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|
-- GHDL Run Time (GRT) - RTI address handling.
-- Copyright (C) 2002, 2003, 2004, 2005 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 GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Ada.Unchecked_Conversion;
with Grt.Errors; use Grt.Errors;
package body Grt.Rtis_Addr is
function "+" (L : Address; R : Ghdl_Index_Type) return Address
is
begin
return To_Address (To_Integer (L) + Integer_Address (R));
end "+";
function "-" (L : Address; R : Ghdl_Index_Type) return Address
is
begin
return To_Address (To_Integer (L) - Integer_Address (R));
end "-";
function Align (L : Address; R : Ghdl_Index_Type) return Address
is
Nad : Integer_Address;
begin
Nad := To_Integer (L + (R - 1));
return To_Address (Nad - (Nad mod Integer_Address (R)));
end Align;
function Get_Parent_Context (Ctxt : Rti_Context) return Rti_Context
is
Blk : Ghdl_Rtin_Block_Acc;
begin
Blk := To_Ghdl_Rtin_Block_Acc (Ctxt.Block);
case Ctxt.Block.Kind is
when Ghdl_Rtik_Process
| Ghdl_Rtik_Block =>
return (Base => Ctxt.Base - Blk.Loc.Off,
Block => Blk.Parent);
when Ghdl_Rtik_Architecture =>
if Blk.Loc.Off /= 0 then
Internal_Error ("get_parent_context(3)");
end if;
return (Base => Ctxt.Base + Blk.Loc.Off,
Block => Blk.Parent);
when Ghdl_Rtik_For_Generate
| Ghdl_Rtik_If_Generate =>
declare
Nbase : Address;
Parent : Ghdl_Rti_Access;
Blk1 : Ghdl_Rtin_Block_Acc;
begin
-- Read the pointer to the parent.
-- This is the first field.
Nbase := To_Addr_Acc (Ctxt.Base).all;
-- Since the parent may be a grant-parent, adjust
-- the base.
Parent := Blk.Parent;
loop
case Parent.Kind is
when Ghdl_Rtik_Architecture
| Ghdl_Rtik_For_Generate
| Ghdl_Rtik_If_Generate =>
exit;
when Ghdl_Rtik_Block =>
Blk1 := To_Ghdl_Rtin_Block_Acc (Parent);
Nbase := Nbase + Blk1.Loc.Off;
Parent := Blk1.Parent;
when others =>
Internal_Error ("get_parent_context(2)");
end case;
end loop;
return (Base => Nbase,
Block => Blk.Parent);
end;
when others =>
Internal_Error ("get_parent_context(1)");
end case;
end Get_Parent_Context;
procedure Get_Instance_Link (Link : Ghdl_Entity_Link_Acc;
Ctxt : out Rti_Context;
Stmt : out Ghdl_Rti_Access)
is
Obj : Ghdl_Rtin_Instance_Acc;
begin
if Link.Parent = null then
-- Top entity.
Stmt := null;
Ctxt := (Base => Null_Address, Block => null);
else
Stmt := Link.Parent.Stmt;
Obj := To_Ghdl_Rtin_Instance_Acc (Stmt);
Ctxt := (Base => Link.Parent.all'Address - Obj.Loc.Off,
Block => Obj.Parent);
end if;
end Get_Instance_Link;
function Loc_To_Addr (Depth : Ghdl_Rti_Depth;
Loc : Ghdl_Rti_Loc;
Ctxt : Rti_Context)
return Address
is
Cur_Ctxt : Rti_Context;
Nctxt : Rti_Context;
begin
if Depth = 0 then
return Loc.Addr;
elsif Ctxt.Block.Depth = Depth then
--Addr := Base + Storage_Offset (Obj.Loc.Off);
return Ctxt.Base + Loc.Off;
else
if Ctxt.Block.Depth < Depth then
Internal_Error ("loc_to_addr");
end if;
Cur_Ctxt := Ctxt;
loop
Nctxt := Get_Parent_Context (Cur_Ctxt);
if Nctxt.Block.Depth = Depth then
return Nctxt.Base + Loc.Off;
end if;
Cur_Ctxt := Nctxt;
end loop;
end if;
end Loc_To_Addr;
function Range_To_Length (Rng : Ghdl_Range_Ptr; Base_Type : Ghdl_Rti_Access)
return Ghdl_Index_Type
is
begin
