vhdl: recognize some functions of math_real.

5 files changed, 91 insertions, 3 deletions

diff --git a/src/vhdl/vhdl-ieee-math_real.adb b/src/vhdl/vhdl-ieee-math_real.adb
new file mode 100644
index 000000000..d62e4c246
--- /dev/null
+++ b/src/vhdl/vhdl-ieee-math_real.adb
@@ -0,0 +1,58 @@
+--  Nodes recognizer for ieee.math_real.
+--  Copyright (C) 2019 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 Std_Names; use Std_Names;
+
+package body Vhdl.Ieee.Math_Real is
+   procedure Extract_Declarations (Pkg : Iir_Package_Declaration)
+   is
+      Decl : Iir;
+      Predef : Iir_Predefined_Functions;
+   begin
+      Math_Real_Pkg := Pkg;
+
+      Decl := Get_Declaration_Chain (Pkg);
+
+      --  Skip a potential copyright constant.
+      Decl := Skip_Copyright_Notice (Decl);
+
+      --  Skip any declarations but functions.
+      loop
+         Decl := Get_Chain (Decl);
+         exit when Decl = Null_Iir;
+
+         case Get_Kind (Decl) is
+            when Iir_Kind_Function_Declaration =>
+               Predef := Iir_Predefined_None;
+               case Get_Identifier (Decl) is
+                  when Name_Ceil =>
+                     Predef := Iir_Predefined_Ieee_Math_Real_Ceil;
+                  when Name_Log2 =>
+                     Predef := Iir_Predefined_Ieee_Math_Real_Log2;
+                  when others =>
+                     null;
+               end case;
+               Set_Implicit_Definition (Decl, Predef);
+            when Iir_Kind_Constant_Declaration =>
+               null;
+            when others =>
+               null;
+         end case;
+      end loop;
+   end Extract_Declarations;
+end Vhdl.Ieee.Math_Real;
diff --git a/src/vhdl/vhdl-ieee-math_real.ads b/src/vhdl/vhdl-ieee-math_real.ads
new file mode 100644
index 000000000..7ba1e33e8
--- /dev/null
+++ b/src/vhdl/vhdl-ieee-math_real.ads
@@ -0,0 +1,24 @@
+--  Nodes recognizer for ieee.math_real.
+--  Copyright (C) 2019 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.
+
+package Vhdl.Ieee.Math_Real is
+   Math_Real_Pkg : Iir_Package_Declaration := Null_Iir;
+
+   --  Extract declarations from PKG (ieee.math_real).
+   procedure Extract_Declarations (Pkg : Iir_Package_Declaration);
+end Vhdl.Ieee.Math_Real;
diff --git a/src/vhdl/vhdl-ieee.adb b/src/vhdl/vhdl-ieee.adb
index 69d5196f0..9e861f378 100644
--- a/src/vhdl/vhdl-ieee.adb
+++ b/src/vhdl/vhdl-ieee.adb
@@ -20,8 +20,7 @@ with Vhdl.Utils; use Vhdl.Utils;
 with Vhdl.Std_Package;
 
 package body Vhdl.Ieee is
-   function Skip_Copyright_Notice (Decl : Iir) return Iir
-   is
+   function Skip_Copyright_Notice (Decl : Iir) return Iir is
    begin
       if Decl /= Null_Iir
         and then Get_Kind (Decl) = Iir_Kind_Constant_Declaration
diff --git a/src/vhdl/vhdl-nodes.ads b/src/vhdl/vhdl-nodes.ads
index 807069d2e..aa151c4d8 100644
--- a/src/vhdl/vhdl-nodes.ads
+++ b/src/vhdl/vhdl-nodes.ads
@@ -4873,7 +4873,11 @@ package Vhdl.Nodes is
 
       --  Unary functions for numeric_std
       Iir_Predefined_Ieee_Numeric_Std_Neg_Uns,
-      Iir_Predefined_Ieee_Numeric_Std_Neg_Sgn
+      Iir_Predefined_Ieee_Numeric_Std_Neg_Sgn,
+
+      --  Math_Real
+      Iir_Predefined_Ieee_Math_Real_Ceil,
+      Iir_Predefined_Ieee_Math_Real_Log2
      );
 
    --  Return TRUE iff FUNC is a short-cut predefined function.
diff --git a/src/vhdl/vhdl-post_sems.adb b/src/vhdl/vhdl-post_sems.adb
index 4a8c96697..bcee6c47b 100644
--- a/src/vhdl/vhdl-post_sems.adb
+++ b/src/vhdl/vhdl-post_sems.adb
@@ -21,6 +21,7 @@ with Vhdl.Sem_Specs;
 with Vhdl.Ieee.Std_Logic_1164;
 with Vhdl.Ieee.Vital_Timing;
 with Vhdl.Ieee.Numeric;
+with Vhdl.Ieee.Math_Real;
 with Flags; use Flags;
 
 package body Vhdl.Post_Sems is
@@ -56,6 +57,8 @@ package body Vhdl.Post_Sems is
                   Vhdl.Ieee.Vital_Timing.Extract_Declarations (Lib_Unit);
                when Name_Numeric_Std =>
                   Vhdl.Ieee.Numeric.Extract_Std_Declarations (Lib_Unit);
+               when Name_Math_Real =>
+                  Vhdl.Ieee.Math_Real.Extract_Declarations (Lib_Unit);
                when others =>
                   null;
             end case;