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|
-- Operations synthesis.
-- Copyright (C) 2019 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 Types; use Types;
with Types_Utils; use Types_Utils;
with Mutils; use Mutils;
with Vhdl.Ieee.Std_Logic_1164; use Vhdl.Ieee.Std_Logic_1164;
with Vhdl.Std_Package;
with Vhdl.Errors; use Vhdl.Errors;
with Vhdl.Utils; use Vhdl.Utils;
with Areapools;
with Vhdl.Annotations; use Vhdl.Annotations;
with Netlists; use Netlists;
with Netlists.Gates; use Netlists.Gates;
with Netlists.Builders; use Netlists.Builders;
with Synth.Errors; use Synth.Errors;
with Synth.Types; use Synth.Types;
with Synth.Stmts; use Synth.Stmts;
with Synth.Expr; use Synth.Expr;
package body Synth.Oper is
-- As log2(3m) is directly referenced, the program must be linked with -lm
-- (math library) on unix systems.
pragma Linker_Options ("-lm");
function Synth_Uresize (N : Net; W : Width; Loc : Node) return Net
is
Wn : constant Width := Get_Width (N);
Res : Net;
begin
if Wn = W then
return N;
else
if Wn > W then
Res := Build_Trunc (Build_Context, Id_Utrunc, N, W);
else
pragma Assert (Wn < W);
Res := Build_Extend (Build_Context, Id_Uextend, N, W);
end if;
Set_Location (Res, Loc);
return Res;
end if;
end Synth_Uresize;
function Synth_Sresize (N : Net; W : Width; Loc : Node) return Net
is
Wn : constant Width := Get_Width (N);
Res : Net;
begin
if Wn = W then
return N;
else
if Wn > W then
Res := Build_Trunc (Build_Context, Id_Strunc, N, W);
else
pragma Assert (Wn < W);
Res := Build_Extend (Build_Context, Id_Sextend, N, W);
end if;
Set_Location (Res, Loc);
return Res;
end if;
end Synth_Sresize;
function Synth_Uresize (Val : Value_Acc; W : Width; Loc : Node) return Net
is
Res : Net;
begin
if Is_Const (Val) and then Val.Typ.Kind = Type_Discrete then
if Val.Typ.Drange.Is_Signed then
-- TODO.
raise Internal_Error;
else
Res := Build2_Const_Uns (Build_Context, To_Uns64 (Val.Scal), W);
end if;
Set_Location (Res, Loc);
return Res;
end if;
return Synth_Uresize (Get_Net (Val), W, Loc);
end Synth_Uresize;
function Synth_Bit_Eq_Const (Cst : Value_Acc; Expr : Value_Acc; Loc : Node)
return Value_Acc
is
Val : Uns32;
Zx : Uns32;
N : Net;
begin
if Is_Const (Expr) then
return Create_Value_Discrete (Boolean'Pos (Cst.Scal = Expr.Scal),
Boolean_Type);
end if;
To_Logic (Cst.Scal, Cst.Typ, Val, Zx);
if Zx /= 0 then
-- Equal unknown -> return X
N := Build_Const_UL32 (Build_Context, 0, 1, 1);
Set_Location (N, Loc);
return Create_Value_Net (N, Boolean_Type);
elsif Val = 1 then
return Expr;
else
pragma Assert (Val = 0);
N := Build_Monadic (Build_Context, Id_Not, Get_Net (Expr));
Set_Location (N, Loc);
return Create_Value_Net (N, Boolean_Type);
end if;
end Synth_Bit_Eq_Const;
-- Create the result range of an operator. According to the ieee standard,
-- the range is LEN-1 downto 0.
function Create_Res_Bound (Prev : Value_Acc; N : Net) return Type_Acc
is
Res : Type_Acc;
Wd : Width;
begin
Res := Prev.Typ;
if Res.Vbound.Dir = Iir_Downto
and then Res.Vbound.Right = 0
then
-- Normalized range
return Res;
end if;
Wd := Get_Width (N);
return Create_Vec_Type_By_Length (Wd, Res.Vec_El);
end Create_Res_Bound;
function Create_Bounds_From_Length
(Syn_Inst : Synth_Instance_Acc; Atype : Iir; Len : Iir_Index32)
return Bound_Type
is
Res : Bound_Type;
Index_Bounds : Discrete_Range_Type;
W : Width;
begin
Synth_Discrete_Range (Syn_Inst, Atype, Index_Bounds, W);
Res := (Left => Int32 (Index_Bounds.Left),
Right => 0,
Dir => Index_Bounds.Dir,
Wbounds => W,
Wlen => Width (Clog2 (Uns64 (Len))),
Len => Uns32 (Len));
if Len = 0 then
-- Special case.
