blob: 176bf7c9c33d5ff45c5b27c5e6ad997586bcdf8c (
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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity ent is
generic (
INT : integer := -25;
SL : std_logic := '1'
);
port (
a : in signed(7 downto 0);
b : in signed(7 downto 0);
const : out signed(7 downto 0);
absolute1 : out unsigned(7 downto 0);
absolute2 : out unsigned(7 downto 0);
sum : out signed(8 downto 0);
diff : out signed(8 downto 0);
inv_diff : out signed(8 downto 0);
quarter : out signed(7 downto 0);
int_sum : out signed(8 downto 0);
int_diff : out signed(8 downto 0);
inv_int_sum : out signed(8 downto 0);
inv_int_diff : out signed(8 downto 0);
sl_sum : out signed(8 downto 0);
sl_diff : out signed(8 downto 0);
inv_sl_sum : out signed(8 downto 0);
inv_sl_diff : out signed(8 downto 0);
lt : out boolean;
le : out boolean;
eq : out boolean;
neq : out boolean;
ge : out boolean;
gt : out boolean;
int_lt : out boolean;
int_le : out boolean;
int_eq : out boolean;
int_neq : out boolean;
int_ge : out boolean;
int_gt : out boolean;
inv_int_lt : out boolean;
inv_int_le : out boolean;
inv_int_eq : out boolean;
inv_int_neq : out boolean;
inv_int_ge : out boolean;
inv_int_gt : out boolean
);
end;
architecture a of ent is
signal ra, rb : signed(8 downto 0);
begin
ra <= resize(a, 9);
rb <= resize(b, 9);
const <= to_signed(INT, const'length);
absolute1 <= to_unsigned(abs(INT), absolute1'length);
absolute2 <= unsigned(abs(a));
sum <= ra + rb;
diff <= ra + (-rb);
inv_diff <= rb - ra;
quarter <= a / 4;
int_sum <= ra + INT;
int_diff <= ra - INT;
inv_int_sum <= INT + ra;
inv_int_diff <= INT - ra;
sl_sum <= ra + SL;
sl_diff <= ra - SL;
inv_sl_sum <= SL + ra;
inv_sl_diff <= SL - ra;
lt <= a < b;
le <= a <= b;
eq <= a = b;
neq <= a /= b;
ge <= a >= b;
gt <= a > b;
int_lt <= a < INT;
int_le <= a <= INT;
int_eq <= a = INT;
int_neq <= a /= INT;
int_ge <= a >= INT;
int_gt <= a > INT;
inv_int_lt <= INT < b;
inv_int_le <= INT <= b;
inv_int_eq <= INT = b;
inv_int_neq <= INT /= b;
inv_int_ge <= INT >= b;
inv_int_gt <= INT > b;
end;
|
