1 // Copyright 2015-2022 Brian Smith.
2 //
3 // Permission to use, copy, modify, and/or distribute this software for any
4 // purpose with or without fee is hereby granted, provided that the above
5 // copyright notice and this permission notice appear in all copies.
6 //
7 // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
8 // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
10 // SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14 
15 use crate::limb::Limb;
16 
17 #[derive(Clone)]
18 #[repr(transparent)]
19 pub(in super::super) struct N0([Limb; 2]);
20 
21 impl N0 {
22     #[cfg(feature = "alloc")]
23     pub(super) const LIMBS_USED: usize = 64 / crate::limb::LIMB_BITS;
24 }
25 
26 impl From<u64> for N0 {
27     #[inline]
from(n0: u64) -> Self28     fn from(n0: u64) -> Self {
29         #[cfg(target_pointer_width = "64")]
30         {
31             Self([n0, 0])
32         }
33 
34         #[cfg(target_pointer_width = "32")]
35         {
36             Self([n0 as Limb, (n0 >> crate::limb::LIMB_BITS) as Limb])
37         }
38     }
39 }
40