Res.Right := Res.Left;
case Index_Bounds.Dir is
when Iir_To =>
Res.Left := Res.Right + 1;
when Iir_Downto =>
Res.Left := Res.Right - 1;
end case;
else
case Index_Bounds.Dir is
when Iir_To =>
Res.Right := Res.Left + Int32 (Len - 1);
when Iir_Downto =>
Res.Right := Res.Left - Int32 (Len - 1);
end case;
end if;
return Res;
end Create_Bounds_From_Length;
function Synth_Dyadic_Operation (Syn_Inst : Synth_Instance_Acc;
Imp : Node;
Left_Expr : Node;
Right_Expr : Node;
Expr : Node) return Value_Acc
is
Def : constant Iir_Predefined_Functions :=
Get_Implicit_Definition (Imp);
Inter_Chain : constant Node :=
Get_Interface_Declaration_Chain (Imp);
Expr_Type : constant Node := Get_Type (Expr);
Left_Type : constant Node := Get_Type (Inter_Chain);
Right_Type : constant Node := Get_Type (Get_Chain (Inter_Chain));
Left : Value_Acc;
Right : Value_Acc;
function Synth_Bit_Dyadic (Id : Dyadic_Module_Id) return Value_Acc
is
N : Net;
begin
N := Build_Dyadic (Build_Context, Id,
Get_Net (Left), Get_Net (Right));
Set_Location (N, Expr);
return Create_Value_Net (N, Left.Typ);
end Synth_Bit_Dyadic;
function Synth_Compare (Id : Compare_Module_Id) return Value_Acc
is
N : Net;
L, R : Value_Acc;
Typ : Type_Acc;
begin
pragma Assert (Left_Type = Right_Type);
Typ := Get_Value_Type (Syn_Inst, Left_Type);
L := Synth_Subtype_Conversion (Left, Typ, Expr);
R := Synth_Subtype_Conversion (Right, Typ, Expr);
N := Build_Compare (Build_Context, Id, Get_Net (L), Get_Net (R));
Set_Location (N, Expr);
return Create_Value_Net (N, Boolean_Type);
end Synth_Compare;
function Synth_Compare_Uns_Nat (Id : Compare_Module_Id)
return Value_Acc
is
N : Net;
begin
N := Synth_Uresize (Right, Get_Width (Left), Expr);
N := Build_Compare (Build_Context, Id, Get_Net (Left), N);
Set_Location (N, Expr);
return Create_Value_Net (N, Boolean_Type);
end Synth_Compare_Uns_Nat;
function Synth_Vec_Dyadic (Id : Dyadic_Module_Id) return Value_Acc
is
L : constant Net := Get_Net (Left);
N : Net;
begin
N := Build_Dyadic (Build_Context, Id, L, Get_Net (Right));
Set_Location (N, Expr);
return Create_Value_Net (N, Create_Res_Bound (Left, L));
end Synth_Vec_Dyadic;
function Synth_Int_Dyadic (Id : Dyadic_Module_Id) return Value_Acc
is
Etype : constant Type_Acc := Get_Value_Type (Syn_Inst, Expr_Type);
N : Net;
begin
N := Build_Dyadic
(Build_Context, Id, Get_Net (Left), Get_Net (Right));
Set_Location (N, Expr);
return Create_Value_Net (N, Etype);
end Synth_Int_Dyadic;
function Synth_Dyadic_Uns (Id : Dyadic_Module_Id; Is_Res_Vec : Boolean)
return Value_Acc
is
L : constant Net := Get_Net (Left);
R : constant Net := Get_Net (Right);
W : constant Width := Width'Max (Get_Width (L), Get_Width (R));
Rtype : Type_Acc;
L1, R1 : Net;
N : Net;
begin
if Is_Res_Vec then
Rtype := Create_Vec_Type_By_Length (W, Left.Typ.Vec_El);
else
Rtype := Left.Typ;
end if;
L1 := Synth_Uresize (L, W, Expr);
R1 := Synth_Uresize (R, W, Expr);
N := Build_Dyadic (Build_Context, Id, L1, R1);
Set_Location (N, Expr);
return Create_Value_Net (N, Rtype);
end Synth_Dyadic_Uns;
function Synth_Dyadic_Sgn (Id : Dyadic_Module_Id; Is_Res_Vec : Boolean)
return Value_Acc
is
L : constant Net := Get_Net (Left);
R : constant Net := Get_Net (Right);
