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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;
with Areapools;
package body Synth.Values is
function To_Value_Acc is new Ada.Unchecked_Conversion
(System.Address, Value_Acc);
function To_Value_Range_Acc is new Ada.Unchecked_Conversion
(System.Address, Value_Range_Acc);
function To_Value_Array_Acc is new Ada.Unchecked_Conversion
(System.Address, Values.Value_Array_Acc);
function Create_Value_Wire (W : Wire_Id; Rng : Value_Range_Acc)
return Value_Acc
is
subtype Value_Type_Wire is Value_Type (Values.Value_Wire);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Value_Type_Wire);
begin
return To_Value_Acc
(Alloc (Current_Pool,
(Kind => Value_Wire,
W => W,
W_Range => Rng)));
end Create_Value_Wire;
function Create_Value_Net (N : Net; Rng : Value_Range_Acc) return Value_Acc
is
subtype Value_Type_Net is Value_Type (Value_Net);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Value_Type_Net);
begin
return To_Value_Acc
(Alloc (Current_Pool,
Value_Type_Net'(Kind => Value_Net, N => N, N_Range => Rng)));
end Create_Value_Net;
function Create_Value_Lit (Val : Iir_Value_Literal_Acc; Typ : Iir)
return Value_Acc
is
subtype Value_Type_Lit is Value_Type (Value_Lit);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Value_Type_Lit);
begin
return To_Value_Acc
(Alloc (Current_Pool,
(Kind => Value_Lit, Lit => Val, Lit_Type => Typ)));
end Create_Value_Lit;
function Bounds_To_Nbr_Elements (Bounds : Value_Bounds_Array_Acc)
return Iir_Index32
is
Len : Iir_Index32;
begin
Len := 1;
for I in Bounds.D'Range loop
Len := Len * Bounds.D (I).Length;
end loop;
return Len;
end Bounds_To_Nbr_Elements;
procedure Create_Array_Data (Arr : Value_Acc)
is
use System;
use Areapools;
Len : constant Iir_Index32 := Bounds_To_Nbr_Elements (Arr.Bounds);
subtype Data_Type is Values.Value_Array_Type (Len);
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;
Arr.Arr := To_Value_Array_Acc (Res);
end Create_Array_Data;
function Create_Array_Value (Bounds : Value_Bounds_Array_Acc)
return Value_Acc
is
subtype Value_Type_Array is Value_Type (Values.Value_Array);
function Alloc is new Areapools.Alloc_On_Pool_Addr (Value_Type_Array);
Res : Value_Acc;
begin
Res := To_Value_Acc
(Alloc (Current_Pool,
(Kind => Values.Value_Array,
Arr => null, Bounds => Bounds)));
Create_Array_Data (Res);
return Res;
end Create_Array_Value;
function Create_Range_Value (Rng : Value_Range) return Value_Range_Acc
is
function Alloc is new Areapools.Alloc_On_Pool_Addr (Value_Range);
begin
return To_Value_Range_Acc (Alloc (Current_Pool, Rng));
end Create_Range_Value;
function Bounds_To_Range (Val : Iir_Value_Literal_Acc)
return Value_Range_Acc
is
pragma Assert (Val.Kind = Iir_Value_Range);
pragma Assert (Val.Left.Kind = Iir_Value_I64);
pragma Assert (Val.Right.Kind = Iir_Value_I64);
begin
return Create_Range_Value ((Dir => Val.Dir,
Len => Width (Val.Length),
Left => Int32 (Val.Left.I64),
Right => Int32 (Val.Right.I64)));
end Bounds_To_Range;
end Synth.Values;
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