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|
-- Nodes recognizer for ieee.std_logic_unsigned and ieee.std_logic_signed
-- Copyright (C) 2016 Tristan Gingold
--
-- GHDL 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, or (at your option) any later
-- version.
--
-- GHDL 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 GHDL; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Vhdl.Std_Package;
with Std_Names; use Std_Names;
with Vhdl.Ieee.Std_Logic_1164;
package body Vhdl.Ieee.Std_Logic_Unsigned is
type Arg_Kind is (Arg_Slv, Arg_Int, Arg_Log);
type Args_Kind is (Arg_Slv_Slv, Arg_Slv_Int, Arg_Int_Slv,
Arg_Slv_Log, Arg_Log_Slv);
type Binary_Pattern_Type is array (Args_Kind) of Iir_Predefined_Functions;
type Unary_Pattern_Type is array (Sign_Kind) of Iir_Predefined_Functions;
Eq_Uns_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Eq_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Unsigned_Eq_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Eq_Int_Slv,
others => Iir_Predefined_None);
Eq_Sgn_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Eq_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Signed_Eq_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Eq_Int_Slv,
others => Iir_Predefined_None);
Ne_Uns_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Ne_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Unsigned_Ne_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Ne_Int_Slv,
others => Iir_Predefined_None);
Ne_Sgn_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Ne_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Signed_Ne_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Ne_Int_Slv,
others => Iir_Predefined_None);
Lt_Uns_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Lt_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Unsigned_Lt_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Lt_Int_Slv,
others => Iir_Predefined_None);
Lt_Sgn_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Lt_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Signed_Lt_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Lt_Int_Slv,
others => Iir_Predefined_None);
Le_Uns_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Le_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Unsigned_Le_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Le_Int_Slv,
others => Iir_Predefined_None);
Le_Sgn_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Le_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Signed_Le_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Le_Int_Slv,
others => Iir_Predefined_None);
Gt_Uns_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Gt_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Unsigned_Gt_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Gt_Int_Slv,
others => Iir_Predefined_None);
Gt_Sgn_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Gt_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Signed_Gt_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Gt_Int_Slv,
others => Iir_Predefined_None);
Ge_Uns_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Ge_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Unsigned_Ge_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Ge_Int_Slv,
others => Iir_Predefined_None);
Ge_Sgn_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Ge_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Signed_Ge_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Ge_Int_Slv,
others => Iir_Predefined_None);
Add_Uns_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Add_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Unsigned_Add_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Add_Int_Slv,
Arg_Slv_Log => Iir_Predefined_Ieee_Std_Logic_Unsigned_Add_Slv_Log,
Arg_Log_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Add_Log_Slv);
Sub_Uns_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Sub_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Unsigned_Sub_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Sub_Int_Slv,
Arg_Slv_Log => Iir_Predefined_Ieee_Std_Logic_Unsigned_Sub_Slv_Log,
Arg_Log_Slv => Iir_Predefined_Ieee_Std_Logic_Unsigned_Sub_Log_Slv);
Add_Sgn_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Add_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Signed_Add_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Add_Int_Slv,
Arg_Slv_Log => Iir_Predefined_Ieee_Std_Logic_Signed_Add_Slv_Log,
Arg_Log_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Add_Log_Slv);
Sub_Sgn_Patterns : constant Binary_Pattern_Type :=
(Arg_Slv_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Sub_Slv_Slv,
Arg_Slv_Int => Iir_Predefined_Ieee_Std_Logic_Signed_Sub_Slv_Int,