W : constant Width := Width'Max (Get_Width (L), Get_Width (R));
Rtype : Type_Acc;
L1, R1 : Net;
N : Net;
begin
if Is_Res_Vec then
Rtype := Create_Vec_Type_By_Length (W, Left.Typ.Vec_El);
else
Rtype := Left.Typ;
end if;
L1 := Synth_Sresize (L, W, Expr);
R1 := Synth_Sresize (R, W, Expr);
N := Build_Dyadic (Build_Context, Id, L1, R1);
Set_Location (N, Expr);
return Create_Value_Net (N, Rtype);
end Synth_Dyadic_Sgn;
function Synth_Compare_Uns_Uns (Id : Compare_Module_Id)
return Value_Acc
is
L : constant Net := Get_Net (Left);
R : constant Net := Get_Net (Right);
W : constant Width := Width'Max (Get_Width (L), Get_Width (R));
L1, R1 : Net;
N : Net;
begin
L1 := Synth_Uresize (L, W, Expr);
R1 := Synth_Uresize (R, W, Expr);
N := Build_Compare (Build_Context, Id, L1, R1);
Set_Location (N, Expr);
return Create_Value_Net (N, Boolean_Type);
end Synth_Compare_Uns_Uns;
function Synth_Dyadic_Uns_Nat (Id : Dyadic_Module_Id) return Value_Acc
is
L : constant Net := Get_Net (Left);
R1 : Net;
N : Net;
begin
R1 := Synth_Uresize (Right, Get_Width (Left), Expr);
N := Build_Dyadic (Build_Context, Id, L, R1);
Set_Location (N, Expr);
return Create_Value_Net (N, Create_Res_Bound (Left, L));
end Synth_Dyadic_Uns_Nat;
function Synth_Compare_Sgn_Sgn (Id : Compare_Module_Id)
return Value_Acc
is
L : constant Net := Get_Net (Left);
R : constant Net := Get_Net (Right);
W : constant Width := Width'Max (Get_Width (L), Get_Width (R));
L1, R1 : Net;
N : Net;
begin
L1 := Synth_Sresize (L, W, Expr);
R1 := Synth_Sresize (R, W, Expr);
N := Build_Compare (Build_Context, Id, L1, R1);
Set_Location (N, Expr);
return Create_Value_Net (N, Boolean_Type);
end Synth_Compare_Sgn_Sgn;
begin
Left := Synth_Expression_With_Type (Syn_Inst, Left_Expr, Left_Type);
Right := Synth_Expression_With_Type (Syn_Inst, Right_Expr, Right_Type);
case Def is
when Iir_Predefined_Error =>
return null;
when Iir_Predefined_Bit_And
| Iir_Predefined_Boolean_And
| Iir_Predefined_Ieee_1164_Scalar_And =>
return Synth_Bit_Dyadic (Id_And);
when Iir_Predefined_Bit_Xor
| Iir_Predefined_Ieee_1164_Scalar_Xor =>
return Synth_Bit_Dyadic (Id_Xor);
when Iir_Predefined_Bit_Or
| Iir_Predefined_Boolean_Or
| Iir_Predefined_Ieee_1164_Scalar_Or =>
return Synth_Bit_Dyadic (Id_Or);
when Iir_Predefined_Bit_Nor
| Iir_Predefined_Ieee_1164_Scalar_Nor =>
return Synth_Bit_Dyadic (Id_Nor);
when Iir_Predefined_Bit_Nand
| Iir_Predefined_Ieee_1164_Scalar_Nand =>
return Synth_Bit_Dyadic (Id_Nand);
when Iir_Predefined_Bit_Xnor
| Iir_Predefined_Ieee_1164_Scalar_Xnor =>
return Synth_Bit_Dyadic (Id_Xnor);
when Iir_Predefined_Ieee_1164_Vector_And
| Iir_Predefined_Ieee_Numeric_Std_And_Uns_Uns
| Iir_Predefined_Ieee_Numeric_Std_And_Sgn_Sgn =>
return Synth_Vec_Dyadic (Id_And);
when Iir_Predefined_Ieee_1164_Vector_Or
| Iir_Predefined_Ieee_Numeric_Std_Or_Uns_Uns
| Iir_Predefined_Ieee_Numeric_Std_Or_Sgn_Sgn =>
return Synth_Vec_Dyadic (Id_Or);
when Iir_Predefined_Ieee_1164_Vector_Nand
| Iir_Predefined_Ieee_Numeric_Std_Nand_Uns_Uns
| Iir_Predefined_Ieee_Numeric_Std_Nand_Sgn_Sgn =>
return Synth_Vec_Dyadic (Id_Nand);
when Iir_Predefined_Ieee_1164_Vector_Nor
| Iir_Predefined_Ieee_Numeric_Std_Nor_Uns_Uns
| Iir_Predefined_Ieee_Numeric_Std_Nor_Sgn_Sgn =>
return Synth_Vec_Dyadic (Id_Nor);
