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|
-- Mcode back-end for ortho - Constants handling.
-- Copyright (C) 2006 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 Tables;
with Ada.Text_IO;
with Ortho_Code.Types; use Ortho_Code.Types;
with Ortho_Code.Debug;
package body Ortho_Code.Consts is
type Cnode_Common is record
Kind : OC_Kind;
Lit_Type : O_Tnode;
end record;
for Cnode_Common use record
Kind at 0 range 0 .. 31;
Lit_Type at 4 range 0 .. 31;
end record;
for Cnode_Common'Size use 64;
type Cnode_Signed is record
Val : Integer_64;
end record;
for Cnode_Signed'Size use 64;
type Cnode_Unsigned is record
Val : Unsigned_64;
end record;
for Cnode_Unsigned'Size use 64;
type Cnode_Float is record
Val : IEEE_Float_64;
end record;
for Cnode_Float'Size use 64;
type Cnode_Enum is record
Id : O_Ident;
Val : Uns32;
end record;
for Cnode_Enum'Size use 64;
type Cnode_Addr is record
Decl : O_Dnode;
Pad : Int32;
end record;
for Cnode_Addr'Size use 64;
type Cnode_Aggr is record
Els : Int32;
Nbr : Int32;
end record;
for Cnode_Aggr'Size use 64;
type Cnode_Sizeof is record
Atype : O_Tnode;
Pad : Int32;
end record;
for Cnode_Sizeof'Size use 64;
type Cnode_Union is record
El : O_Cnode;
Field : O_Fnode;
end record;
for Cnode_Union'Size use 64;
package Cnodes is new Tables
(Table_Component_Type => Cnode_Common,
Table_Index_Type => O_Cnode,
Table_Low_Bound => 2,
Table_Initial => 128);
function Get_Const_Kind (Cst : O_Cnode) return OC_Kind is
begin
return Cnodes.Table (Cst).Kind;
end Get_Const_Kind;
function Get_Const_Type (Cst : O_Cnode) return O_Tnode is
begin
return Cnodes.Table (Cst).Lit_Type;
end Get_Const_Type;
function Get_Const_U64 (Cst : O_Cnode) return Unsigned_64
is
function To_Cnode_Unsigned is new Ada.Unchecked_Conversion
(Cnode_Common, Cnode_Unsigned);
begin
return To_Cnode_Unsigned (Cnodes.Table (Cst + 1)).Val;
end Get_Const_U64;
function Get_Const_I64 (Cst : O_Cnode) return Integer_64
is
function To_Cnode_Signed is new Ada.Unchecked_Conversion
(Cnode_Common, Cnode_Signed);
begin
return To_Cnode_Signed (Cnodes.Table (Cst + 1)).Val;
end Get_Const_I64;
function Get_Const_F64 (Cst : O_Cnode) return IEEE_Float_64
is
function To_Cnode_Float is new Ada.Unchecked_Conversion
(Cnode_Common, Cnode_Float);
begin
return To_Cnode_Float (Cnodes.Table (Cst + 1)).Val;
end Get_Const_F64;
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Cnode_Signed, Target => Cnode_Common);
function New_Signed_Literal (Ltype : O_Tnode; Value : Integer_64)
return O_Cnode
is
Res : O_Cnode;
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Signed,
Lit_Type => Ltype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Signed'(Val => Value)));
return Res;
end New_Signed_Literal;
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Unsigned_64, Target => Cnode_Common);
function New_Unsigned_Literal (Ltype : O_Tnode; Value : Unsigned_64)
return O_Cnode
is
Res : O_Cnode;
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Unsigned,
Lit_Type => Ltype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Value));
return Res;
end New_Unsigned_Literal;
-- function Get_Const_Literal (Cst : O_Cnode) return Uns32 is
-- begin
-- return Cnodes.Table (Cst).Val;
-- end Get_Const_Literal;
function To_Uns64 is new Ada.Unchecked_Conversion
