alu: error flag setzen bei overflow/underflow bzw. bei division durch 0

[hwmod.git] / src / gen_pkg.vhd

diff --git a/src/gen_pkg.vhd b/src/gen_pkg.vhd
index e654a3b24d5597ce54230ae777d81a22325c6680..7f5e2dc30b387cbc02456b7276f66ac4fa648bd0 100644 (file)
--- a/src/gen_pkg.vhd
+++ b/src/gen_pkg.vhd
@@ -13,9 +13,16 @@ package gen_pkg is
 
        constant CBITS : integer := 32;
        subtype csigned is signed((CBITS-1) downto 0);
-       --TODO: bei CBITS-1 gibts einen overflow :/
-       subtype cinteger is integer range -(2**(CBITS-2)) to ((2**(CBITS-2))-1);
+       -- integer ist 32bit (31bit + sign)
+       subtype cinteger is integer;
+
+       subtype hspalte is std_logic_vector(6 downto 0);
+       subtype hzeile is std_logic_vector(4 downto 0);
+       subtype hbyte is std_logic_vector(7 downto 0);
+       subtype hstring is string(1 to 71);
+
        function find_msb(a : csigned) return natural;
+       procedure icwait(signal clk_i : IN std_logic; cycles: Natural);
 end package gen_pkg;
 
 package body gen_pkg is
@@ -28,5 +35,12 @@ package body gen_pkg is
                end loop;
                return (CBITS - r);
        end function find_msb;
+
+       procedure icwait(signal clk_i : IN std_logic; cycles: Natural) is
+       begin
+               for i in 1 to cycles loop
+                       wait until clk_i= '0' and clk_i'event;
+               end loop;
+       end;
 end package body gen_pkg;