when Iir_Predefined_Ieee_1164_Vector_Xor
| Iir_Predefined_Ieee_Numeric_Std_Xor_Uns_Uns
| Iir_Predefined_Ieee_Numeric_Std_Xor_Sgn_Sgn =>
return Synth_Vec_Dyadic (Id_Xor);
when Iir_Predefined_Ieee_1164_Vector_Xnor
| Iir_Predefined_Ieee_Numeric_Std_Xnor_Uns_Uns
| Iir_Predefined_Ieee_Numeric_Std_Xnor_Sgn_Sgn =>
return Synth_Vec_Dyadic (Id_Xnor);
when Iir_Predefined_Enum_Equality =>
if Is_Bit_Type (Left_Type) then
pragma Assert (Is_Bit_Type (Right_Type));
if Is_Const (Left) then
return Synth_Bit_Eq_Const (Left, Right, Expr);
elsif Is_Const (Right) then
return Synth_Bit_Eq_Const (Right, Left, Expr);
end if;
end if;
return Synth_Compare (Id_Eq);
when Iir_Predefined_Enum_Inequality =>
-- TODO: Optimize ?
return Synth_Compare (Id_Ne);
when Iir_Predefined_Enum_Less_Equal =>
return Synth_Compare (Id_Ult);
when Iir_Predefined_Array_Equality =>
-- TODO: check size, handle non-vector.
if Is_Vector_Type (Left_Type) then
return Synth_Compare (Id_Eq);
else
raise Internal_Error;
end if;
when Iir_Predefined_Array_Inequality =>
-- TODO: check size, handle non-vector.
if Is_Vector_Type (Left_Type) then
return Synth_Compare (Id_Ne);
else
raise Internal_Error;
end if;
when Iir_Predefined_Array_Greater =>
-- TODO: check size, non-vector.
-- TODO: that's certainly not the correct operator.
if Is_Vector_Type (Left_Type) then
return Synth_Compare (Id_Ugt);
else
raise Internal_Error;
end if;
when Iir_Predefined_Ieee_Numeric_Std_Add_Uns_Nat =>
-- "+" (Unsigned, Natural)
return Synth_Dyadic_Uns_Nat (Id_Add);
when Iir_Predefined_Ieee_Numeric_Std_Add_Uns_Uns
| Iir_Predefined_Ieee_Numeric_Std_Add_Uns_Log
| Iir_Predefined_Ieee_Std_Logic_Unsigned_Add_Slv_Sl =>
-- "+" (Unsigned, Unsigned)
return Synth_Dyadic_Uns (Id_Add, True);
when Iir_Predefined_Ieee_Numeric_Std_Add_Sgn_Sgn =>
-- "+" (Signed, Signed)
return Synth_Dyadic_Sgn (Id_Add, True);
when Iir_Predefined_Ieee_Numeric_Std_Sub_Uns_Nat =>
-- "-" (Unsigned, Natural)
return Synth_Dyadic_Uns_Nat (Id_Sub);
when Iir_Predefined_Ieee_Numeric_Std_Sub_Uns_Uns =>
-- "-" (Unsigned, Unsigned)
return Synth_Dyadic_Uns (Id_Sub, True);
when Iir_Predefined_Ieee_Numeric_Std_Mul_Sgn_Sgn =>
declare
L : constant Net := Get_Net (Left);
R : constant Net := Get_Net (Right);
W : constant Width := Get_Width (L) + Get_Width (R);
Rtype : Type_Acc;
N : Net;
begin
Rtype := Create_Vec_Type_By_Length (W, Left.Typ.Vec_El);
N := Build_Dyadic (Build_Context, Id_Smul, L, R);
Set_Location (N, Expr);
return Create_Value_Net (N, Rtype);
end;
when Iir_Predefined_Ieee_Numeric_Std_Eq_Uns_Nat =>
-- "=" (Unsigned, Natural)
return Synth_Compare_Uns_Nat (Id_Eq);
when Iir_Predefined_Ieee_Numeric_Std_Eq_Uns_Uns
| Iir_Predefined_Ieee_Std_Logic_Unsigned_Eq_Slv_Slv =>
-- "=" (Unsigned, Unsigned) [resize]
return Synth_Compare_Uns_Uns (Id_Eq);
when Iir_Predefined_Ieee_Numeric_Std_Ne_Uns_Uns
| Iir_Predefined_Ieee_Std_Logic_Unsigned_Ne_Slv_Slv =>
-- "/=" (Unsigned, Unsigned) [resize]
return Synth_Compare_Uns_Uns (Id_Ne);
when Iir_Predefined_Ieee_Numeric_Std_Ne_Uns_Nat =>
-- "/=" (Unsigned, Natural)
return Synth_Compare_Uns_Nat (Id_Ne);
when Iir_Predefined_Ieee_Numeric_Std_Lt_Uns_Nat =>
-- "<" (Unsigned, Natural)
if Is_Const (Right) and then Right.Scal = 0 then
-- Always false.
