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|
-- Values in synthesis.
-- Copyright (C) 2017 Tristan Gingold
--
-- This file is part of GHDL.
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
-- MA 02110-1301, USA.
with Ada.Unchecked_Conversion;
with System; use System;
with System.Storage_Elements;
with Mutils; use Mutils;
package body Synth.Objtypes is
function To_Bound_Array_Acc is new Ada.Unchecked_Conversion
(System.Address, Bound_Array_Acc);
function To_Rec_El_Array_Acc is new Ada.Unchecked_Conversion
(System.Address, Rec_El_Array_Acc);
function To_Type_Acc is new Ada.Unchecked_Conversion
(System.Address, Type_Acc);
function "+" (L, R : Value_Offsets) return Value_Offsets is
begin
return (L.Net_Off + R.Net_Off, L.Mem_Off + R.Mem_Off);
end "+";
function Is_Bounded_Type (Typ : Type_Acc) return Boolean is
begin
case Typ.Kind is
when Type_Bit
| Type_Logic
| Type_Discrete
| Type_Float
| Type_Vector
| Type_Slice
| Type_Array
| Type_Record
| Type_Access
| Type_File =>
return True;
when Type_Unbounded_Array
| Type_Unbounded_Vector
| Type_Unbounded_Record
| Type_Protected =>
return False;
end case;
end Is_Bounded_Type;
function Are_Types_Equal (L, R : Type_Acc) return Boolean is
begin
if L.Kind /= R.Kind
or else L.W /= R.W
then
return False;
end if;
if L = R then
return True;
end if;
case L.Kind is
when Type_Bit
| Type_Logic =>
return True;
when Type_Discrete =>
return L.Drange = R.Drange;
when Type_Float =>
return L.Frange = R.Frange;
when Type_Vector =>
return L.Vbound = R.Vbound
and then Are_Types_Equal (L.Vec_El, R.Vec_El);
when Type_Unbounded_Vector =>
return Are_Types_Equal (L.Uvec_El, R.Uvec_El);
when Type_Slice =>
return Are_Types_Equal (L.Slice_El, R.Slice_El);
when Type_Array =>
if L.Abounds.Ndim /= R.Abounds.Ndim then
return False;
end if;
for I in L.Abounds.D'Range loop
if L.Abounds.D (I) /= R.Abounds.D (I) then
return False;
end if;
end loop;
return Are_Types_Equal (L.Arr_El, R.Arr_El);
when Type_Unbounded_Array =>
return L.Uarr_Ndim = R.Uarr_Ndim
and then Are_Types_Equal (L.Uarr_El, R.Uarr_El);
when Type_Record
| Type_Unbounded_Record =>
if L.Rec.Len /= R.Rec.Len then
return False;
end if;
for I in L.Rec.E'Range loop
if not Are_Types_Equal (L.Rec.E (I).Typ, R.Rec.E (I).Typ) then
return False;
end if;
end loop;
return True;
when Type_Access =>
return Are_Types_Equal (L.Acc_Acc, R.Acc_Acc);
when Type_File =>
return Are_Types_Equal (L.File_Typ, R.File_Typ);
when Type_Protected =>
return False;
end case;
end Are_Types_Equal;
function Discrete_Range_Width (Rng : Discrete_Range_Type) return Width
is
Lo, Hi : Int64;
W : Width;
begin
case Rng.Dir is
when Dir_To =>
Lo := Rng.Left;
Hi := Rng.Right;
when Dir_Downto =>
Lo := Rng.Right;
Hi := Rng.Left;
end case;
if Lo > Hi then
-- Null range.
W := 0;
elsif Lo >= 0 then
-- Positive.
W := Width (Clog2 (Uns64 (Hi) + 1));
elsif Lo = Int64'First then
-- Handle possible overflow.
W := 64;
elsif Hi < 0 then
-- Negative only.
