create_Default_Association; -- LRM93 §12.4.3 function Is_Fully_Bound (Conf : Iir) return Boolean is Binding : Iir; begin if Conf = Null_Iir then return False; end if; case Get_Kind (Conf) is when Iir_Kind_Configuration_Specification | Iir_Kind_Component_Configuration => Binding := Get_Binding_Indication (Conf); if Binding = Null_Iir then return False; end if; if Get_Kind (Get_Entity_Aspect (Binding)) = Iir_Kind_Entity_Aspect_Open then return False; end if; when others => null; end case; return True; end Is_Fully_Bound; procedure Elaborate_Component_Instantiation (Instance : Block_Instance_Acc; Stmt : Iir_Component_Instantiation_Statement) is Frame : Block_Instance_Acc; begin if Is_Component_Instantiation (Stmt) then declare Component : constant Iir := Get_Named_Entity (Get_Instantiated_Unit (Stmt)); begin -- Elaboration of a component instantiation statement that -- instanciates a component declaration has no effect unless the -- component instance is either fully bound to a design entity -- defined by an entity declaration and architecture body or is -- bound to a configuration of such a design entity. -- FIXME: in fact the component is created. -- If a component instance is so bound, then elaboration of the -- corresponding component instantiation statement consists of the -- elaboration of the implied block statement representing the -- component instance and [...] Frame := Create_Block_Instance (Instance, Component, Stmt); Current_Component := Frame; Elaborate_Generic_Clause (Frame, Get_Generic_Chain (Component)); Elaborate_Generic_Map_Aspect (Frame, Instance, Get_Generic_Map_Aspect_Chain (Stmt)); Elaborate_Port_Clause (Frame, Get_Port_Chain (Component)); Elaborate_Port_Map_Aspect (Frame, Instance, Get_Port_Chain (Component), Get_Port_Map_Aspect_Chain (Stmt)); Current_Component := null; end; else -- Direct instantiation declare Aspect : constant Iir := Get_Instantiated_Unit (Stmt); Arch : Iir; Config : Iir; begin case Get_Kind (Aspect) is when Iir_Kind_Entity_Aspect_Entity => Arch := Get_Architecture (Aspect); if Arch = Null_Iir then Arch := Libraries.Get_Latest_Architecture (Get_Entity (Aspect)); end if; Config := Get_Library_Unit (Get_Default_Configuration_Declaration (Arch)); when Iir_Kind_Entity_Aspect_Configuration => Config := Get_Configuration (Aspect); Arch := Get_Block_Specification (Get_Block_Configuration (Config)); when Iir_Kind_Entity_Aspect_Open => return; when others => raise Internal_Error; end case; Config := Get_Block_Configuration (Config); Frame := Elaborate_Architecture (Arch, Config, Instance, Stmt, Get_Generic_Map_Aspect_Chain (Stmt), Get_Port_Map_Aspect_Chain (Stmt)); end; end if; end Elaborate_Component_Instantiation; -- LRM93 12.4.2 Generate Statements procedure Elaborate_If_Generate_Statement (Instance : Block_Instance_Acc; Generate : Iir_Generate_Statement) is Clause : Iir; Cond : Iir; Bod : Iir; Ninstance : Block_Instance_Acc; Lit : Iir_Value_Literal_Acc; begin -- LRM93 12.4.2 -- For a generate statement with an if generation scheme, elaboration -- consists of the evaluation of the boolean expression, followed by -- the generation of exactly one block statement if the expression -- evaluates to TRUE, and no block statement otherwise. Clause := Generate; while Clause /= Null_Iir loop Cond := Get_Condition (Clause); if Cond /= Null_Iir then Lit := Execute_Expression (Instance, Cond); end if; if Cond = Null_Iir or else Lit.B1 = True then -- LRM93 12.4.2 -- If generated, the block statement has the following form: -- 1. The block label is the same as the label of the generate -- statement. -- 2. The block declarative part consists of a copy of the -- declarative items contained within the generate statement. -- 3. The block statement part consists of a copy of the -- concurrent statement contained within the generate -- statement. Bod := Get_Generate_Statement_Body (Clause); Ninstance := Create_Block_Instance (Instance, Bod, Bod); Elaborate_Declarative_Part (Ninstance, Get_Declaration_Chain (Bod)); Elaborate_Statement_Part (Ninstance, Get_Concurrent_Statement_Chain (Bod)); exit; end if; Clause := Get_Generate_Else_Clause (Clause); end loop; end Elaborate_If_Generate_Statement; -- LRM93 12.4.2 Generate Statements procedure Elaborate_For_Generate_Statement (Instance : Block_Instance_Acc; Generate : Iir_Generate_Statement) is Iter : constant Iir := Get_Parameter_Specification (Generate); Bod : constant Iir := Get_Generate_Statement_Body (Generate); Ninstance : Block_Instance_Acc; Sub_Instance : Block_Instance_Acc; Bound, Index : Iir_Value_Literal_Acc; begin -- LRM93 12.4.2 -- For a generate statement with a for generation scheme, elaboration -- consists of the elaboration of the discrete range Ninstance := Create_Block_Instance (Instance, Bod, Bod); Elaborate_Declaration (Ninstance, Iter); Bound := Execute_Bounds (Ninstance, Get_Type (Iter)); -- Index is the iterator value. Index := Unshare (Ninstance.Objects (Get_Info (Iter).Slot), Current_Pool); -- Initialize the iterator. Store (Index, Bound.Left); if not Is_In_Range (Index, Bound) then -- Well, this instance should have never been built. -- Should be destroyed ?? raise Internal_Error; return; end if; loop Sub_Instance := Create_Block_Instance (Ninstance, Bod, Iter); -- FIXME: this is needed to copy iterator type (if any). But this -- elaborates the subtype several times (what about side effects). Elaborate_Declaration (Sub_Instance, Iter); -- Store index. Store (Sub_Instance.Objects (Get_Info (Iter).Slot), Index); Elaborate_Declarative_Part (Sub_Instance, Get_Declaration_Chain (Bod)); Elaborate_Statement_Part (Sub_Instance, Get_Concurrent_Statement_Chain (Bod)); Update_Loop_Index (Index, Bound); exit when not Is_In_Range (Index, Bound); end loop; -- FIXME: destroy index ? end Elaborate_For_Generate_Statement; procedure Elaborate_Process_Statement (Instance : Block_Instance_Acc; Stmt : Iir) is Proc_Instance : Block_Instance_Acc; begin Proc_Instance := Create_Block_Instance (Instance, Stmt, Stmt); Processes_Table.Append (Proc_Instance); -- Processes aren't elaborated here. They are elaborated -- just before simulation. end Elaborate_Process_Statement; -- LRM93 §12.4 Elaboration of a Statement Part. procedure Elaborate_Statement_Part (Instance : Block_Instance_Acc; Stmt_Chain: Iir) is Stmt : Iir; begin -- Concurrent statements appearing in the statement part of a block -- must be elaborated before execution begins. -- Elaboration of the statement part of a block consists of the -- elaboration of each concurrent statement in the order given. Stmt := Stmt_Chain; while Stmt /= Null_Iir loop case Get_Kind (Stmt) is when Iir_Kind_Block_Statement => Elaborate_Block_Statement (Instance, Stmt); when Iir_Kind_Sensitized_Process_Statement | Iir_Kind_Process_Statement => Elaborate_Process_Statement (Instance, Stmt); when Iir_Kind_Component_Instantiation_Statement => Elaborate_Component_Instantiation (Instance, Stmt); when Iir_Kind_If_Generate_Statement => Elaborate_If_Generate_Statement (Instance, Stmt); when Iir_Kind_For_Generate_Statement => Elaborate_For_Generate_Statement (Instance, Stmt); when Iir_Kind_Simple_Simultaneous_Statement => Add_Characteristic_Expression (Explicit, Build (Op_Plus, Instance, Get_Simultaneous_Right (Stmt), Build (Op_Minus, Instance, Get_Simultaneous_Left (Stmt)))); when others => Error_Kind ("elaborate_statement_part", Stmt); end case; Stmt := Get_Chain (Stmt); end loop; end Elaborate_Statement_Part; -- Compute the default value for declaration DECL, using either -- DEFAULT_VALUE if not null, or the implicit default value for DECL. -- DECL must have a type. function Elaborate_Default_Value (Instance : Block_Instance_Acc; Decl : Iir) return Iir_Value_Literal_Acc is Default_Value : constant Iir := Get_Default_Value (Decl); Val : Iir_Value_Literal_Acc; begin if Default_Value /= Null_Iir then Val := Execute_Expression_With_Type (Instance, Default_Value, Get_Type (Decl)); else Val := Create_Value_For_Type (Instance, Get_Type (Decl), True); end if; return Val; end Elaborate_Default_Value; -- LRM93 §12.3.1.1 Subprogram Declaration and Bodies procedure Elaborate_Interface_List (Instance : Block_Instance_Acc; Inter_Chain : Iir) is Inter : Iir; begin -- elaboration of the parameter interface list -- this in turn involves the elaboration of the subtype indication of -- each interface element to determine the subtype of each formal -- parameter of the subprogram. Inter := Inter_Chain; while Inter /= Null_Iir loop case Get_Kind (Inter) is when Iir_Kind_Interface_Signal_Declaration | Iir_Kind_Interface_Variable_Declaration | Iir_Kind_Interface_Constant_Declaration | Iir_Kind_Interface_File_Declaration => Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Type (Inter)); when others => Error_Kind ("elaborate_interface_list", Inter); end case; Inter := Get_Chain (Inter); end loop; end Elaborate_Interface_List; -- LRM93 §12.3.1.1 Subprogram Declaration and Bodies procedure Elaborate_Subprogram_Declaration (Instance : Block_Instance_Acc; Decl : Iir) is begin -- Elaboration of a subprogram declaration involves the elaboration -- of the parameter interface list of the subprogram declaration; [...] Elaborate_Interface_List (Instance, Get_Interface_Declaration_Chain (Decl)); -- Elaboration of a subprogram body has no effect other than to -- establish that the body can, from then on, be used for the -- execution of calls of the subprogram. -- FIXME null; end Elaborate_Subprogram_Declaration; procedure