case Base_Type.Kind is
when Ghdl_Rtik_Type_B2 =>
return Rng.B2.Len;
when Ghdl_Rtik_Type_E8 =>
return Rng.E8.Len;
when Ghdl_Rtik_Type_E32 =>
return Rng.E32.Len;
when Ghdl_Rtik_Type_I32 =>
return Rng.I32.Len;
when others =>
Internal_Error ("range_to_length");
end case;
end Range_To_Length;
function Get_For_Generate_Length (Blk : Ghdl_Rtin_Block_Acc;
Ctxt : Rti_Context)
return Ghdl_Index_Type
is
Iter_Type : Ghdl_Rtin_Subtype_Scalar_Acc;
Rng : Ghdl_Range_Ptr;
begin
Iter_Type := To_Ghdl_Rtin_Subtype_Scalar_Acc
(To_Ghdl_Rtin_Object_Acc (Blk.Children (0)).Obj_Type);
if Iter_Type.Common.Kind /= Ghdl_Rtik_Subtype_Scalar then
Internal_Error ("get_for_generate_length(1)");
end if;
Rng := To_Ghdl_Range_Ptr
(Loc_To_Addr (Iter_Type.Common.Depth, Iter_Type.Range_Loc, Ctxt));
return Range_To_Length (Rng, Iter_Type.Basetype);
end Get_For_Generate_Length;
procedure Get_Instance_Context (Inst : Ghdl_Rtin_Instance_Acc;
Ctxt : Rti_Context;
Sub_Ctxt : out Rti_Context)
is
Inst_Addr : Address;
Inst_Base : Address;
begin
-- Address of the field containing the address of the instance.
Inst_Addr := Ctxt.Base + Inst.Loc.Off;
-- Read sub instance address.
Inst_Base := To_Addr_Acc (Inst_Addr).all;
-- Read instance RTI.
if Inst_Base = Null_Address then
Sub_Ctxt := (Base => Null_Address, Block => null);
else
Sub_Ctxt := (Base => Inst_Base,
Block => To_Ghdl_Rti_Acc_Acc (Inst_Base).all);
end if;
end Get_Instance_Context;
procedure Bound_To_Range (Bounds_Addr : Address;
Def : Ghdl_Rtin_Type_Array_Acc;
Res : out Ghdl_Range_Array)
is
Bounds : Address;
procedure Align (A : Ghdl_Index_Type) is
begin
Bounds := Align (Bounds, A);
end Align;
procedure Update (S : Ghdl_Index_Type) is
begin
Bounds := Bounds + (S / Storage_Unit);
end Update;
Idx_Def : Ghdl_Rti_Access;
begin
if Res'Length /= Def.Nbr_Dim or else Res'First /= 0 then
Internal_Error ("disp_rti.bound_to_range");
end if;
Bounds := Bounds_Addr;
for I in 0 .. Def.Nbr_Dim - 1 loop
Idx_Def := Def.Indexes (I);
if Bounds = Null_Address then
Res (I) := null;
else
Idx_Def := Get_Base_Type (Idx_Def);
case Idx_Def.Kind is
when Ghdl_Rtik_Type_I32 =>
Align (Ghdl_Range_I32'Alignment);
Res (I) := To_Ghdl_Range_Ptr (Bounds);
Update (Ghdl_Range_I32'Size);
when Ghdl_Rtik_Type_E8 =>
Align (Ghdl_Range_E8'Alignment);
Res (I) := To_Ghdl_Range_Ptr (Bounds);
Update (Ghdl_Range_E8'Size);
when others =>
-- Bounds are not known anymore.
Bounds := Null_Address;
end case;
end if;
end loop;
end Bound_To_Range;
function Get_Base_Type (Atype : Ghdl_Rti_Access) return Ghdl_Rti_Access
is
begin
case Atype.Kind is
when Ghdl_Rtik_Subtype_Scalar =>
return To_Ghdl_Rtin_Subtype_Scalar_Acc (Atype).Basetype;
when Ghdl_Rtik_Subtype_Array =>
return To_Ghdl_Rti_Access
(To_Ghdl_Rtin_Subtype_Array_Acc (Atype).Basetype);
when Ghdl_Rtik_Type_E8
| Ghdl_Rtik_Type_B2 =>
return Atype;
when others =>
Internal_Error ("rtis_addr.get_base_type");
end case;
end Get_Base_Type;
function Get_Top_Context return Rti_Context
is
Ctxt : Rti_Context;
begin
Ctxt := (Base => To_Address (Ghdl_Rti_Top_Instance),
Block => Ghdl_Rti_Top_Ptr.Parent);
return Ctxt;
end Get_Top_Context;
end Grt.Rtis_Addr;
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