W := Width (Clog2 (Uns64 (-Lo))) + 1;
else
declare
Wl : constant Width := Width (Clog2 (Uns64 (-Lo)));
Wh : constant Width := Width (Clog2 (Uns64 (Hi)));
begin
W := Width'Max (Wl, Wh) + 1;
end;
end if;
return W;
end Discrete_Range_Width;
function Create_Bit_Type return Type_Acc
is
subtype Bit_Type_Type is Type_Type (Type_Bit);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Bit_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Bit,
Is_Synth => True,
Al => 0,
Sz => 1,
W => 1)));
end Create_Bit_Type;
function Create_Logic_Type return Type_Acc
is
subtype Logic_Type_Type is Type_Type (Type_Logic);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Logic_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Logic,
Is_Synth => True,
Al => 0,
Sz => 1,
W => 1)));
end Create_Logic_Type;
function Create_Discrete_Type (Rng : Discrete_Range_Type;
Sz : Size_Type;
W : Width)
return Type_Acc
is
subtype Discrete_Type_Type is Type_Type (Type_Discrete);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Discrete_Type_Type);
Al : Palign_Type;
begin
if Sz <= 1 then
Al := 0;
elsif Sz <= 4 then
Al := 2;
else
pragma Assert (Sz <= 8);
Al := 3;
end if;
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Discrete,
Is_Synth => True,
Al => Al,
Sz => Sz,
W => W,
Drange => Rng)));
end Create_Discrete_Type;
function Create_Float_Type (Rng : Float_Range_Type) return Type_Acc
is
subtype Float_Type_Type is Type_Type (Type_Float);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Float_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Float,
Is_Synth => True,
Al => 3,
Sz => 8,
W => 64,
Frange => Rng)));
end Create_Float_Type;
function Create_Vector_Type (Bnd : Bound_Type; El_Type : Type_Acc)
return Type_Acc
is
subtype Vector_Type_Type is Type_Type (Type_Vector);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Vector_Type_Type);
begin
return To_Type_Acc
(Alloc (Current_Pool, (Kind => Type_Vector,
Is_Synth => True,
Al => El_Type.Al,
Sz => El_Type.Sz * Size_Type (Bnd.Len),
W => Bnd.Len,
Vbound => Bnd,
Vec_El => El_Type)));
end Create_Vector_Type;
function Create_Slice_Type (Len : Uns32; El_Type : Type_Acc)
return Type_Acc
is
subtype Slice_Type_Type is Type_Type (Type_Slice);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Slice_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool,
(Kind => Type_Slice,
Is_Synth => El_Type.Is_Synth,
Al => El_Type.Al,
Sz => Size_Type (Len) * El_Type.Sz,
W => Len * El_Type.W,
Slice_El => El_Type)));
end Create_Slice_Type;
function Create_Vec_Type_By_Length (Len : Width; El : Type_Acc)
return Type_Acc is
begin
return Create_Vector_Type ((Dir => Dir_Downto,
Left => Int32 (Len) - 1,
Right => 0,
Len => Len),
El);
end Create_Vec_Type_By_Length;
function Create_Bound_Array (Ndims : Dim_Type) return Bound_Array_Acc
is
subtype Data_Type is Bound_Array (Ndims);
Res : Address;
begin
-- Manually allocate the array to handle large arrays without
-- creating a large temporary value.
Areapools.Allocate
(Current_Pool.all, Res,
Data_Type'Size / Storage_Unit, Data_Type'Alignment);
declare
-- Discard the warnings for no pragma Import as we really want
-- to use the default initialization.
