poulpy_core/layouts/prepared/
glwe.rs

1use poulpy_hal::{
2    api::{VecZnxDftAlloc, VecZnxDftApply, VecZnxDftBytesOf},
3    layouts::{Backend, Data, DataMut, DataRef, Module, VecZnxDft, VecZnxDftToMut, VecZnxDftToRef, ZnxInfos},
4};
5
6use crate::layouts::{Base2K, Degree, GLWE, GLWEInfos, GLWEToRef, GetDegree, LWEInfos, Rank, TorusPrecision};
7
8#[derive(PartialEq, Eq)]
9pub struct GLWEPrepared<D: Data, B: Backend> {
10    pub(crate) data: VecZnxDft<D, B>,
11    pub(crate) base2k: Base2K,
12    pub(crate) k: TorusPrecision,
13}
14
15impl<D: Data, B: Backend> LWEInfos for GLWEPrepared<D, B> {
16    fn base2k(&self) -> Base2K {
17        self.base2k
18    }
19
20    fn k(&self) -> TorusPrecision {
21        self.k
22    }
23
24    fn size(&self) -> usize {
25        self.data.size()
26    }
27
28    fn n(&self) -> Degree {
29        Degree(self.data.n() as u32)
30    }
31}
32
33impl<D: Data, B: Backend> GLWEInfos for GLWEPrepared<D, B> {
34    fn rank(&self) -> Rank {
35        Rank(self.data.cols() as u32 - 1)
36    }
37}
38
39pub trait GLWEPreparedFactory<B: Backend>
40where
41    Self: GetDegree + VecZnxDftAlloc<B> + VecZnxDftBytesOf + VecZnxDftApply<B>,
42{
43    fn alloc_glwe_prepared(&self, base2k: Base2K, k: TorusPrecision, rank: Rank) -> GLWEPrepared<Vec<u8>, B> {
44        GLWEPrepared {
45            data: self.vec_znx_dft_alloc((rank + 1).into(), k.0.div_ceil(base2k.0) as usize),
46            base2k,
47            k,
48        }
49    }
50
51    fn alloc_glwe_prepared_from_infos<A>(&self, infos: &A) -> GLWEPrepared<Vec<u8>, B>
52    where
53        A: GLWEInfos,
54    {
55        self.alloc_glwe_prepared(infos.base2k(), infos.k(), infos.rank())
56    }
57
58    fn bytes_of_glwe_prepared(&self, base2k: Base2K, k: TorusPrecision, rank: Rank) -> usize {
59        self.bytes_of_vec_znx_dft((rank + 1).into(), k.0.div_ceil(base2k.0) as usize)
60    }
61
62    fn bytes_of_glwe_prepared_from_infos<A>(&self, infos: &A) -> usize
63    where
64        A: GLWEInfos,
65    {
66        self.bytes_of_glwe_prepared(infos.base2k(), infos.k(), infos.rank())
67    }
68
69    fn prepare_glwe<R, O>(&self, res: &mut R, other: &O)
70    where
71        R: GLWEPreparedToMut<B>,
72        O: GLWEToRef,
73    {
74        {
75            let mut res: GLWEPrepared<&mut [u8], B> = res.to_mut();
76            let other: GLWE<&[u8]> = other.to_ref();
77
78            assert_eq!(res.n(), self.ring_degree());
79            assert_eq!(other.n(), self.ring_degree());
80            assert_eq!(res.size(), other.size());
81            assert_eq!(res.k(), other.k());
82            assert_eq!(res.base2k(), other.base2k());
83
84            for i in 0..(res.rank() + 1).into() {
85                self.vec_znx_dft_apply(1, 0, &mut res.data, i, &other.data, i);
86            }
87        }
88    }
89}
90
91impl<B: Backend> GLWEPreparedFactory<B> for Module<B> where Self: VecZnxDftAlloc<B> + VecZnxDftBytesOf + VecZnxDftApply<B> {}
92
93impl<B: Backend> GLWEPrepared<Vec<u8>, B> {
94    pub fn alloc_from_infos<A, M>(module: &M, infos: &A) -> Self
95    where
96        A: GLWEInfos,
97        M: GLWEPreparedFactory<B>,
98    {
99        module.alloc_glwe_prepared_from_infos(infos)
100    }
101
102    pub fn alloc<M>(module: &M, base2k: Base2K, k: TorusPrecision, rank: Rank) -> Self
103    where
104        M: GLWEPreparedFactory<B>,
105    {
106        module.alloc_glwe_prepared(base2k, k, rank)
107    }
108
109    pub fn bytes_of_from_infos<A, M>(module: &M, infos: &A) -> usize
110    where
111        A: GLWEInfos,
112        M: GLWEPreparedFactory<B>,
113    {
114        module.bytes_of_glwe_prepared_from_infos(infos)
115    }
116
117    pub fn bytes_of<M>(module: &M, base2k: Base2K, k: TorusPrecision, rank: Rank) -> usize
118    where
119        M: GLWEPreparedFactory<B>,
120    {
121        module.bytes_of_glwe_prepared(base2k, k, rank)
122    }
123}
124
125impl<D: DataMut, B: Backend> GLWEPrepared<D, B> {
126    pub fn prepare<O, M>(&mut self, module: &M, other: &O)
127    where
128        O: GLWEToRef,
129        M: GLWEPreparedFactory<B>,
130    {
131        module.prepare_glwe(self, other);
132    }
133}
134
135pub trait GLWEPreparedToMut<B: Backend> {
136    fn to_mut(&mut self) -> GLWEPrepared<&mut [u8], B>;
137}
138
139impl<D: DataMut, B: Backend> GLWEPreparedToMut<B> for GLWEPrepared<D, B> {
140    fn to_mut(&mut self) -> GLWEPrepared<&mut [u8], B> {
141        GLWEPrepared {
142            k: self.k,
143            base2k: self.base2k,
144            data: self.data.to_mut(),
145        }
146    }
147}
148
149pub trait GLWEPreparedToRef<B: Backend> {
150    fn to_ref(&self) -> GLWEPrepared<&[u8], B>;
151}
152
153impl<D: DataRef, B: Backend> GLWEPreparedToRef<B> for GLWEPrepared<D, B> {
154    fn to_ref(&self) -> GLWEPrepared<&[u8], B> {
155        GLWEPrepared {
156            data: self.data.to_ref(),
157            k: self.k,
158            base2k: self.base2k,
159        }
160    }
161}
poulpy_core/layouts/prepared/glwe.rs

poulpy_core/layouts/prepared/
glwe.rs
