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
|
use minimal_lexical::extended_float::ExtendedFloat;
use minimal_lexical::rounding;
#[test]
fn round_test() {
let mut fp = ExtendedFloat {
mant: 9223372036854776832,
exp: -10,
};
rounding::round::<f64, _>(&mut fp, |f, s| {
f.mant >>= s;
f.exp += s;
});
assert_eq!(fp.mant, 0);
assert_eq!(fp.exp, 1);
let mut fp = ExtendedFloat {
mant: 9223372036854776832,
exp: -10,
};
rounding::round::<f64, _>(&mut fp, |f, s| {
f.mant >>= s;
f.exp += s;
// Round-up.
f.mant += 1;
});
assert_eq!(fp.mant, 1);
assert_eq!(fp.exp, 1);
// Round-down
let mut fp = ExtendedFloat {
mant: 9223372036854776832,
exp: -10,
};
rounding::round::<f64, _>(&mut fp, |f, s| {
rounding::round_nearest_tie_even(f, s, |is_odd, is_halfway, is_above| {
is_above || (is_odd && is_halfway)
});
});
assert_eq!(fp.mant, 0);
assert_eq!(fp.exp, 1);
// Round up
let mut fp = ExtendedFloat {
mant: 9223372036854778880,
exp: -10,
};
rounding::round::<f64, _>(&mut fp, |f, s| {
rounding::round_nearest_tie_even(f, s, |is_odd, is_halfway, is_above| {
is_above || (is_odd && is_halfway)
});
});
assert_eq!(fp.mant, 2);
assert_eq!(fp.exp, 1);
// Round down
let mut fp = ExtendedFloat {
mant: 9223372036854778880,
exp: -10,
};
rounding::round::<f64, _>(&mut fp, rounding::round_down);
assert_eq!(fp.mant, 1);
assert_eq!(fp.exp, 1);
}
|