return Create_Value_Discrete (0, Boolean_Type);
end if;
return Synth_Compare_Uns_Nat (Id_Ult);
when Iir_Predefined_Ieee_Numeric_Std_Lt_Uns_Uns
| Iir_Predefined_Ieee_Std_Logic_Unsigned_Lt_Slv_Slv =>
-- "<" (Unsigned, Unsigned) [resize]
return Synth_Compare_Uns_Uns (Id_Ult);
when Iir_Predefined_Ieee_Numeric_Std_Lt_Sgn_Sgn =>
-- "<" (Signed, Signed) [resize]
return Synth_Compare_Sgn_Sgn (Id_Slt);
when Iir_Predefined_Ieee_Numeric_Std_Le_Uns_Uns
| Iir_Predefined_Ieee_Std_Logic_Unsigned_Le_Slv_Slv =>
-- "<=" (Unsigned, Unsigned) [resize]
return Synth_Compare_Uns_Uns (Id_Ule);
when Iir_Predefined_Ieee_Numeric_Std_Gt_Uns_Nat =>
-- ">" (Unsigned, Natural)
return Synth_Compare_Uns_Nat (Id_Ugt);
when Iir_Predefined_Ieee_Numeric_Std_Gt_Uns_Uns
| Iir_Predefined_Ieee_Std_Logic_Unsigned_Gt_Slv_Slv =>
-- ">" (Unsigned, Unsigned) [resize]
return Synth_Compare_Uns_Uns (Id_Ugt);
when Iir_Predefined_Ieee_Numeric_Std_Gt_Sgn_Sgn =>
-- ">" (Signed, Signed) [resize]
return Synth_Compare_Sgn_Sgn (Id_Sgt);
when Iir_Predefined_Ieee_Numeric_Std_Ge_Uns_Uns
| Iir_Predefined_Ieee_Std_Logic_Unsigned_Ge_Slv_Slv =>
-- ">=" (Unsigned, Unsigned) [resize]
return Synth_Compare_Uns_Uns (Id_Uge);
when Iir_Predefined_Array_Element_Concat =>
declare
L : constant Net := Get_Net (Left);
Bnd : Bound_Type;
N : Net;
begin
N := Build_Concat2 (Build_Context, L, Get_Net (Right));
Set_Location (N, Expr);
Bnd := Create_Bounds_From_Length
(Syn_Inst,
Get_Index_Type (Get_Type (Expr), 0),
Iir_Index32 (Get_Width (L) + 1));
return Create_Value_Net
(N, Create_Vector_Type (Bnd, Right.Typ));
end;
when Iir_Predefined_Element_Array_Concat =>
declare
R : constant Net := Get_Net (Right);
Bnd : Bound_Type;
N : Net;
begin
N := Build_Concat2 (Build_Context, Get_Net (Left), R);
Set_Location (N, Expr);
Bnd := Create_Bounds_From_Length
(Syn_Inst,
Get_Index_Type (Get_Type (Expr), 0),
Iir_Index32 (Get_Width (R) + 1));
return Create_Value_Net
(N, Create_Vector_Type (Bnd, Left.Typ));
end;
when Iir_Predefined_Element_Element_Concat =>
declare
N : Net;
Bnd : Bound_Type;
begin
N := Build_Concat2
(Build_Context, Get_Net (Left), Get_Net (Right));
Set_Location (N, Expr);
Bnd := Create_Bounds_From_Length
(Syn_Inst, Get_Index_Type (Get_Type (Expr), 0), 2);
return Create_Value_Net
(N, Create_Vector_Type (Bnd, Left.Typ));
end;
when Iir_Predefined_Array_Array_Concat =>
declare
L : constant Net := Get_Net (Left);
R : constant Net := Get_Net (Right);
Bnd : Bound_Type;
N : Net;
begin
N := Build_Concat2 (Build_Context, L, R);
Set_Location (N, Expr);
Bnd := Create_Bounds_From_Length
(Syn_Inst,
Get_Index_Type (Get_Type (Expr), 0),
Iir_Index32 (Get_Width (L) + Get_Width (R)));
return Create_Value_Net
(N, Create_Vector_Type (Bnd, Left.Typ.Vec_El));
end;
when Iir_Predefined_Integer_Plus =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Left.Scal + Right.Scal,
Get_Value_Type (Syn_Inst, Get_Type (Expr)));
else
return Synth_Int_Dyadic (Id_Add);
end if;
when Iir_Predefined_Integer_Minus =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Left.Scal - Right.Scal,
Get_Value_Type (Syn_Inst, Get_Type (Expr)));
else
return Synth_Int_Dyadic (Id_Sub);
end if;
when Iir_Predefined_Integer_Mul =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Left.Scal * Right.Scal,