Arg_Int_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Sub_Int_Slv,
Arg_Slv_Log => Iir_Predefined_Ieee_Std_Logic_Signed_Sub_Slv_Log,
Arg_Log_Slv => Iir_Predefined_Ieee_Std_Logic_Signed_Sub_Log_Slv);
Id_Patterns : constant Unary_Pattern_Type :=
(Pkg_Unsigned => Iir_Predefined_Ieee_Std_Logic_Unsigned_Id_Slv,
Pkg_Signed => Iir_Predefined_Ieee_Std_Logic_Signed_Id_Slv);
Conv_Patterns : constant Unary_Pattern_Type :=
(Pkg_Unsigned => Iir_Predefined_Ieee_Std_Logic_Unsigned_Conv_Integer,
Pkg_Signed => Iir_Predefined_Ieee_Std_Logic_Signed_Conv_Integer);
Mul_Patterns : constant Unary_Pattern_Type :=
(Pkg_Unsigned => Iir_Predefined_Ieee_Std_Logic_Unsigned_Mul_Slv_Slv,
Pkg_Signed => Iir_Predefined_Ieee_Std_Logic_Signed_Mul_Slv_Slv);
Shl_Patterns : constant Unary_Pattern_Type :=
(Pkg_Unsigned => Iir_Predefined_Ieee_Std_Logic_Unsigned_Shl,
Pkg_Signed => Iir_Predefined_Ieee_Std_Logic_Signed_Shl);
Shr_Patterns : constant Unary_Pattern_Type :=
(Pkg_Unsigned => Iir_Predefined_Ieee_Std_Logic_Unsigned_Shr,
Pkg_Signed => Iir_Predefined_Ieee_Std_Logic_Signed_Shr);
Error : exception;
procedure Classify_Arg (Arg : Iir; Kind : out Arg_Kind)
is
Arg_Type : constant Iir := Get_Type (Arg);
begin
if Arg_Type = Vhdl.Std_Package.Integer_Subtype_Definition then
Kind := Arg_Int;
elsif Arg_Type = Ieee.Std_Logic_1164.Std_Logic_Type then
Kind := Arg_Log;
elsif Arg_Type = Ieee.Std_Logic_1164.Std_Logic_Vector_Type then
Kind := Arg_Slv;
else
raise Error;
end if;
end Classify_Arg;
procedure Extract_Declaration (Decl : Iir; Sign : Sign_Kind)
is
Arg1, Arg2 : Iir;
Arg1_Kind, Arg2_Kind : Arg_Kind;
function Handle_Binary (Unsigned_Pats : Binary_Pattern_Type;
Signed_Pats : Binary_Pattern_Type)
return Iir_Predefined_Functions
is
Kind : Args_Kind;
begin
case Arg1_Kind is
when Arg_Slv =>
case Arg2_Kind is
when Arg_Slv => Kind := Arg_Slv_Slv;
when Arg_Log => Kind := Arg_Slv_Log;
when Arg_Int => Kind := Arg_Slv_Int;
end case;
when Arg_Int =>
case Arg2_Kind is
when Arg_Slv => Kind := Arg_Int_Slv;
when Arg_Log
| Arg_Int => raise Error;
end case;
when Arg_Log =>
case Arg2_Kind is
when Arg_Slv => Kind := Arg_Log_Slv;
when Arg_Log
| Arg_Int => raise Error;
end case;
end case;
case Sign is
when Pkg_Unsigned =>
return Unsigned_Pats (Kind);
when Pkg_Signed =>
return Signed_Pats (Kind);
end case;
end Handle_Binary;
Res : Iir_Predefined_Functions;
begin
Arg1 := Get_Interface_Declaration_Chain (Decl);
if Is_Null (Arg1) then
raise Error;
end if;
Res := Iir_Predefined_None;
Classify_Arg (Arg1, Arg1_Kind);
Arg2 := Get_Chain (Arg1);
if Is_Valid (Arg2) then
-- Dyadic function.
Classify_Arg (Arg2, Arg2_Kind);
case Get_Identifier (Decl) is
when Name_Op_Equality =>
Res := Handle_Binary (Eq_Uns_Patterns, Eq_Sgn_Patterns);
when Name_Op_Inequality =>
Res := Handle_Binary (Ne_Uns_Patterns, Ne_Sgn_Patterns);
when Name_Op_Less =>
Res := Handle_Binary (Lt_Uns_Patterns, Lt_Sgn_Patterns);
when Name_Op_Less_Equal =>
Res := Handle_Binary (Le_Uns_Patterns, Le_Sgn_Patterns);
when Name_Op_Greater =>
Res := Handle_Binary (Gt_Uns_Patterns, Gt_Sgn_Patterns);
when Name_Op_Greater_Equal =>
Res := Handle_Binary (Ge_Uns_Patterns, Ge_Sgn_Patterns);
when Name_Op_Plus =>
Res := Handle_Binary (Add_Uns_Patterns, Add_Sgn_Patterns);
when Name_Op_Minus =>
Res := Handle_Binary (Sub_Uns_Patterns, Sub_Sgn_Patterns);
when Name_Op_Mul =>
pragma Assert (Arg1_Kind = Arg_Slv);
pragma Assert (Arg2_Kind = Arg_Slv);
Res := Mul_Patterns (Sign);
when Name_Shl =>
pragma Assert (Arg1_Kind = Arg_Slv);
pragma Assert (Arg2_Kind = Arg_Slv);
Res := Shl_Patterns (Sign);
when Name_Shr =>
pragma Assert (Arg1_Kind = Arg_Slv);
pragma Assert (Arg2_Kind = Arg_Slv);
Res := Shr_Patterns (Sign);
when others =>
null;
end case;
else
-- Monadic function.
case Get_Identifier (Decl) is
when Name_Conv_Integer =>
Res := Conv_Patterns (Sign);
when Name_Op_Plus =>
pragma Assert (Arg1_Kind = Arg_Slv);
Res := Id_Patterns (Sign);
when Name_Op_Minus =>
if Sign = Pkg_Signed and Arg1_Kind = Arg_Slv then
Res := Iir_Predefined_Ieee_Std_Logic_Signed_Neg_Slv;
end if;
when Name_Abs =>
if Sign = Pkg_Signed and Arg1_Kind = Arg_Slv then
Res := Iir_Predefined_Ieee_Std_Logic_Signed_Abs_Slv;
end if;
when others =>
null;
end case;
end if;
Set_Implicit_Definition (Decl, Res);
end Extract_Declaration;
procedure Extract_Declarations
(Pkg : Iir_Package_Declaration; Sign : Sign_Kind)
is
Decl : Iir;
begin
Decl := Get_Declaration_Chain (Pkg);
-- Handle functions.
while Is_Valid (Decl) loop
if Get_Kind (Decl) /= Iir_Kind_Function_Declaration then
raise Error;
end if;
Extract_Declaration (Decl, Sign);
Decl := Get_Chain (Decl);
end loop;
end Extract_Declarations;
end Vhdl.Ieee.Std_Logic_Unsigned;
|