pragma Warnings (Off);
Addr1 : constant Address := Res;
Init : Data_Type;
for Init'Address use Addr1;
pragma Warnings (On);
begin
null;
end;
return To_Bound_Array_Acc (Res);
end Create_Bound_Array;
function Create_Array_Type (Bnd : Bound_Array_Acc; El_Type : Type_Acc)
return Type_Acc
is
subtype Array_Type_Type is Type_Type (Type_Array);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Array_Type_Type);
L : Uns32;
begin
L := 1;
for I in Bnd.D'Range loop
L := L * Bnd.D (I).Len;
end loop;
return To_Type_Acc (Alloc (Current_Pool,
(Kind => Type_Array,
Is_Synth => El_Type.Is_Synth,
Al => El_Type.Al,
Sz => El_Type.Sz * Size_Type (L),
W => El_Type.W * L,
Abounds => Bnd,
Arr_El => El_Type)));
end Create_Array_Type;
function Create_Unbounded_Array (Ndim : Dim_Type; El_Type : Type_Acc)
return Type_Acc
is
subtype Unbounded_Type_Type is Type_Type (Type_Unbounded_Array);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Unbounded_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Unbounded_Array,
Is_Synth => El_Type.Is_Synth,
Al => El_Type.Al,
Sz => 0,
W => 0,
Uarr_Ndim => Ndim,
Uarr_El => El_Type)));
end Create_Unbounded_Array;
function Create_Unbounded_Vector (El_Type : Type_Acc) return Type_Acc
is
subtype Unbounded_Type_Type is Type_Type (Type_Unbounded_Vector);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Unbounded_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Unbounded_Vector,
Is_Synth => El_Type.Is_Synth,
Al => El_Type.Al,
Sz => 0,
W => 0,
Uvec_El => El_Type)));
end Create_Unbounded_Vector;
function Get_Array_Element (Arr_Type : Type_Acc) return Type_Acc is
begin
case Arr_Type.Kind is
when Type_Vector =>
return Arr_Type.Vec_El;
when Type_Array =>
return Arr_Type.Arr_El;
when Type_Unbounded_Array =>
return Arr_Type.Uarr_El;
when Type_Unbounded_Vector =>
return Arr_Type.Uvec_El;
when others =>
raise Internal_Error;
end case;
end Get_Array_Element;
function Get_Array_Bound (Typ : Type_Acc; Dim : Dim_Type)
return Bound_Type is
begin
case Typ.Kind is
when Type_Vector =>
if Dim /= 1 then
raise Internal_Error;
end if;
return Typ.Vbound;
when Type_Array =>
return Typ.Abounds.D (Dim);
when others =>
raise Internal_Error;
end case;
end Get_Array_Bound;
function Get_Range_Length (Rng : Discrete_Range_Type) return Uns32
is
Len : Int64;
begin
case Rng.Dir is
when Dir_To =>
Len := Rng.Right - Rng.Left + 1;
when Dir_Downto =>
Len := Rng.Left - Rng.Right + 1;
end case;
if Len < 0 then
return 0;
else
return Uns32 (Len);
end if;
end Get_Range_Length;
function Create_Rec_El_Array (Nels : Iir_Index32) return Rec_El_Array_Acc
is
subtype Data_Type is Rec_El_Array (Nels);
Res : Address;
begin
-- Manually allocate the array to handle large arrays without
-- creating a large temporary value.
Areapools.Allocate
(Current_Pool.all, Res,
Data_Type'Size / Storage_Unit, Data_Type'Alignment);
declare
-- Discard the warnings for no pragma Import as we really want
-- to use the default initialization.
pragma Warnings (Off);
Addr1 : constant Address := Res;
Init : Data_Type;
for Init'Address use Addr1;
pragma Warnings (On);
begin
null;
end;
return To_Rec_El_Array_Acc (Res);
end Create_Rec_El_Array;
function Align (Off : Size_Type; Al : Palign_Type) return Size_Type
is
Mask : constant Size_Type := 2 ** Natural (Al) - 1;
begin
return (Off + Mask) and not Mask;
end Align;
function Create_Record_Type (Els : Rec_El_Array_Acc)
return Type_Acc
is
subtype Record_Type_Type is Type_Type (Type_Record);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Record_Type_Type);
Is_Synth : Boolean;
W : Width;
Al : Palign_Type;
Sz : Size_Type;
begin
-- Layout the record.
Is_Synth := True;
Al := 0;
Sz := 0;
W := 0;
for I in Els.E'Range loop
declare
E : Rec_El_Type renames Els.E (I);
begin
-- For nets.