Elaborate_Component_Configuration (Stmt : Iir_Component_Instantiation_Statement; Comp_Instance : Block_Instance_Acc; Conf : Iir_Component_Configuration) is Component : constant Iir_Component_Declaration := Get_Named_Entity (Get_Instantiated_Unit (Stmt)); Entity : Iir_Entity_Declaration; Arch_Name : Name_Id; Arch_Design : Iir_Design_Unit; Arch : Iir_Architecture_Body; Arch_Frame : Block_Instance_Acc; pragma Unreferenced (Arch_Frame); Generic_Map_Aspect_Chain : Iir; Port_Map_Aspect_Chain : Iir; Binding : Iir_Binding_Indication; Aspect : Iir; Sub_Conf : Iir; begin if Trace_Elaboration then Ada.Text_IO.Put ("configure component "); Ada.Text_IO.Put (Name_Table.Image (Get_Label (Stmt))); Ada.Text_IO.Put (": "); Ada.Text_IO.Put_Line (Image_Identifier (Component)); end if; -- Elaboration of a component instantiation statement that instanciates -- a component declaration has no effect unless the component instance -- is either fully bound to a design entity defined by an entity -- declaration and architecture body or is bound to a configuration of -- such a design entity. if not Is_Fully_Bound (Conf) then Warning_Msg_Elab (Disp_Node (Stmt) & " not bound", Stmt); return; end if; if Trace_Elaboration then Ada.Text_IO.Put_Line (" using " & Disp_Node (Conf) & " from " & Disp_Location (Conf)); end if; -- If a component instance is so bound, then elaboration of the -- corresponding component instantiation statement consists of the -- elaboration of the implied block statement representing the -- component instance and [...] -- FIXME: extract frame. -- and (within that block) the implied block statement representing the -- design entity to which the component instance is so bound. Arch := Null_Iir; Arch_Name := Null_Identifier; Binding := Get_Binding_Indication (Conf); Aspect := Get_Entity_Aspect (Binding); case Get_Kind (Conf) is when Iir_Kind_Component_Configuration => Sub_Conf := Get_Block_Configuration (Conf); when Iir_Kind_Configuration_Specification => Sub_Conf := Null_Iir; when others => raise Internal_Error; end case; case Get_Kind (Aspect) is when Iir_Kind_Design_Unit => raise Internal_Error; when Iir_Kind_Entity_Aspect_Entity => Entity := Get_Entity (Aspect); if Get_Architecture (Aspect) /= Null_Iir then Arch_Name := Get_Identifier (Get_Architecture (Aspect)); end if; when Iir_Kind_Entity_Aspect_Configuration => if Sub_Conf /= Null_Iir then raise Internal_Error; end if; declare Conf : constant Iir := Get_Configuration (Aspect); begin Entity := Get_Entity (Conf); Sub_Conf := Get_Block_Configuration (Conf); Arch := Get_Named_Entity (Get_Block_Specification (Sub_Conf)); end; when others => Error_Kind ("elaborate_component_declaration0", Aspect); end case; if Arch = Null_Iir then if Arch_Name = Null_Identifier then Arch := Libraries.Get_Latest_Architecture (Entity); if Arch = Null_Iir then Error_Msg_Elab ("no architecture analysed for " & Disp_Node (Entity), Stmt); end if; Arch_Name := Get_Identifier (Arch); end if; Arch_Design := Libraries.Load_Secondary_Unit (Get_Design_Unit (Entity), Arch_Name, Stmt); if Arch_Design = Null_Iir then Error_Msg_Elab ("no architecture `" & Name_Table.Image (Arch_Name) & "' for " & Disp_Node (Entity), Stmt); end if; Arch := Get_Library_Unit (Arch_Design); end if; Generic_Map_Aspect_Chain := Get_Generic_Map_Aspect_Chain (Binding); Port_Map_Aspect_Chain := Get_Port_Map_Aspect_Chain (Binding); if Generic_Map_Aspect_Chain = Null_Iir then -- LRM93 5.2.2 -- The default binding indication includes a default generic map -- aspect if the design entity implied by the entity aspect contains -- formal generic -- GHDL: this condition is checked by create_default_association. Generic_Map_Aspect_Chain := Create_Default_Association (Get_Generic_Chain (Entity), Get_Generic_Chain (Component), Stmt); end if; if Port_Map_Aspect_Chain = Null_Iir then Port_Map_Aspect_Chain := Create_Default_Association (Get_Port_Chain (Entity), Get_Port_Chain (Component), Stmt); end if; if Sub_Conf = Null_Iir then Sub_Conf := Get_Default_Configuration_Declaration (Arch); Sub_Conf := Get_Block_Configuration (Get_Library_Unit (Sub_Conf)); end if; -- FIXME: Use Sub_Conf instead of Arch for Stmt ? (But need to add -- info for block configuration). Arch_Frame := Elaborate_Architecture (Arch, Sub_Conf, Comp_Instance, Arch, Generic_Map_Aspect_Chain, Port_Map_Aspect_Chain); end Elaborate_Component_Configuration; procedure Elaborate_Block_Configuration (Conf : Iir_Block_Configuration; Instance : Block_Instance_Acc); procedure Apply_Block_Configuration_To_Iterative_Generate (Stmt : Iir; Conf_Chain : Iir; Instance : Block_Instance_Acc) is Scheme : constant Iir := Get_Parameter_Specification (Stmt); Bounds : constant Iir_Value_Literal_Acc := Execute_Bounds (Instance, Get_Type (Scheme)); Sub_Instances : Block_Instance_Acc_Array (0 .. Instance_Slot_Type (Bounds.Length - 1)); type Sub_Conf_Type is array (0 .. Instance_Slot_Type (Bounds.Length - 1)) of Boolean; Sub_Conf : Sub_Conf_Type := (others => False); Child : Block_Instance_Acc; Item : Iir; Prev_Item : Iir; Default_Item : Iir := Null_Iir; Spec : Iir; Expr : Iir_Value_Literal_Acc; Ind : Instance_Slot_Type; begin -- Gather children (were prepended, so in reverse order). Child := Instance.Children; for I in reverse Sub_Instances'Range loop Sub_Instances (I) := Child; Child := Child.Brother; end loop; -- All children must have been handled. pragma Assert (Child = null); -- Apply configuration items Item := Conf_Chain; while Item /= Null_Iir loop Spec := Strip_Denoting_Name (Get_Block_Specification (Item)); Prev_Item := Get_Prev_Block_Configuration (Item); case Get_Kind (Spec) is when Iir_Kind_Slice_Name => Expr := Execute_Bounds (Instance, Get_Suffix (Spec)); Ind := Instance_Slot_Type (Get_Index_Offset (Execute_Low_Limit (Expr), Bounds, Spec)); for I in 1 .. Instance_Slot_Type (Expr.Length) loop Sub_Conf (Ind + I - 1) := True; Elaborate_Block_Configuration (Item, Sub_Instances (Ind + I - 1)); end loop; when Iir_Kind_Indexed_Name => if Get_Index_List (Spec) = Iir_List_Others then -- Must be the only default block configuration pragma Assert (Default_Item = Null_Iir); Default_Item := Item; else Expr := Execute_Expression (Instance, Get_First_Element (Get_Index_List (Spec))); Ind := Instance_Slot_Type (Get_Index_Offset (Expr, Bounds, Spec)); Sub_Conf (Ind) := True; Elaborate_Block_Configuration (Item, Sub_Instances (Ind)); end if; when Iir_Kind_Generate_Statement_Body => -- Must be the only block configuration pragma Assert (Item = Conf_Chain); pragma Assert (Prev_Item = Null_Iir); for I in Sub_Instances'Range loop Sub_Conf (I) := True; Elaborate_Block_Configuration (Item, Sub_Instances (I)); end loop; when others => raise Internal_Error; end case; Item := Prev_Item; end loop; -- Default configuration. if Default_Item /= Null_Iir then for I in Sub_Instances'Range loop if not Sub_Conf (I) then Elaborate_Block_Configuration (Default_Item, Sub_Instances (I)); end if; end loop; end if; end Apply_Block_Configuration_To_Iterative_Generate; procedure Elaborate_Block_Configuration (Conf : Iir_Block_Configuration; Instance : Block_Instance_Acc) is Blk_Info : constant Sim_Info_Acc := Get_Info (Instance.Stmt); Sub_Instances : Block_Instance_Acc_Array (0 .. Blk_Info.Nbr_Instances - 1); type Iir_Array is array (Instance_Slot_Type range <>) of Iir; Sub_Conf : Iir_Array (0 .. Blk_Info.Nbr_Instances - 1) := (others => Null_Iir); Item : Iir; begin -- Gather children. declare Child : Block_Instance_Acc; begin Child := Instance.Children; while Child /= null loop declare Slot : constant Instance_Slot_Type := Get_Info (Child.Label).Inst_Slot; begin -- Skip processes (they have no slot). if Slot /= Invalid_Instance_Slot then pragma Assert (Sub_Instances (Slot) = null); Sub_Instances (Slot) := Child; end if; end; Child := Child.Brother; end loop; end; -- Associate configuration items with subinstance. Gather items for -- for-generate statements. Item := Get_Configuration_Item_Chain (Conf); while Item /= Null_Iir loop case Get_Kind (Item) is when Iir_Kind_Block_Configuration => declare Spec : Iir; Gen : Iir_Generate_Statement; Info : Sim_Info_Acc; begin Spec := Strip_Denoting_Name (Get_Block_Specification (Item)); case Get_Kind (Spec) is when Iir_Kind_Slice_Name | Iir_Kind_Indexed_Name | Iir_Kind_Selected_Name => -- Block configuration for a generate statement. Gen := Get_Named_Entity (Get_Prefix (Spec)); Info := Get_Info (Gen); Set_Prev_Block_Configuration (Item, Sub_Conf (Info.Inst_Slot)); Sub_Conf (Info.Inst_Slot) := Item; when Iir_Kind_Parenthesis_Name => Gen := Get_Named_Entity (Spec); Info := Get_Info (Gen); if Sub_Instances (Info.Inst_Slot) /= null and then Sub_Instances (Info.Inst_Slot).Label = Gen then pragma Assert (Sub_Conf (Info.Inst_Slot) = Null_Iir); Sub_Conf (Info.Inst_Slot) := Item; end if; when Iir_Kind_Generate_Statement_Body => Info := Get_Info (Spec); pragma Assert (Sub_Conf (Info.Inst_Slot) = Null_Iir); Sub_Conf (Info.Inst_Slot) := Item; when Iir_Kind_Block_Statement => -- Block configuration for a block statement. Info := Get_Info (Spec); pragma Assert (Sub_Conf (Info.Inst_Slot) = Null_Iir); Sub_Conf (Info.Inst_Slot) := Item; when others => Error_Kind ("elaborate_block_configuration1", Spec); end case; end; when Iir_Kind_Component_Configuration => declare List : constant Iir_List := Get_Instantiation_List (Item); El : Iir; Info : Sim_Info_Acc; begin if List = Iir_List_All or else List = Iir_List_Others then raise Internal_Error; end if; for I in Natural loop El := Get_Nth_Element (List, I); exit when El = Null_Iir; Info := Get_Info (Get_Named_Entity (El)); pragma Assert (Sub_Conf (Info.Inst_Slot) = Null_Iir); Sub_Conf (Info.Inst_Slot) := Item; end loop; end; when others => Error_Kind ("elaborate_block_configuration", Item); end case; Item := Get_Chain (Item); end loop; -- Configure sub instances. for I in Sub_Instances'Range loop declare Sub_Inst : constant Block_Instance_Acc := Sub_Instances (I); Stmt : Iir; begin if Sub_Inst /= null then Stmt := Sub_Inst.Label; case Get_Kind (Stmt) is when Iir_Kind_Generate_Statement_Body => Stmt := Get_Parent (Stmt); case Get_Kind (Stmt) is when Iir_Kind_For_Generate_Statement => Apply_Block_Configuration_To_Iterative_Generate (Stmt, Sub_Conf (I), Sub_Inst); when Iir_Kind_If_Generate_Statement | Iir_Kind_If_Generate_Else_Clause => Elaborate_Block_Configuration (Sub_Conf (I), Sub_Inst); when others => raise Internal_Error; end case; when Iir_Kind_Block_Statement => Elaborate_Block_Configuration (Sub_Conf (I), Sub_Inst); when Iir_Kind_Component_Instantiation_Statement => if Is_Component_Instantiation (Stmt) then Elaborate_Component_Configuration (Stmt, Sub_Inst, Sub_Conf (I)); else -- Nothing to do for entity instantiation, will be -- done during elaboration of statements. null; end if; when others => Error_Kind ("elaborate_block_configuration", Stmt); end case; end if; end; end loop; end Elaborate_Block_Configuration; procedure Elaborate_Alias_Declaration (Instance : Block_Instance_Acc; Decl : Iir_Object_Alias_Declaration) is Alias_Type : Iir; Res : Iir_Value_Literal_Acc; begin -- LRM93 12.3.1.5 -- Elaboration of an alias declaration consists of the elaboration -- of the subtype indication to establish the subtype associated -- with the alias, folloed by the creation of the alias as an -- alternative name for the named entity. -- The creation of an alias for an array object involves a check -- that the subtype associated with the alias includes a matching -- element for each element of the named object. -- It is an error if this check fails. Alias_Type := Get_Type (Decl); Elaborate_Subtype_Indication_If_Anonymous (Instance, Alias_Type); Create_Object (Instance, Decl); Res := Execute_Name (Instance, Get_Name (Decl), True); Implicit_Array_Conversion (Instance, Res, Alias_Type, Get_Name (Decl)); Instance.Objects (Get_Info (Decl).Slot) := Unshare_Bounds (Res, Instance_Pool); end Elaborate_Alias_Declaration; -- LRM93 §12.3.2.3 Disconnection Specifications procedure Elaborate_Disconnection_Specification (Instance : Block_Instance_Acc; Decl : Iir_Disconnection_Specification) is Time_Val : Iir_Value_Literal_Acc; Time : Iir_Value_Time; List : Iir_List; Sig : Iir; Val : Iir_Value_Literal_Acc; begin -- LRM93 §12.3.2.3 -- Elaboration of a disconnection specification proceeds as follows: -- 2. The time expression is evaluated to determine the disconnection -- time for drivers of the affected signals. Time_Val := Execute_Expression (Instance, Get_Expression (Decl)); Time := Time_Val.I64; -- LRM93 5.3 -- The time expression in a disconnection specification must be static -- and must evaluate to a non-negative value. if Time < 0 then Error_Msg_Sem ("time must be non-negative", Decl); end if; -- LRM93 §12.3.2.3 -- 1. The guarded signal specification is elaborated in order to -- identify the signals affected by the disconnection specification. -- -- 3. The diconnection time is associated with each affected signal for -- later use in constructing disconnection statements in the -- equivalent processes for guarded assignments to the affected -- signals. List := Get_Signal_List (Decl); case List is when Iir_List_All | Iir_List_Others => Error_Kind ("elaborate_disconnection_specification", Decl); when others => for I in Natural loop Sig := Get_Nth_Element (List, I); exit when Sig = Null_Iir; Val := Execute_Name (Instance, Sig, True); Disconnection_Table.Append ((Sig => Val, Time => Time)); end loop; end case; end Elaborate_Disconnection_Specification; procedure Elaborate_Branch_Quantity_Declaration (Instance : Block_Instance_Acc; Decl : Iir) is Terminal_Plus, Terminal_Minus : Iir; Plus, Minus : Iir_Value_Literal_Acc; Res : Iir_Value_Literal_Acc; begin Res := Create_Quantity (Instance, Decl); Terminal_Plus := Get_Plus_Terminal (Decl); Plus := Execute_Name (Instance, Terminal_Plus, True); Terminal_Minus := Get_Minus_Terminal (Decl); if Terminal_Minus = Null_Iir then -- Get the reference of the nature -- FIXME: select/index Terminal_Minus := Get_Reference (Get_Nature (Terminal_Plus)); end if; Minus := Execute_Name (Instance, Terminal_Minus, True); case Iir_Kinds_Branch_Quantity_Declaration (Get_Kind (Decl)) is when Iir_Kind_Across_Quantity_Declaration => -- Expr: q - P'ref + M'ref