Get_Value_Type (Syn_Inst, Get_Type (Expr)));
else
return Synth_Int_Dyadic (Id_Smul);
end if;
when Iir_Predefined_Integer_Div =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Left.Scal / Right.Scal,
Get_Value_Type (Syn_Inst, Get_Type (Expr)));
else
Error_Msg_Synth (+Expr, "non-constant division not supported");
return null;
end if;
when Iir_Predefined_Integer_Mod =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Left.Scal mod Right.Scal,
Get_Value_Type (Syn_Inst, Get_Type (Expr)));
else
Error_Msg_Synth (+Expr, "non-constant mod not supported");
return null;
end if;
when Iir_Predefined_Integer_Rem =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Left.Scal rem Right.Scal,
Get_Value_Type (Syn_Inst, Get_Type (Expr)));
else
Error_Msg_Synth (+Expr, "non-constant rem not supported");
return null;
end if;
when Iir_Predefined_Integer_Exp =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Left.Scal ** Natural (Right.Scal),
Get_Value_Type (Syn_Inst, Get_Type (Expr)));
else
Error_Msg_Synth
(+Expr, "non-constant exponentiation not supported");
return null;
end if;
when Iir_Predefined_Integer_Less_Equal =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Boolean'Pos (Left.Scal <= Right.Scal), Boolean_Type);
else
return Synth_Compare (Id_Sle);
end if;
when Iir_Predefined_Integer_Less =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Boolean'Pos (Left.Scal < Right.Scal), Boolean_Type);
else
return Synth_Compare (Id_Slt);
end if;
when Iir_Predefined_Integer_Greater_Equal =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Boolean'Pos (Left.Scal >= Right.Scal), Boolean_Type);
else
return Synth_Compare (Id_Sge);
end if;
when Iir_Predefined_Integer_Greater =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Boolean'Pos (Left.Scal > Right.Scal), Boolean_Type);
else
return Synth_Compare (Id_Sgt);
end if;
when Iir_Predefined_Integer_Equality =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Boolean'Pos (Left.Scal = Right.Scal), Boolean_Type);
else
return Synth_Compare (Id_Eq);
end if;
when Iir_Predefined_Integer_Inequality =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Boolean'Pos (Left.Scal /= Right.Scal), Boolean_Type);
else
return Synth_Compare (Id_Ne);
end if;
when Iir_Predefined_Physical_Physical_Div =>
if Is_Const (Left) and then Is_Const (Right) then
return Create_Value_Discrete
(Left.Scal / Right.Scal,
Get_Value_Type (Syn_Inst, Get_Type (Expr)));
else
Error_Msg_Synth (+Expr, "non-constant division not supported");
return null;
end if;
when others =>
Error_Msg_Synth (+Expr, "synth_dyadic_operation: unhandled "
& Iir_Predefined_Functions'Image (Def));
raise Internal_Error;
end case;
end Synth_Dyadic_Operation;
function Synth_Monadic_Operation (Syn_Inst : Synth_Instance_Acc;
Def : Iir_Predefined_Functions;
Operand_Expr : Node;
Loc : Node) return Value_Acc
is
Operand : Value_Acc;
function Synth_Bit_Monadic (Id : Monadic_Module_Id) return Value_Acc
is
N : Net;
begin
N := Build_Monadic (Build_Context, Id, Get_Net (Operand));
Set_Location (N, Loc);
return Create_Value_Net (N, Operand.Typ);
end Synth_Bit_Monadic;
function Synth_Vec_Monadic (Id : Monadic_Module_Id) return Value_Acc
is