E.Boff := W;
Is_Synth := Is_Synth and E.Typ.Is_Synth;
W := W + E.Typ.W;
-- For memory.
Al := Palign_Type'Max (Al, E.Typ.Al);
Sz := Align (Sz, E.Typ.Al);
E.Moff := Sz;
Sz := Sz + E.Typ.Sz;
end;
end loop;
Sz := Align (Sz, Al);
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Record,
Is_Synth => Is_Synth,
Al => Al,
Sz => Sz,
W => W,
Rec => Els)));
end Create_Record_Type;
function Create_Unbounded_Record (Els : Rec_El_Array_Acc) return Type_Acc
is
subtype Unbounded_Record_Type_Type is Type_Type (Type_Unbounded_Record);
function Alloc is
new Areapools.Alloc_On_Pool_Addr (Unbounded_Record_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Unbounded_Record,
Is_Synth => True,
Al => 0,
Sz => 0,
W => 0,
Rec => Els)));
end Create_Unbounded_Record;
function Create_Access_Type (Acc_Type : Type_Acc) return Type_Acc
is
subtype Access_Type_Type is Type_Type (Type_Access);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Access_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Access,
Is_Synth => False,
Al => 2,
Sz => 4,
W => 32,
Acc_Acc => Acc_Type)));
end Create_Access_Type;
function Create_File_Type (File_Type : Type_Acc) return Type_Acc
is
subtype File_Type_Type is Type_Type (Type_File);
function Alloc is new Areapools.Alloc_On_Pool_Addr (File_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_File,
Is_Synth => False,
Al => 2,
Sz => 4,
W => 32,
File_Typ => File_Type)));
end Create_File_Type;
function Create_Protected_Type return Type_Acc
is
subtype Protected_Type_Type is Type_Type (Type_Protected);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Protected_Type_Type);
begin
return To_Type_Acc (Alloc (Current_Pool, (Kind => Type_Protected,
Is_Synth => False,
Al => 2,
Sz => 4,
W => 32)));
end Create_Protected_Type;
function Vec_Length (Typ : Type_Acc) return Iir_Index32 is
begin
return Iir_Index32 (Typ.Vbound.Len);
end Vec_Length;
function Get_Array_Flat_Length (Typ : Type_Acc) return Iir_Index32 is
begin
case Typ.Kind is
when Type_Vector =>
return Iir_Index32 (Typ.Vbound.Len);
when Type_Array =>
declare
Len : Width;
begin
Len := 1;
for I in Typ.Abounds.D'Range loop
Len := Len * Typ.Abounds.D (I).Len;
end loop;
return Iir_Index32 (Len);
end;
when others =>
raise Internal_Error;
end case;
end Get_Array_Flat_Length;
function Get_Type_Width (Atype : Type_Acc) return Width is
begin
pragma Assert (Atype.Kind /= Type_Unbounded_Array);
return Atype.W;
end Get_Type_Width;
function Get_Bound_Length (T : Type_Acc; Dim : Dim_Type) return Width is
begin
case T.Kind is
when Type_Vector =>
if Dim /= 1 then
raise Internal_Error;
end if;
return T.Vbound.Len;
when Type_Slice =>
if Dim /= 1 then
raise Internal_Error;
end if;
return T.W;
when Type_Array =>
return T.Abounds.D (Dim).Len;
when others =>
raise Internal_Error;
end case;
end Get_Bound_Length;
function Is_Matching_Bounds (L, R : Type_Acc) return Boolean is
begin
case L.Kind is
when Type_Bit
| Type_Logic
| Type_Discrete
| Type_Float =>
pragma Assert (L.Kind = R.Kind);
return True;
when Type_Vector
| Type_Slice =>
return Get_Bound_Length (L, 1) = Get_Bound_Length (R, 1);
when Type_Array =>
for I in L.Abounds.D'Range loop
if Get_Bound_Length (L, I) /= Get_Bound_Length (R, I) then
return False;
end if;
end loop;
return True;
when Type_Unbounded_Array
| Type_Unbounded_Vector
| Type_Unbounded_Record =>
raise Internal_Error;
when Type_Record =>
-- FIXME: handle vhdl-08
return True;
when Type_Access =>
return True;
when Type_File
| Type_Protected =>
raise Internal_Error;
end case;
end Is_Matching_Bounds;
-- For conversions use Address to avoidcompiler warnings about alignment.