Add_Characteristic_Expression (Structural, Build (Op_Plus, Res.Quantity, Build (Op_Minus, Get_Terminal_Reference (Plus.Terminal), Build (Op_Plus, Get_Terminal_Reference (Minus.Terminal))))); when Iir_Kind_Through_Quantity_Declaration => -- P'Contrib <- P'Contrib + q -- M'Contrib <- M'Contrib - q Append_Characteristic_Expression (Plus.Terminal, Build (Op_Plus, Res.Quantity)); Append_Characteristic_Expression (Minus.Terminal, Build (Op_Minus, Res.Quantity)); end case; end Elaborate_Branch_Quantity_Declaration; -- LRM93 §12.3.1 Elaboration of a declaration procedure Elaborate_Declaration (Instance : Block_Instance_Acc; Decl : Iir) is Expr_Mark : Mark_Type; Val : Iir_Value_Literal_Acc; begin Mark (Expr_Mark, Expr_Pool); -- Elaboration of a declaration has the effect of creating the declared -- item. For each declaration, the language rules (in particular scope -- and visibility rules) are such that it is either impossible or -- illegal to use a given item before the elaboration of its -- corresponding declaration. -- Similarly, it is illegal to call a subprogram before its -- corresponding body is elaborated. case Get_Kind (Decl) is when Iir_Kind_Function_Declaration | Iir_Kind_Procedure_Declaration => if Get_Implicit_Definition (Decl) in Iir_Predefined_Explicit and then not Is_Second_Subprogram_Specification (Decl) then Elaborate_Subprogram_Declaration (Instance, Decl); end if; when Iir_Kind_Anonymous_Type_Declaration => Elaborate_Type_Definition (Instance, Get_Type_Definition (Decl)); when Iir_Kind_Type_Declaration => Elaborate_Type_Declaration (Instance, Decl); when Iir_Kind_Subtype_Declaration => Elaborate_Subtype_Indication (Instance, Get_Type (Decl)); when Iir_Kind_Iterator_Declaration => Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Type (Decl)); Val := Create_Value_For_Type (Instance, Get_Type (Decl), True); Create_Object (Instance, Decl); Instance.Objects (Get_Info (Decl).Slot) := Unshare (Val, Instance_Pool); when Iir_Kind_Signal_Declaration => Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Type (Decl)); Val := Elaborate_Default_Value (Instance, Decl); Create_Signal (Instance, Decl); Elaborate_Signal (Instance, Decl, Val); when Iir_Kind_Variable_Declaration => Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Type (Decl)); Val := Elaborate_Default_Value (Instance, Decl); Create_Object (Instance, Decl); Instance.Objects (Get_Info (Decl).Slot) := Unshare (Val, Instance_Pool); when Iir_Kind_Constant_Declaration => declare Deferred_Decl : constant Iir := Get_Deferred_Declaration (Decl); First_Decl : Iir; begin if Deferred_Decl = Null_Iir or else Get_Deferred_Declaration_Flag (Decl) then -- Create the object (except for full declaration of a -- deferred constant). Elaborate_Subtype_Indication_If_Anonymous (Instance, Get_Type (Decl)); Create_Object (Instance, Decl); end if; -- Initialize the value (except for a deferred declaration). if Deferred_Decl = Null_Iir then First_Decl := Decl; elsif not Get_Deferred_Declaration_Flag (Decl) then First_Decl := Deferred_Decl; else First_Decl := Null_Iir; end if; if First_Decl /= Null_Iir then Val := Execute_Expression_With_Type (Instance, Get_Default_Value (Decl), Get_Type (First_Decl)); Instance.Objects (Get_Info (First_Decl).Slot) := Unshare (Val, Instance_Pool); end if; end; when Iir_Kind_File_Declaration => -- LRM93 12.3.1.4 -- Elaboration of a file object declaration consists of the -- elaboration of the subtype indication... null; -- FIXME ?? -- ...followed by the creation of object. Create_Object (Instance, Decl); -- If the file object declaration contains file_open_information, -- then the implicit call to FILE_OPEN is then executed. Instance.Objects (Get_Info (Decl).Slot) := Unshare (File_Operation.Elaborate_File_Declaration (Instance, Decl), Instance_Pool); when Iir_Kind_Object_Alias_Declaration => Elaborate_Alias_Declaration (Instance, Decl); when Iir_Kind_Component_Declaration => -- LRM93 12.3.1.7 -- Elaboration of a component declaration has no effect other -- than to create a template for instantiating component -- instances. null; when Iir_Kind_Function_Body | Iir_Kind_Procedure_Body => null; when Iir_Kind_Configuration_Specification => -- Elaboration of a configuration specification proceeds as -- follows: -- 1. The component specification is elaborated in order to -- determine which component instances are affected by the -- configuration specification. -- GHDL: this is done during sem. -- 2. The binding indication is elaborated to identify the design -- entity to which the affected component instances will be -- bound. -- GHDL: this is already done during sem, according to rules -- defined by section 5.3.1.1 -- 3. The binding information is associated with each affected -- component