(Source => Cnode_Common, Target => Uns64);
function Get_Const_U32 (Cst : O_Cnode) return Uns32 is
begin
return Uns32 (To_Uns64 (Cnodes.Table (Cst + 1)));
end Get_Const_U32;
function Get_Const_R64 (Cst : O_Cnode) return Uns64 is
begin
return To_Uns64 (Cnodes.Table (Cst + 1));
end Get_Const_R64;
function Get_Const_Low (Cst : O_Cnode) return Uns32
is
V : Uns64;
begin
V := Get_Const_R64 (Cst);
return Uns32 (V and 16#Ffff_Ffff#);
end Get_Const_Low;
function Get_Const_High (Cst : O_Cnode) return Uns32
is
V : Uns64;
begin
V := Get_Const_R64 (Cst);
return Uns32 (Shift_Right (V, 32) and 16#Ffff_Ffff#);
end Get_Const_High;
function Get_Const_Low (Cst : O_Cnode) return Int32
is
V : Uns64;
begin
V := Get_Const_R64 (Cst);
return To_Int32 (Uns32 (V and 16#Ffff_Ffff#));
end Get_Const_Low;
function Get_Const_High (Cst : O_Cnode) return Int32
is
V : Uns64;
begin
V := Get_Const_R64 (Cst);
return To_Int32 (Uns32 (Shift_Right (V, 32) and 16#Ffff_Ffff#));
end Get_Const_High;
function New_Float_Literal (Ltype : O_Tnode; Value : IEEE_Float_64)
return O_Cnode
is
Res : O_Cnode;
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Cnode_Float, Target => Cnode_Common);
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Float,
Lit_Type => Ltype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Float'(Val => Value)));
return Res;
end New_Float_Literal;
function New_Null_Access (Ltype : O_Tnode) return O_Cnode is
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Null,
Lit_Type => Ltype));
return Cnodes.Last;
end New_Null_Access;
function New_Default_Value (Ltype : O_Tnode) return O_Cnode is
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Zero,
Lit_Type => Ltype));
return Cnodes.Last;
end New_Default_Value;
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Cnode_Addr, Target => Cnode_Common);
function To_Cnode_Addr is new Ada.Unchecked_Conversion
(Source => Cnode_Common, Target => Cnode_Addr);
function New_Global_Unchecked_Address (Decl : O_Dnode; Atype : O_Tnode)
return O_Cnode
is
Res : O_Cnode;
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Address,
Lit_Type => Atype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Addr'(Decl => Decl,
Pad => 0)));
return Res;
end New_Global_Unchecked_Address;
function New_Global_Address (Decl : O_Dnode; Atype : O_Tnode)
return O_Cnode
is
Res : O_Cnode;
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Address,
Lit_Type => Atype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Addr'(Decl => Decl,
Pad => 0)));
return Res;
end New_Global_Address;
function New_Subprogram_Address (Subprg : O_Dnode; Atype : O_Tnode)
return O_Cnode
is
Res : O_Cnode;
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Subprg_Address,
Lit_Type => Atype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Addr'(Decl => Subprg,
Pad => 0)));
return Res;
end New_Subprogram_Address;
function Get_Const_Decl (Cst : O_Cnode) return O_Dnode is
begin
return To_Cnode_Addr (Cnodes.Table (Cst + 1)).Decl;
end Get_Const_Decl;
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Cnode_Enum, Target => Cnode_Common);
function To_Cnode_Enum is new Ada.Unchecked_Conversion
(Source => Cnode_Common, Target => Cnode_Enum);
--function Get_Named_Literal_Id (Lit : O_Cnode) return O_Ident is
--begin
-- return To_Cnode_Enum (Cnodes.Table (Lit + 1)).Id;