function To_Address is new Ada.Unchecked_Conversion
(Memory_Ptr, Address);
function To_Memory_Ptr is new Ada.Unchecked_Conversion
(Address, Memory_Ptr);
type Ghdl_U8_Ptr is access all Ghdl_U8;
function To_U8_Ptr is
new Ada.Unchecked_Conversion (Address, Ghdl_U8_Ptr);
procedure Write_U8 (Mem : Memory_Ptr; Val : Ghdl_U8) is
begin
To_U8_Ptr (To_Address (Mem)).all := Val;
end Write_U8;
function Read_U8 (Mem : Memory_Ptr) return Ghdl_U8 is
begin
return To_U8_Ptr (To_Address (Mem)).all;
end Read_U8;
function Read_U8 (Mt : Memtyp) return Ghdl_U8
is
pragma Assert (Mt.Typ.Sz = 1);
begin
return Read_U8 (Mt.Mem);
end Read_U8;
type Ghdl_I32_Ptr is access all Ghdl_I32;
function To_I32_Ptr is
new Ada.Unchecked_Conversion (Address, Ghdl_I32_Ptr);
procedure Write_I32 (Mem : Memory_Ptr; Val : Ghdl_I32) is
begin
To_I32_Ptr (To_Address (Mem)).all := Val;
end Write_I32;
function Read_I32 (Mem : Memory_Ptr) return Ghdl_I32 is
begin
return To_I32_Ptr (To_Address (Mem)).all;
end Read_I32;
type Ghdl_U32_Ptr is access all Ghdl_U32;
function To_U32_Ptr is
new Ada.Unchecked_Conversion (Address, Ghdl_U32_Ptr);
procedure Write_U32 (Mem : Memory_Ptr; Val : Ghdl_U32) is
begin
To_U32_Ptr (To_Address (Mem)).all := Val;
end Write_U32;
function Read_U32 (Mem : Memory_Ptr) return Ghdl_U32 is
begin
return To_U32_Ptr (To_Address (Mem)).all;
end Read_U32;
type Ghdl_I64_Ptr is access all Ghdl_I64;
function To_I64_Ptr is
new Ada.Unchecked_Conversion (Address, Ghdl_I64_Ptr);
procedure Write_I64 (Mem : Memory_Ptr; Val : Ghdl_I64) is
begin
To_I64_Ptr (To_Address (Mem)).all := Val;
end Write_I64;
function Read_I64 (Mem : Memory_Ptr) return Ghdl_I64 is
begin
return To_I64_Ptr (To_Address (Mem)).all;
end Read_I64;
type Fp64_Ptr is access all Fp64;
function To_Fp64_Ptr is
new Ada.Unchecked_Conversion (Address, Fp64_Ptr);
procedure Write_Fp64 (Mem : Memory_Ptr; Val : Fp64) is
begin
To_Fp64_Ptr (To_Address (Mem)).all := Val;
end Write_Fp64;
function Read_Fp64 (Mem : Memory_Ptr) return Fp64 is
begin
return To_Fp64_Ptr (To_Address (Mem)).all;
end Read_Fp64;
function Read_Fp64 (Mt : Memtyp) return Fp64 is
begin
return Read_Fp64 (Mt.Mem);
end Read_Fp64;
function "+" (Base : Memory_Ptr; Off : Size_Type) return Memory_Ptr
is
use System.Storage_Elements;
begin
return To_Memory_Ptr (To_Address (Base) + Storage_Offset (Off));
end "+";
function Read_Discrete (Mt : Memtyp) return Int64 is
begin
case Mt.Typ.Sz is
when 1 =>
return Int64 (Read_U8 (Mt.Mem));
when 4 =>
return Int64 (Read_I32 (Mt.Mem));
when 8 =>
return Int64 (Read_I64 (Mt.Mem));
when others =>
raise Internal_Error;
end case;
end Read_Discrete;
