cfx_math/nth_root/root_degree/
mod.rs

1mod exponential_table;
2mod logarithmic_table;
3
4use self::exponential_table::{make_table_u32, make_table_u64, search_table};
5pub use self::logarithmic_table::{
6    cbrt_lookup, rt4_lookup, rt5_lookup, sqrt_lookup,
7};
8use super::const_generic::SubU1;
9use typenum::{Unsigned, U10, U11, U12, U2, U3, U4, U5, U6, U7, U8, U9};
10
11pub trait RootDegree: Unsigned + SubU1 {
12    const LOOKUP_BITS: u32 = 0;
13
14    fn nth_root_lookup(_input: u64) -> u64 { unimplemented!() }
15}
16
17impl RootDegree for U2 {
18    const LOOKUP_BITS: u32 = 16;
19
20    #[inline]
21    fn nth_root_lookup(input: u64) -> u64 { sqrt_lookup(input) }
22}
23
24impl RootDegree for U3 {
25    const LOOKUP_BITS: u32 = 20;
26
27    #[inline]
28    fn nth_root_lookup(input: u64) -> u64 { cbrt_lookup(input) }
29}
30
31impl RootDegree for U4 {
32    const LOOKUP_BITS: u32 = 25;
33
34    #[inline]
35    fn nth_root_lookup(input: u64) -> u64 { rt4_lookup(input) }
36}
37
38impl RootDegree for U5 {
39    const LOOKUP_BITS: u32 = 28;
40
41    #[inline]
42    fn nth_root_lookup(input: u64) -> u64 { rt5_lookup(input) }
43}
44impl RootDegree for U6 {
45    const LOOKUP_BITS: u32 = 30;
46
47    #[inline]
48    fn nth_root_lookup(input: u64) -> u64 {
49        const TABLE: [u32; 32] = make_table_u32(6);
50        search_table::<_, 32>(input, &TABLE, 6)
51    }
52}
53impl RootDegree for U7 {
54    const LOOKUP_BITS: u32 = 28;
55
56    #[inline]
57    fn nth_root_lookup(input: u64) -> u64 {
58        const TABLE: [u32; 16] = make_table_u32(7);
59        search_table::<_, 16>(input, &TABLE, 7)
60    }
61}
62impl RootDegree for U8 {
63    const LOOKUP_BITS: u32 = 32;
64
65    #[inline]
66    fn nth_root_lookup(input: u64) -> u64 {
67        const TABLE: [u32; 16] = make_table_u32(8);
68        search_table::<_, 16>(input, &TABLE, 8)
69    }
70}
71impl RootDegree for U9 {
72    const LOOKUP_BITS: u32 = 36;
73
74    #[inline]
75    fn nth_root_lookup(input: u64) -> u64 {
76        const TABLE: [u64; 16] = make_table_u64(9);
77        search_table::<_, 16>(input, &TABLE, 9)
78    }
79}
80impl RootDegree for U10 {
81    const LOOKUP_BITS: u32 = 40;
82
83    #[inline]
84    fn nth_root_lookup(input: u64) -> u64 {
85        const TABLE: [u64; 16] = make_table_u64(10);
86        search_table::<_, 16>(input, &TABLE, 10)
87    }
88}
89impl RootDegree for U11 {
90    const LOOKUP_BITS: u32 = 44;
91
92    #[inline]
93    fn nth_root_lookup(input: u64) -> u64 {
94        const TABLE: [u64; 16] = make_table_u64(11);
95        search_table::<_, 16>(input, &TABLE, 11)
96    }
97}
98impl RootDegree for U12 {
99    const LOOKUP_BITS: u32 = 48;
100
101    #[inline]
102    fn nth_root_lookup(input: u64) -> u64 {
103        const TABLE: [u64; 16] = make_table_u64(12);
104        search_table::<_, 16>(input, &TABLE, 12)
105    }
106}
cfx_math/nth_root/root_degree/mod.rs

cfx_math/nth_root/root_degree/
mod.rs