Op: constant Net := Get_Net (Operand);
N : Net;
begin
N := Build_Monadic (Build_Context, Id, Op);
Set_Location (N, Loc);
return Create_Value_Net (N, Create_Res_Bound (Operand, Op));
end Synth_Vec_Monadic;
function Synth_Vec_Reduce_Monadic (Id : Reduce_Module_Id)
return Value_Acc
is
Op: constant Net := Get_Net (Operand);
N : Net;
begin
N := Build_Reduce (Build_Context, Id, Op);
Set_Location (N, Loc);
return Create_Value_Net (N, Operand.Typ.Vec_El);
end Synth_Vec_Reduce_Monadic;
begin
Operand := Synth_Expression (Syn_Inst, Operand_Expr);
case Def is
when Iir_Predefined_Error =>
return null;
when Iir_Predefined_Ieee_1164_Scalar_Not =>
return Synth_Bit_Monadic (Id_Not);
when Iir_Predefined_Ieee_1164_Vector_Not
| Iir_Predefined_Ieee_Numeric_Std_Not_Uns
| Iir_Predefined_Ieee_Numeric_Std_Not_Sgn =>
return Synth_Vec_Monadic (Id_Not);
when Iir_Predefined_Ieee_Numeric_Std_Neg_Uns
| Iir_Predefined_Ieee_Numeric_Std_Neg_Sgn =>
return Synth_Vec_Monadic (Id_Neg);
when Iir_Predefined_Ieee_1164_Vector_And_Reduce =>
return Synth_Vec_Reduce_Monadic(Id_Red_And);
when Iir_Predefined_Ieee_1164_Vector_Or_Reduce =>
return Synth_Vec_Reduce_Monadic(Id_Red_Or);
when Iir_Predefined_Ieee_1164_Condition_Operator =>
return Operand;
when others =>
Error_Msg_Synth
(+Loc,
"unhandled monadic: " & Iir_Predefined_Functions'Image (Def));
raise Internal_Error;
end case;
end Synth_Monadic_Operation;
function Synth_Shift (Id : Shift_Module_Id;
Left, Right : Value_Acc;
Expr : Node) return Value_Acc
is
L : constant Net := Get_Net (Left);
N : Net;
begin
N := Build_Shift (Build_Context, Id, L, Get_Net (Right));
Set_Location (N, Expr);
return Create_Value_Net (N, Create_Res_Bound (Left, L));
end Synth_Shift;
function Eval_To_Unsigned (Arg : Int64; Sz : Int64; Res_Type : Type_Acc)
return Value_Acc
is
Len : constant Iir_Index32 := Iir_Index32 (Sz);
El_Type : constant Type_Acc := Get_Array_Element (Res_Type);
Arr : Value_Array_Acc;
Bnd : Type_Acc;
begin
Arr := Create_Value_Array (Len);
for I in 1 .. Len loop
Arr.V (Len - I + 1) := Create_Value_Discrete
(Std_Logic_0_Pos + (Arg / 2 ** Natural (I - 1)) mod 2, El_Type);
end loop;
Bnd := Create_Vec_Type_By_Length (Width (Len), El_Type);
return Create_Value_Const_Array (Bnd, Arr);
end Eval_To_Unsigned;
function Synth_Predefined_Function_Call
(Syn_Inst : Synth_Instance_Acc; Expr : Node) return Value_Acc
is
Imp : constant Node := Get_Implementation (Expr);
Def : constant Iir_Predefined_Functions :=
Get_Implicit_Definition (Imp);
Assoc_Chain : constant Node := Get_Parameter_Association_Chain (Expr);
Inter_Chain : constant Node := Get_Interface_Declaration_Chain (Imp);
Subprg_Inst : Synth_Instance_Acc;
M : Areapools.Mark_Type;
begin
Areapools.Mark (M, Instance_Pool.all);
Subprg_Inst := Make_Instance (Syn_Inst, Get_Info (Imp));
Synth_Subprogram_Association
(Subprg_Inst, Syn_Inst, Inter_Chain, Assoc_Chain);
case Def is
when Iir_Predefined_Ieee_Numeric_Std_Touns_Nat_Nat_Uns =>
declare
Arg : constant Value_Acc := Subprg_Inst.Objects (1);
Size : constant Value_Acc := Subprg_Inst.Objects (2);
Arg_Net : Net;
begin
if not Is_Const (Size) then
Error_Msg_Synth (+Expr, "to_unsigned size must be constant");
return Arg;
else
-- FIXME: what if the arg is constant too ?
