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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 Types; use Types;
with Areapools; use Areapools;
with Netlists; use Netlists;
with Grt.Types; use Grt.Types;
with Vhdl.Nodes; use Vhdl.Nodes;
package Synth.Objtypes is
type Discrete_Range_Type is record
-- An integer range.
Dir : Iir_Direction;
-- Netlist representation: signed or unsigned, width of vector.
Is_Signed : Boolean;
Left : Int64;
Right : Int64;
end record;
-- Return the width of RNG.
function Discrete_Range_Width (Rng : Discrete_Range_Type) return Width;
type Float_Range_Type is record
Dir : Iir_Direction;
Left : Fp64;
Right : Fp64;
end record;
type Bound_Type is record
Dir : Iir_Direction;
Left : Int32;
Right : Int32;
Len : Width;
end record;
type Bound_Array_Type is array (Dim_Type range <>) of Bound_Type;
type Bound_Array (Ndim : Dim_Type) is record
D : Bound_Array_Type (1 .. Ndim);
end record;
type Bound_Array_Acc is access Bound_Array;
type Type_Kind is
(
Type_Bit,
Type_Logic,
Type_Discrete,
Type_Float,
Type_Vector,
Type_Unbounded_Vector,
-- A slice is for a slice of vector with dynamic bounds. So the bounds
-- of the result aren't known, but its width is.
Type_Slice,
Type_Array,
Type_Unbounded_Array,
Type_Record,
Type_Access,
Type_File,
Type_Protected
);
subtype Type_Nets is Type_Kind range Type_Bit .. Type_Logic;
type Type_Type (Kind : Type_Kind);
type Type_Acc is access Type_Type;
type Rec_El_Type is record
-- Bit offset: offset of the element in a net.
Boff : Uns32;
-- Memory offset: offset of the element in memory.
Moff : Size_Type;
-- Type of the element.
Typ : Type_Acc;
end record;
type Rec_El_Array_Type is array (Iir_Index32 range <>) of Rec_El_Type;
type Rec_El_Array (Len : Iir_Index32) is record
E : Rec_El_Array_Type (1 .. Len);
end record;
type Rec_El_Array_Acc is access Rec_El_Array;
-- Power of 2 alignment.
type Palign_Type is range 0 .. 3;
type Type_Type (Kind : Type_Kind) is record
-- False if the type is not synthesisable: is or contains access/file.
Is_Synth : Boolean;
-- Alignment (in bytes) for this type.
Al : Palign_Type;
-- Number of bytes (when in memory) for this type.
Sz : Size_Type;
-- Number of bits (when in a net) for this type.
W : Width;
case Kind is
when Type_Bit
| Type_Logic =>
null;
when Type_Discrete =>
Drange : Discrete_Range_Type;
when Type_Float =>
Frange : Float_Range_Type;
when Type_Vector =>
Vbound : Bound_Type;
Vec_El : Type_Acc;
when Type_Unbounded_Vector =>
Uvec_El : Type_Acc;
when Type_Slice =>
Slice_El : Type_Acc;
when Type_Array =>
Abounds : Bound_Array_Acc;
Arr_El : Type_Acc;
when Type_Unbounded_Array =>
Uarr_Ndim : Dim_Type;
Uarr_El : Type_Acc;
when Type_Record =>
Rec : Rec_El_Array_Acc;
when Type_Access =>
Acc_Acc : Type_Acc;
when Type_File =>
File_Typ : Type_Acc;
when Type_Protected =>
null;
end case;
end record;
type Memory_Element is mod 2**8;
type Memory_Array is array (Size_Type range <>) of Memory_Element;
-- Thin pointer for a generic pointer.
type Memory_Ptr is access all Memory_Array (Size_Type);
pragma No_Strict_Aliasing (Memory_Ptr);
type Memtyp is record
Typ : Type_Acc;
Mem : Memory_Ptr;
end record;
Null_Memtyp : constant Memtyp := (null, null);
-- Offsets for a value.
type Value_Offsets is record
Net_Off : Uns32;
Mem_Off : Size_Type;
end record;
No_Value_Offsets : constant Value_Offsets := (0, 0);
function "+" (L, R : Value_Offsets) return Value_Offsets;
Global_Pool : aliased Areapool;
Expr_Pool : aliased Areapool;
-- Areapool used by Create_*_Value
Current_Pool : Areapool_Acc := Expr_Pool'Access;
-- Pool for objects allocated in the current instance.
