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|
-- Environment definition for 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, see <gnu.org/licenses>.
with Name_Table;
with Errorout; use Errorout;
with Vhdl.Nodes; use Vhdl.Nodes;
with Vhdl.Errors; use Vhdl.Errors;
with Vhdl.Utils;
with Synth.Errors; use Synth.Errors;
with Synth.Vhdl_Context; use Synth.Vhdl_Context;
package body Synth.Vhdl_Environment is
function Get_Bitwidth (Val : Memtyp) return Uns32 is
begin
return Val.Typ.W;
end Get_Bitwidth;
function Memtyp_To_Net (Ctxt : Builders.Context_Acc; Val : Memtyp)
return Net is
begin
return Get_Memtyp_Net (Ctxt, Val);
end Memtyp_To_Net;
function Partial_Memtyp_To_Net
(Ctxt : Builders.Context_Acc; Val : Memtyp; Off : Uns32; Wd : Uns32)
return Net is
begin
return Get_Partial_Memtyp_Net (Ctxt, Val, Off, Wd);
end Partial_Memtyp_To_Net;
procedure Warning_No_Assignment
(Decl : Decl_Type; First_Off : Uns32; Last_Off : Uns32) is
begin
if Last_Off < First_Off then
Warning_Msg_Synth
(+Decl.Obj, "no assignment for %n", +Decl.Obj);
elsif Last_Off = First_Off then
Warning_Msg_Synth (+Decl.Obj, "no assignment for offset %v of %n",
(1 => +First_Off, 2 => +Decl.Obj));
else
Warning_Msg_Synth (+Decl.Obj, "no assignment for offsets %v:%v of %n",
(+First_Off, +Last_Off, +Decl.Obj));
end if;
end Warning_No_Assignment;
function Info_Subrange_Vhdl (Off : Width; Wd : Width; Bnd: Bound_Type)
return String
is
function Image (V : Int32) return String
is
Res : constant String := Int32'Image (V);
begin
if V >= 0 then
return Res (2 .. Res'Last);
else
return Res;
end if;
end Image;
begin
case Bnd.Dir is
when Dir_To =>
if Wd = 1 then
return Image (Bnd.Right - Int32 (Off));
else
return Image (Bnd.Left + Int32 (Bnd.Len - (Off + Wd)))
& " to "
& Image (Bnd.Right - Int32 (Off));
end if;
when Dir_Downto =>
if Wd = 1 then
return Image (Bnd.Right + Int32 (Off));
else
return Image (Bnd.Left - Int32 (Bnd.Len - (Off + Wd)))
& " downto "
& Image (Bnd.Right + Int32 (Off));
end if;
end case;
end Info_Subrange_Vhdl;
procedure Info_Subnet_Vhdl (Loc : Location_Type;
Prefix : String;
Otype : Vhdl.Nodes.Node;
Typ : Type_Acc;
Off : Width;
Wd : Width) is
begin
case Typ.Kind is
when Type_Bit
| Type_Logic
| Type_Discrete
| Type_Float =>
pragma Assert (Wd = Typ.W);
pragma Assert (Off = 0);
Info_Msg_Synth (+Loc, " " & Prefix);
when Type_File
| Type_Protected
| Type_Access
| Type_Unbounded_Array
| Type_Unbounded_Record
| Type_Unbounded_Vector =>
raise Internal_Error;
when Type_Vector =>
pragma Assert (Wd <= Typ.W);
if Off = 0 and Wd = Typ.W then
Info_Msg_Synth (+Loc, " " & Prefix);
else
Info_Msg_Synth
(+Loc,
" " & Prefix
& "(" & Info_Subrange_Vhdl (Off, Wd, Typ.Abound) & ")");
end if;
when Type_Slice
| Type_Array =>
Info_Msg_Synth (+Loc, " " & Prefix & "(??)");
when Type_Record =>
declare
Els : constant Iir_Flist :=
Get_Elements_Declaration_List (Otype);
begin
for I in Typ.Rec.E'Range loop
declare
El : Rec_El_Type renames Typ.Rec.E (I);
Field : constant Vhdl.Nodes.Node :=
Get_Nth_Element (Els, Natural (I - 1));
Sub_Off : Uns32;
Sub_Wd : Width;
begin
if Off + Wd <= El.Offs.Net_Off then
-- Not covered anymore.
exit;
elsif Off >= El.Offs.Net_Off + El.Typ.W then
-- Not yet covered.
null;
elsif Off <= El.Offs.Net_Off
and then Off + Wd >= El.Offs.Net_Off + El.Typ.W
then
-- Fully covered.
Info_Msg_Synth
(+Loc,
" " & Prefix & '.'
& Vhdl.Utils.Image_Identifier (Field));
else
-- Partially covered.
if Off < El.Offs.Net_Off then
Sub_Off := 0;
Sub_Wd := Wd - (El.Offs.Net_Off - Off);
Sub_Wd := Width'Min (Sub_Wd, El.Typ.W);
else
Sub_Off := Off - El.Offs.Net_Off;
Sub_Wd := El.Typ.W - (Off - El.Offs.Net_Off);
Sub_Wd := Width'Min (Sub_Wd, Wd);
end if;
Info_Subnet_Vhdl
(+Loc,
Prefix & '.' & Vhdl.Utils.Image_Identifier (Field),
Get_Type (Field), El.Typ, Sub_Off, Sub_Wd);
end if;
end;
end loop;
end;
end case;
end Info_Subnet_Vhdl;
procedure Info_Subnet
(Decl : Vhdl.Nodes.Node; Typ : Type_Acc; Off : Width; Wd : Width)
is
Loc : Location_Type;
begin
if Typ = null then
-- Type is unknown, cannot display more infos.
return;
end if;
if Off = 0 and Wd = Typ.W then
-- Whole object, no need to give details.
-- TODO: just say it ?
return;
end if;
Loc := Vhdl.Nodes.Get_Location (Decl);
Info_Msg_Synth (+Loc, " this concerns these parts of the signal:");
Info_Subnet_Vhdl (Loc,
Name_Table.Image (Vhdl.Nodes.Get_Identifier (Decl)),
Vhdl.Nodes.Get_Type (Decl),
Typ, Off, Wd);
end Info_Subnet;
procedure Error_Multiple_Assignments
(Decl : Decl_Type; First_Off : Uns32; Last_Off : Uns32) is
begin
Error_Msg_Synth (+Decl.Obj, "multiple assignments for %i offsets %v:%v",
(+Decl.Obj, +First_Off, +Last_Off));
Info_Subnet (Decl.Obj, Decl.Typ, First_Off, Last_Off + 1 - First_Off);
end Error_Multiple_Assignments;
end Synth.Vhdl_Environment;
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