Hello all
I want to multiply two signed 8-bit numbers and pick 8 bits from the result.
My code is like this:
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity test is
Port ( k : in std_logic_vector(7 downto 0);
x : in std_logic_vector(7 downto 0);
y : out std_logic_vector(7 downto 0));
end test;
architecture beh of test is
signal kx : std_logic_vector(15 downto 0);
constant Offset : integer := 4;
begin
kx
They're just warnings, and quite valid ones, so I'm not sure why you want to get rid of them.
If you're not going to use the high order bits, then why calculate them? Surely kx should only be from 7+Offset downto 0
That would get rid of the first warning, though may produce one about kx not being of sufficient size for the 8x8 result (or some other such warning).
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