--end Get_Named_Literal_Id;
function New_Named_Literal
(Atype : O_Tnode; Id : O_Ident; Val : Uns32; Prev : O_Cnode)
return O_Cnode
is
Res : O_Cnode;
begin
Cnodes.Append (Cnode_Common'(Kind => OC_Lit,
Lit_Type => Atype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Enum'(Id => Id,
Val => Val)));
if Prev /= O_Cnode_Null then
if Prev + 2 /= Res then
raise Syntax_Error;
end if;
end if;
return Res;
end New_Named_Literal;
function Get_Lit_Ident (L : O_Cnode) return O_Ident is
begin
return To_Cnode_Enum (Cnodes.Table (L + 1)).Id;
end Get_Lit_Ident;
function Get_Lit_Value (L : O_Cnode) return Uns32 is
begin
return To_Cnode_Enum (Cnodes.Table (L + 1)).Val;
end Get_Lit_Value;
function Get_Lit_Chain (L : O_Cnode) return O_Cnode is
begin
return L + 2;
end Get_Lit_Chain;
package Els is new Tables
(Table_Component_Type => O_Cnode,
Table_Index_Type => Int32,
Table_Low_Bound => 2,
Table_Initial => 128);
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Cnode_Aggr, Target => Cnode_Common);
function To_Cnode_Aggr is new Ada.Unchecked_Conversion
(Source => Cnode_Common, Target => Cnode_Aggr);
procedure Start_Record_Aggr (List : out O_Record_Aggr_List;
Atype : O_Tnode)
is
Val : Int32;
Num : Uns32;
begin
Num := Get_Type_Record_Nbr_Fields (Atype);
Val := Els.Allocate (Integer (Num));
Cnodes.Append (Cnode_Common'(Kind => OC_Record,
Lit_Type => Atype));
List := (Res => Cnodes.Last,
Rec_Field => Get_Type_Record_Fields (Atype),
El => Val);
Cnodes.Append (To_Cnode_Common (Cnode_Aggr'(Els => Val,
Nbr => Int32 (Num))));
end Start_Record_Aggr;
procedure New_Record_Aggr_El (List : in out O_Record_Aggr_List;
Value : O_Cnode)
is
begin
Els.Table (List.El) := Value;
List.El := List.El + 1;
end New_Record_Aggr_El;
procedure Finish_Record_Aggr (List : in out O_Record_Aggr_List;
Res : out O_Cnode) is
begin
Res := List.Res;
end Finish_Record_Aggr;
procedure Start_Array_Aggr (List : out O_Array_Aggr_List; Atype : O_Tnode)
is
Num : constant Uns32 := Get_Type_Subarray_Length (Atype);
Val : Int32;
begin
Val := Els.Allocate (Integer (Num));
Cnodes.Append (Cnode_Common'(Kind => OC_Array,
Lit_Type => Atype));
List := (Res => Cnodes.Last,
El => Val,
Len => Num);
Cnodes.Append (To_Cnode_Common (Cnode_Aggr'(Els => Val,
Nbr => Int32 (Num))));
end Start_Array_Aggr;
procedure New_Array_Aggr_El (List : in out O_Array_Aggr_List;
Value : O_Cnode) is
begin
pragma Assert (List.Len > 0);
List.Len := List.Len - 1;
Els.Table (List.El) := Value;
List.El := List.El + 1;
end New_Array_Aggr_El;
procedure Finish_Array_Aggr (List : in out O_Array_Aggr_List;
Res : out O_Cnode) is
begin
pragma Assert (List.Len = 0);
Res := List.Res;
end Finish_Array_Aggr;
function Get_Const_Aggr_Length (Cst : O_Cnode) return Int32 is
begin
return To_Cnode_Aggr (Cnodes.Table (Cst + 1)).Nbr;
end Get_Const_Aggr_Length;
function Get_Const_Aggr_Element (Cst : O_Cnode; N : Int32) return O_Cnode
is
El : Int32;
begin
El := To_Cnode_Aggr (Cnodes.Table (Cst + 1)).Els;
return Els.Table (El + N);
end Get_Const_Aggr_Element;
function New_Union_Aggr (Atype : O_Tnode; Field : O_Fnode; Value : O_Cnode)
return O_Cnode
is
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Cnode_Union, Target => Cnode_Common);
Res : O_Cnode;
begin
if Debug.Flag_Debug_Hli then