procedure Write_Discrete (Mem : Memory_Ptr; Typ : Type_Acc; Val : Int64) is
begin
case Typ.Sz is
when 1 =>
Write_U8 (Mem, Ghdl_U8 (Val));
when 4 =>
Write_I32 (Mem, Ghdl_I32 (Val));
when 8 =>
Write_I64 (Mem, Ghdl_I64 (Val));
when others =>
raise Internal_Error;
end case;
end Write_Discrete;
function Alloc_Memory (Vtype : Type_Acc) return Memory_Ptr
is
function To_Memory_Ptr is new Ada.Unchecked_Conversion
(System.Address, Memory_Ptr);
M : System.Address;
begin
Areapools.Allocate (Current_Pool.all, M,
Vtype.Sz, Size_Type (2 ** Natural (Vtype.Al)));
return To_Memory_Ptr (M);
end Alloc_Memory;
function Create_Memory (Vtype : Type_Acc) return Memtyp is
begin
return (Vtype, Alloc_Memory (Vtype));
end Create_Memory;
function Create_Memory_U8 (Val : Ghdl_U8; Vtype : Type_Acc)
return Memtyp
is
pragma Assert (Vtype.Sz = 1);
Res : Memory_Ptr;
begin
Res := Alloc_Memory (Vtype);
Write_U8 (Res, Val);
return (Vtype, Res);
end Create_Memory_U8;
function Create_Memory_Fp64 (Val : Fp64; Vtype : Type_Acc)
return Memtyp
is
pragma Assert (Vtype.Sz = 8);
Res : Memory_Ptr;
begin
Res := Alloc_Memory (Vtype);
Write_Fp64 (Res, Val);
return (Vtype, Res);
end Create_Memory_Fp64;
function Create_Memory_Discrete (Val : Int64; Vtype : Type_Acc)
return Memtyp
is
Res : Memory_Ptr;
begin
Res := Alloc_Memory (Vtype);
case Vtype.Sz is
when 1 =>
Write_U8 (Res, Ghdl_U8 (Val));
when 4 =>
Write_I32 (Res, Ghdl_I32 (Val));
when 8 =>
Write_I64 (Res, Ghdl_I64 (Val));
when others =>
raise Internal_Error;
end case;
return (Vtype, Res);
end Create_Memory_Discrete;
function Is_Equal (L, R : Memtyp) return Boolean is
begin
if L = R then
return True;
end if;
if L.Typ.Sz /= R.Typ.Sz then
return False;
end if;
-- FIXME: not correct for records, not correct for floats!
for I in 1 .. L.Typ.Sz loop
if L.Mem (I - 1) /= R.Mem (I - 1) then
return False;
end if;
end loop;
return True;
end Is_Equal;
procedure Copy_Memory (Dest : Memory_Ptr; Src : Memory_Ptr; Sz : Size_Type)
is
begin
for I in 1 .. Sz loop
Dest (I - 1) := Src (I - 1);
end loop;
end Copy_Memory;
function Unshare (Src : Memtyp) return Memtyp
is
Res : Memory_Ptr;
begin
Res := Alloc_Memory (Src.Typ);
Copy_Memory (Res, Src.Mem, Src.Typ.Sz);
return (Src.Typ, Res);
end Unshare;
Bit0_Mem : constant Memory_Element := 0;
Bit1_Mem : constant Memory_Element := 1;
procedure Init is
begin
Instance_Pool := Global_Pool'Access;
Boolean_Type := Create_Bit_Type;
Logic_Type := Create_Logic_Type;
Bit_Type := Create_Bit_Type;
Bit0 := (Bit_Type, To_Memory_Ptr (Bit0_Mem'Address));
Bit1 := (Bit_Type, To_Memory_Ptr (Bit1_Mem'Address));
end Init;
end Synth.Objtypes;
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