instance label for later use in instantiating -- those component instances. -- GHDL: this is done during step 1. -- As part of this elaboration process, a check is made that both -- the entity declaration and the corresponding architecture body -- implied by the binding indication exist whithin the specified -- library. -- It is an error if this check fails. -- GHDL: this is already done during sem, according to rules -- defined by section 5.3.1.1 null; when Iir_Kind_Attribute_Declaration => -- LRM93 12.3.1.6 -- Elaboration of an attribute declaration has no effect other -- than to create a template for defining attributes of items. null; when Iir_Kind_Attribute_Specification => -- LRM93 12.3.2.1 -- Elaboration of an attribute specification proceeds as follows: -- 1. The entity specification is elaborated in order to -- determine which items are affected by the attribute -- specification. -- GHDL: done by sem. declare Attr_Decl : constant Iir := Get_Named_Entity (Get_Attribute_Designator (Decl)); Attr_Type : constant Iir := Get_Type (Attr_Decl); Value : Iir_Attribute_Value; Val : Iir_Value_Literal_Acc; begin Value := Get_Attribute_Value_Spec_Chain (Decl); while Value /= Null_Iir loop -- 2. The expression is evaluated to determine the value -- of the attribute. -- It is an error if the value of the expression does not -- belong to the subtype of the attribute; if the -- attribute is of an array type, then an implicit -- subtype conversion is first performed on the value, -- unless the attribute's subtype indication denotes an -- unconstrained array type. Val := Execute_Expression (Instance, Get_Expression (Decl)); Check_Constraints (Instance, Val, Attr_Type, Decl); -- 3. A new instance of the designated attribute is created -- and associated with each of the affected items. -- -- 4. Each new attribute instance is assigned the value of -- the expression. Create_Object (Instance, Value); Instance.Objects (Get_Info (Value).Slot) := Unshare (Val, Instance_Pool); Value := Get_Spec_Chain (Value); end loop; end; when Iir_Kind_Disconnection_Specification => Elaborate_Disconnection_Specification (Instance, Decl); when Iir_Kind_Use_Clause => null; when Iir_Kind_Delayed_Attribute => Elaborate_Delayed_Signal (Instance, Decl); when Iir_Kind_Stable_Attribute => Elaborate_Implicit_Signal (Instance, Decl, Implicit_Stable); when Iir_Kind_Quiet_Attribute => Elaborate_Implicit_Signal (Instance, Decl, Implicit_Quiet); when Iir_Kind_Transaction_Attribute => Elaborate_Implicit_Signal (Instance, Decl, Implicit_Transaction); when Iir_Kind_Non_Object_Alias_Declaration => null; when Iir_Kind_Group_Template_Declaration | Iir_Kind_Group_Declaration => null; when Iir_Kind_Protected_Type_Body => null; when Iir_Kind_Nature_Declaration => Elaborate_Nature_Definition (Instance, Get_Nature (Decl)); Create_Terminal (Instance, Get_Chain (Decl)); when Iir_Kind_Terminal_Declaration => Create_Terminal (Instance, Decl); when Iir_Kinds_Branch_Quantity_Declaration => Elaborate_Branch_Quantity_Declaration (Instance, Decl); when others => Error_Kind ("elaborate_declaration", Decl); end case; Release (Expr_Mark, Expr_Pool); end Elaborate_Declaration; procedure Destroy_Iterator_Declaration (Instance : Block_Instance_Acc; Decl : Iir) is Obj_Type : constant Iir := Get_Type (Decl); Constraint : Iir; Cons_Info : Sim_Info_Acc; begin if Get_Kind (Decl) /= Iir_Kind_Iterator_Declaration then raise Internal_Error; end if; Destroy_Object (Instance, Decl); if Get_Kind (Obj_Type) = Iir_Kind_Range_Array_Attribute or else not Is_Anonymous_Type_Definition (Obj_Type) then return; end if; Constraint := Get_Range_Constraint (Obj_Type); if Get_Kind (Constraint) /= Iir_Kind_Range_Expression then return; end if; Cons_Info := Get_Info (Constraint); if Cons_Info.Obj_Scope = Instance.Block_Scope and then Cons_Info.Slot = Instance.Elab_Objects then Destroy_Object (Instance, Constraint); end if; end Destroy_Iterator_Declaration; procedure Finalize_Declarative_Part (Instance : Block_Instance_Acc; Decl_Chain : Iir) is Decl : Iir; Val : Iir_Value_Literal_Acc; begin Decl := Decl_Chain; while Decl /= Null_Iir loop case Get_Kind (Decl) is when Iir_Kind_File_Declaration => -- LRM93 3.4.1 -- An implicit call to FILE_CLOSE exists in a subprogram body -- for every file object declared in the corresponding -- subprogram declarative part. -- Each such call associates a unique file object with the -- formal parameter F and is called whenever the corresponding -- subprogram completes its execution. Val := Instance.Objects (Get_Info (Decl).Slot); if Get_Text_File_Flag (Get_Type (Decl)) then File_Operation.File_Close_Text (Val, Null_Iir); File_Operation.File_Destroy_Text (Val); else File_Operation.File_Close_Binary (Val, Null_Iir); File_Operation.File_Destroy_Binary (Val); end if; when others => null; end case; Decl := Get_Chain (Decl); end loop; end Finalize_Declarative_Part; -- LRM93 §12.3 Elaboration of a Declarative Part procedure Elaborate_Declarative_Part (Instance : Block_Instance_Acc; Decl_Chain : Iir) is Decl : Iir; begin -- The elaboration of a declarative part consists of the elaboration -- of the declarative items, if any, in the order in which they are -- given in the declarative part. -- [Exception for 'foreign ] Decl := Decl_Chain; while Decl /= Null_Iir loop -- In certain cases, the elaboration of a declarative item involves -- the evaluation of expressions that appear within the declarative -- item. -- The value of any object denoted by a primary in such an expression -- must be defined at the time the primary is read. -- In addition, if a primary in such an expression is a function call -- then the value of any object denoted or appearing as part of an -- actual designator in the function call must be defined at the -- time the expression is evaluated. -- FIXME: check this. Elaborate_Declaration (Instance, Decl); Decl := Get_Chain (Decl); end loop; end Elaborate_Declarative_Part; function Elaborate_Architecture (Arch : Iir_Architecture_Body; Conf : Iir_Block_Configuration; Parent_Instance : Block_Instance_Acc; Stmt : Iir; Generic_Map : Iir; Port_Map : Iir) return Block_Instance_Acc is Entity : constant Iir_Entity_Declaration := Get_Entity (Arch); Instance : Block_Instance_Acc; Expr_Mark : Mark_Type; begin Mark (Expr_Mark, Expr_Pool); if Trace_Elaboration then Ada.Text_IO.Put ("elaborating "); Ada.Text_IO.Put (Image_Identifier (Arch)); Ada.Text_IO.Put (" of "); Ada.Text_IO.Put_Line (Image_Identifier (Entity)); end if; Instance := Create_Block_Instance (Parent_Instance, Arch, Stmt); Instance.Up_Block := null; -- Packages_Instance; -- LRM93 §12.1 -- Elaboration of a block statement involves first elaborating each not -- yet elaborated package containing declarations referenced by the -- block. Elaborate_Dependence (Get_Design_Unit (Arch)); Current_Component := Parent_Instance; Elaborate_Generic_Clause (Instance, Get_Generic_Chain (Entity)); Elaborate_Generic_Map_Aspect (Instance, Parent_Instance, Generic_Map); Elaborate_Port_Clause (Instance, Get_Port_Chain (Entity)); Elaborate_Port_Map_Aspect (Instance, Parent_Instance, Get_Port_Chain (Entity), Port_Map); Current_Component := null; Elaborate_Declarative_Part (Instance, Get_Declaration_Chain (Entity)); Elaborate_Declarative_Part (Instance, Get_Declaration_Chain (Arch)); Elaborate_Statement_Part (Instance, Get_Concurrent_Statement_Chain (Entity)); Elaborate_Statement_Part (Instance, Get_Concurrent_Statement_Chain (Arch)); -- Configure the unit. This will create sub units. Elaborate_Block_Configuration (Conf, Instance); Release (Expr_Mark, Expr_Pool); return Instance; end Elaborate_Architecture; -- Elaborate a design. procedure Elaborate_Design (Design: Iir_Design_Unit) is Unit : constant Iir := Get_Library_Unit (Design); Conf_Unit : Iir_Design_Unit; Conf : Iir_Block_Configuration; Arch_Unit : Iir_Design_Unit; Arch : Iir_Architecture_Body; Entity : Iir_Entity_Declaration; Generic_Map : Iir; Port_Map : Iir; begin Package_Instances := new Package_Instances_Array (1 .. Nbr_Packages); -- Use a 'fake' process to execute code during elaboration. Current_Process := No_Process; -- Find architecture and configuration for the top unit case Get_Kind (Unit) is when Iir_Kind_Architecture_Body => Arch := Unit; Conf_Unit := Get_Default_Configuration_Declaration (Unit); when Iir_Kind_Configuration_Declaration => Conf_Unit := Design; Arch := Get_Named_Entity (Get_Block_Specification (Get_Block_Configuration (Unit))); Elaborate_Dependence (Design); when others => Error_Kind ("elaborate_design", Unit); end case; Arch_Unit := Get_Design_Unit (Arch); Entity := Get_Entity (Arch); Elaborate_Dependence (Arch_Unit); -- Sanity check: memory area for expressions must be empty. if not Is_Empty (Expr_Pool) then raise Internal_Error; end if; -- Use default values for top entity generics and ports. Generic_Map := Create_Default_Association (Get_Generic_Chain (Entity), Null_Iir, Entity); Port_Map := Create_Default_Association (Get_Port_Chain (Entity), Null_Iir, Entity); -- Elaborate from the top configuration. Conf := Get_Block_Configuration (Get_Library_Unit (Conf_Unit)); Top_Instance := Elaborate_Architecture (Arch, Conf, null, Arch, Generic_Map, Port_Map); Current_Process := null; -- Stop now in case of errors. if Nbr_Errors /= 0 then Grt.Errors.Fatal_Error; end if; -- Sanity check: memory area for expressions must be empty. if not Is_Empty (Expr_Pool) then raise Internal_Error; end if; end Elaborate_Design; end Elaboration;