blob: 0a544649bf12daaf3830d4b4b0c6d55201f86a21 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
library ieee;
use ieee.std_logic_1164.all;
library ieee;
use ieee.numeric_std.all;
entity sub_563 is
port (
result : out std_logic_vector(31 downto 0);
in_a : in std_logic_vector(31 downto 0);
in_b : in std_logic_vector(31 downto 0)
);
end sub_563;
architecture augh of sub_563 is
signal carry_inA : std_logic_vector(33 downto 0);
signal carry_inB : std_logic_vector(33 downto 0);
signal carry_res : std_logic_vector(33 downto 0);
begin
-- To handle the CI input, the operation is '0' - CI
-- If CI is not present, the operation is '0' - '0'
carry_inA <= '0' & in_a & '0';
carry_inB <= '0' & in_b & '0';
-- Compute the result
carry_res <= std_logic_vector(unsigned(carry_inA) - unsigned(carry_inB));
-- Set the outputs
result <= carry_res(32 downto 1);
end architecture;
|