if Is_Const (Arg) then
return Eval_To_Unsigned
(Arg.Scal, Size.Scal,
Get_Value_Type (Syn_Inst, Get_Type (Imp)));
else
Arg_Net := Get_Net (Arg);
return Create_Value_Net
(Synth_Uresize (Arg_Net, Uns32 (Size.Scal), Expr),
Create_Res_Bound (Arg, Arg_Net));
end if;
end if;
end;
when Iir_Predefined_Ieee_Numeric_Std_Toint_Uns_Nat =>
-- UNSIGNED to Natural.
declare
Int_Type : constant Type_Acc :=
Get_Value_Type (Syn_Inst,
Vhdl.Std_Package.Integer_Subtype_Definition);
begin
return Create_Value_Net
(Synth_Uresize (Get_Net (Subprg_Inst.Objects (1)),
Int_Type.W, Expr),
Int_Type);
end;
when Iir_Predefined_Ieee_Numeric_Std_Resize_Uns_Nat =>
declare
V : constant Value_Acc := Subprg_Inst.Objects (1);
Sz : constant Value_Acc := Subprg_Inst.Objects (2);
W : Width;
begin
if not Is_Const (Sz) then
Error_Msg_Synth (+Expr, "size must be constant");
return null;
end if;
W := Uns32 (Sz.Scal);
return Create_Value_Net
(Synth_Uresize (Get_Net (V), W, Expr),
Create_Vec_Type_By_Length (W, Logic_Type));
end;
when Iir_Predefined_Ieee_Numeric_Std_Resize_Sgn_Nat =>
declare
V : constant Value_Acc := Subprg_Inst.Objects (1);
Sz : constant Value_Acc := Subprg_Inst.Objects (2);
W : Width;
begin
if not Is_Const (Sz) then
Error_Msg_Synth (+Expr, "size must be constant");
return null;
end if;
W := Uns32 (Sz.Scal);
return Create_Value_Net
(Synth_Sresize (Get_Net (V), W, Expr),
Create_Vec_Type_By_Length (W, Logic_Type));
end;
when Iir_Predefined_Ieee_Numeric_Std_Shl_Uns_Nat =>
declare
L : constant Value_Acc := Subprg_Inst.Objects (1);
R : constant Value_Acc := Subprg_Inst.Objects (2);
begin
return Synth_Shift (Id_Lsl, L, R, Expr);
end;
when Iir_Predefined_Ieee_Numeric_Std_Shr_Uns_Nat =>
declare
L : constant Value_Acc := Subprg_Inst.Objects (1);
R : constant Value_Acc := Subprg_Inst.Objects (2);
begin
return Synth_Shift (Id_Lsr, L, R, Expr);
end;
when Iir_Predefined_Ieee_Math_Real_Log2 =>
declare
V : constant Value_Acc := Subprg_Inst.Objects (1);
function Log2 (Arg : Fp64) return Fp64;
pragma Import (C, Log2);
begin
if not Is_Float (V) then
Error_Msg_Synth
(+Expr, "argument must be a float value");
return null;
end if;
return Create_Value_Float
(Log2 (V.Fp), Get_Value_Type (Syn_Inst, Get_Type (Imp)));
end;
when Iir_Predefined_Ieee_Math_Real_Ceil =>
declare
V : constant Value_Acc := Subprg_Inst.Objects (1);
function Ceil (Arg : Fp64) return Fp64;
pragma Import (C, Ceil);
begin
if not Is_Float (V) then
Error_Msg_Synth
(+Expr, "argument must be a float value");
return null;
end if;
return Create_Value_Float
(Ceil (V.Fp), Get_Value_Type (Syn_Inst, Get_Type (Imp)));
end;
when others =>
Error_Msg_Synth
(+Expr,
"unhandled function: " & Iir_Predefined_Functions'Image (Def));
end case;
Free_Instance (Subprg_Inst);
Areapools.Release (M, Instance_Pool.all);
return null;
end Synth_Predefined_Function_Call;
end Synth.Oper;
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