Cnodes.Append (Cnode_Common'(Kind => OC_Union,
Lit_Type => Atype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Union'(El => Value,
Field => Field)));
return Res;
else
return Value;
end if;
end New_Union_Aggr;
function To_Cnode_Union is new Ada.Unchecked_Conversion
(Source => Cnode_Common, Target => Cnode_Union);
function Get_Const_Union_Field (Cst : O_Cnode) return O_Fnode is
begin
return To_Cnode_Union (Cnodes.Table (Cst + 1)).Field;
end Get_Const_Union_Field;
function Get_Const_Union_Value (Cst : O_Cnode) return O_Cnode is
begin
return To_Cnode_Union (Cnodes.Table (Cst + 1)).El;
end Get_Const_Union_Value;
function New_Sizeof (Atype : O_Tnode; Rtype : O_Tnode) return O_Cnode
is
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Cnode_Sizeof, Target => Cnode_Common);
Res : O_Cnode;
begin
if Debug.Flag_Debug_Hli then
Cnodes.Append (Cnode_Common'(Kind => OC_Sizeof,
Lit_Type => Rtype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Sizeof'(Atype => Atype,
Pad => 0)));
return Res;
else
return New_Unsigned_Literal
(Rtype, Unsigned_64 (Get_Type_Size (Atype)));
end if;
end New_Sizeof;
function Get_Sizeof_Type (Cst : O_Cnode) return O_Tnode
is
function To_Cnode_Sizeof is new Ada.Unchecked_Conversion
(Cnode_Common, Cnode_Sizeof);
begin
return To_Cnode_Sizeof (Cnodes.Table (Cst + 1)).Atype;
end Get_Sizeof_Type;
function New_Alignof (Atype : O_Tnode; Rtype : O_Tnode) return O_Cnode
is
function To_Cnode_Common is new Ada.Unchecked_Conversion
(Source => Cnode_Sizeof, Target => Cnode_Common);
Res : O_Cnode;
begin
if Debug.Flag_Debug_Hli then
Cnodes.Append (Cnode_Common'(Kind => OC_Alignof,
Lit_Type => Rtype));
Res := Cnodes.Last;
Cnodes.Append (To_Cnode_Common (Cnode_Sizeof'(Atype => Atype,
Pad => 0)));
return Res;
else
return New_Unsigned_Literal
(Rtype, Unsigned_64 (Get_Type_Align_Bytes (Atype)));
end if;
end New_Alignof;
function Get_Alignof_Type (Cst : O_Cnode) return O_Tnode
is
function To_Cnode_Sizeof is new Ada.Unchecked_Conversion
(Cnode_Common, Cnode_Sizeof);
begin
return To_Cnode_Sizeof (Cnodes.Table (Cst + 1)).Atype;
end Get_Alignof_Type;
function New_Offsetof (Rec_Type : O_Tnode; Field : O_Fnode; Rtype : O_Tnode)
return O_Cnode is
begin
if Get_Field_Parent (Field) /= Rec_Type then
raise Syntax_Error;
end if;
return New_Unsigned_Literal
(Rtype, Unsigned_64 (Get_Field_Offset (Field)));
end New_Offsetof;
procedure Get_Const_Bytes (Cst : O_Cnode; H, L : out Uns32) is
begin
case Get_Const_Kind (Cst) is
when OC_Signed
| OC_Unsigned
| OC_Float =>
H := Get_Const_High (Cst);
L := Get_Const_Low (Cst);
when OC_Null =>
H := 0;
L := 0;
when OC_Lit =>
H := 0;
L := To_Cnode_Enum (Cnodes.Table (Cst + 1)).Val;
when OC_Array
| OC_Record
| OC_Union
| OC_Sizeof
| OC_Alignof
| OC_Address
| OC_Subprg_Address
| OC_Zero =>
raise Syntax_Error;
end case;
end Get_Const_Bytes;
procedure Mark (M : out Mark_Type) is
begin
M.Cnode := Cnodes.Last;
M.Els := Els.Last;
end Mark;
procedure Release (M : Mark_Type) is
begin
Cnodes.Set_Last (M.Cnode);
Els.Set_Last (M.Els);
end Release;
procedure Disp_Stats
is
use Ada.Text_IO;
begin
Put_Line ("Number of Cnodes: " & O_Cnode'Image (Cnodes.Last));
Put_Line ("Number of Cnodes-Els: " & Int32'Image (Els.Last));
end Disp_Stats;
procedure Finish is
begin
Cnodes.Free;
Els.Free;
end Finish;
end Ortho_Code.Consts;
|