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-- GHDL Run Time (GRT) - RTI address handling.
-- Copyright (C) 2002 - 2014 Tristan Gingold
--
-- 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, see <gnu.org/licenses>.
--
-- As a special exception, if other files instantiate generics from this
-- unit, or you link this unit with other files to produce an executable,
-- this unit does not by itself cause the resulting executable to be
-- covered by the GNU General Public License. This exception does not
-- however invalidate any other reasons why the executable file might be
-- covered by the GNU Public License.
with System; use System;
with Ada.Unchecked_Conversion;
with Grt.Types; use Grt.Types;
with Grt.Vhdl_Types; use Grt.Vhdl_Types;
with Grt.Rtis; use Grt.Rtis;
-- Addresses handling.
package Grt.Rtis_Addr is
function "+" (L : Address; R : Ghdl_Rti_Loc) return Address;
function "+" (L : Address; R : Ghdl_Index_Type) return Address;
function "-" (L : Address; R : Ghdl_Rti_Loc) return Address;
function Align (L : Address; R : Ghdl_Rti_Loc) return Address;
-- An RTI context contains a pointer (BASE) to or into an instance.
-- BLOCK describes data being pointed. If a reference is made to a field
-- described by a parent of BLOCK, BASE must be modified.
type Rti_Context is record
Base : Address;
Block : Ghdl_Rti_Access;
end record;
Null_Context : constant Rti_Context;
-- Access to an address.
type Addr_Acc is access Address;
function To_Addr_Acc is new Ada.Unchecked_Conversion
(Source => Address, Target => Addr_Acc);
-- Get the parent context of CTXT.
-- The parent of an architecture is its entity.
function Get_Parent_Context (Ctxt : Rti_Context) return Rti_Context;
-- From an entity link, extract context and instantiation statement.
procedure Get_Instance_Link (Link : Ghdl_Entity_Link_Acc;
Ctxt : out Rti_Context;
Stmt : out Ghdl_Rti_Access);
-- Get the child context of if-generate statement GEN. Return Null_Context
-- if there is no child.
function Get_If_Case_Generate_Child
(Ctxt : Rti_Context; Gen : Ghdl_Rti_Access) return Rti_Context;
-- Convert a location to an address.
-- `Depth` is the position in the design hierarchy of the object
-- we are finding the address of.
-- `Loc` is the location of that object, relative to the address
-- of it's parent.
-- `Context` is the RTI node and address of an object deeper in
-- the hierarchy that is referencing this object.
function Loc_To_Addr (Depth : Ghdl_Rti_Depth;
Loc : Ghdl_Rti_Loc;
Ctxt : Rti_Context)
return Address;
-- Get the length of for_generate GEN.
function Get_For_Generate_Length (Gen : Ghdl_Rtin_Generate_Acc;
Ctxt : Rti_Context)
return Ghdl_Index_Type;
-- Get the context of instance INST.
procedure Get_Instance_Context (Inst : Ghdl_Rtin_Instance_Acc;
Ctxt : Rti_Context;
Sub_Ctxt : out Rti_Context);
-- Extract range RNG of type DEF from BOUNDS. BOUNDS is updated to the
-- next range. DEF must be a base type.
procedure Extract_Range (Bounds : in out Address;
Def : Ghdl_Rti_Access;
Rng : out Ghdl_Range_Ptr);
function Array_Layout_To_Bounds (Layout : Address) return Address;
-- Return bounds (for arrays) or layout (for records) of array
-- layout LAYOUT according to element type EL_RTI.
function Array_Layout_To_Element
(Layout : Address; El_Rti : Ghdl_Rti_Access) return Address;
-- Extract range of every dimension from bounds.
procedure Bound_To_Range (Bounds_Addr : Address;
Def : Ghdl_Rtin_Type_Array_Acc;
Res : out Ghdl_Range_Array);
function Range_To_Length (Rng : Ghdl_Range_Ptr; Base_Type : Ghdl_Rti_Access)
return Ghdl_Index_Type;
-- Get the base type of ATYPE.
function Get_Base_Type (Atype : Ghdl_Rti_Access) return Ghdl_Rti_Access;
-- Likewise, but for an array type.
function Get_Base_Array_Type (Atype : Ghdl_Rti_Access)
return Ghdl_Rtin_Type_Array_Acc;
-- Return true iff ATYPE is anonymous.
-- Valid only on type and subtype definitions.
function Rti_Anonymous_Type (Atype : Ghdl_Rti_Access) return Boolean;
pragma Inline (Rti_Anonymous_Type);
-- Return true iff ATYPE is complex.
-- Valid only on type and subtype definitions.
function Rti_Complex_Type (Atype : Ghdl_Rti_Access) return Boolean;
pragma Inline (Rti_Complex_Type);
-- Get the top context.
function Get_Top_Context return Rti_Context;
private
Null_Context : constant Rti_Context := (Base => Null_Address,
Block => null);
end Grt.Rtis_Addr;
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