Instance_Pool : Areapool_Acc;
-- Types.
function Create_Discrete_Type (Rng : Discrete_Range_Type;
Sz : Size_Type;
W : Width)
return Type_Acc;
function Create_Float_Type (Rng : Float_Range_Type) return Type_Acc;
function Create_Vec_Type_By_Length (Len : Width; El : Type_Acc)
return Type_Acc;
function Create_Vector_Type (Bnd : Bound_Type; El_Type : Type_Acc)
return Type_Acc;
function Create_Unbounded_Vector (El_Type : Type_Acc) return Type_Acc;
function Create_Slice_Type (Len : Uns32; El_Type : Type_Acc)
return Type_Acc;
function Create_Bound_Array (Ndims : Dim_Type) return Bound_Array_Acc;
function Create_Array_Type (Bnd : Bound_Array_Acc; El_Type : Type_Acc)
return Type_Acc;
function Create_Unbounded_Array (Ndim : Dim_Type; El_Type : Type_Acc)
return Type_Acc;
function Create_Rec_El_Array (Nels : Iir_Index32) return Rec_El_Array_Acc;
function Create_Record_Type (Els : Rec_El_Array_Acc) return Type_Acc;
function Create_Access_Type (Acc_Type : Type_Acc) return Type_Acc;
function Create_File_Type (File_Type : Type_Acc) return Type_Acc;
function Create_Protected_Type return Type_Acc;
-- Return the bounds of dimension DIM of a vector/array. For a vector,
-- DIM must be 1.
function Get_Array_Bound (Typ : Type_Acc; Dim : Dim_Type)
return Bound_Type;
-- Return the length of RNG.
function Get_Range_Length (Rng : Discrete_Range_Type) return Uns32;
-- Return the element of a vector/array/unbounded_array.
function Get_Array_Element (Arr_Type : Type_Acc) return Type_Acc;
function Is_Bounded_Type (Typ : Type_Acc) return Boolean;
function Are_Types_Equal (L, R : Type_Acc) return Boolean;
-- Return the length of a vector type.
function Vec_Length (Typ : Type_Acc) return Iir_Index32;
-- Get the number of indexes in array type TYP without counting
-- sub-elements.
function Get_Array_Flat_Length (Typ : Type_Acc) return Iir_Index32;
-- Return length of dimension DIM of type T.
function Get_Bound_Length (T : Type_Acc; Dim : Dim_Type) return Width;
function Is_Matching_Bounds (L, R : Type_Acc) return Boolean;
function Get_Type_Width (Atype : Type_Acc) return Width;
-- Low-level functions.
function "+" (Base : Memory_Ptr; Off : Size_Type) return Memory_Ptr;
procedure Write_U8 (Mem : Memory_Ptr; Val : Ghdl_U8);
function Read_U8 (Mem : Memory_Ptr) return Ghdl_U8;
function Read_U8 (Mt : Memtyp) return Ghdl_U8;
procedure Write_U32 (Mem : Memory_Ptr; Val : Ghdl_U32);
function Read_U32 (Mem : Memory_Ptr) return Ghdl_U32;
procedure Write_I32 (Mem : Memory_Ptr; Val : Ghdl_I32);
function Read_I32 (Mem : Memory_Ptr) return Ghdl_I32;
procedure Write_I64 (Mem : Memory_Ptr; Val : Ghdl_I64);
function Read_I64 (Mem : Memory_Ptr) return Ghdl_I64;
procedure Write_Fp64 (Mem : Memory_Ptr; Val : Fp64);
function Read_Fp64 (Mem : Memory_Ptr) return Fp64;
function Read_Fp64 (Mt : Memtyp) return Fp64;
procedure Write_Discrete (Mem : Memory_Ptr; Typ : Type_Acc; Val : Int64);
function Read_Discrete (Mt : Memtyp) return Int64;
-- Memory allocation.
function Create_Memory_U8 (Val : Ghdl_U8; Vtype : Type_Acc)
return Memtyp;
function Create_Memory_Fp64 (Val : Fp64; Vtype : Type_Acc)
return Memtyp;
function Create_Memory_Discrete (Val : Int64; Vtype : Type_Acc)
return Memtyp;
function Create_Memory (Vtype : Type_Acc) return Memtyp;
procedure Init;
-- Set by Init.
Boolean_Type : Type_Acc := null;
Logic_Type : Type_Acc := null;
Bit_Type : Type_Acc := null;
end Synth.Objtypes;
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