poulpy_core/layouts/prepared/
gglwe_tsk.rs

1use poulpy_hal::{
2    api::{VmpPMatAlloc, VmpPMatAllocBytes, VmpPrepare},
3    layouts::{Backend, Data, DataMut, DataRef, Module, Scratch, VmpPMat},
4};
5
6use crate::layouts::{
7    GGLWETensorKey, Infos,
8    prepared::{GGLWESwitchingKeyPrepared, Prepare, PrepareAlloc},
9};
10
11#[derive(PartialEq, Eq)]
12pub struct GGLWETensorKeyPrepared<D: Data, B: Backend> {
13    pub(crate) keys: Vec<GGLWESwitchingKeyPrepared<D, B>>,
14}
15
16impl<B: Backend> GGLWETensorKeyPrepared<Vec<u8>, B> {
17    pub fn alloc(module: &Module<B>, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> Self
18    where
19        Module<B>: VmpPMatAlloc<B>,
20    {
21        let mut keys: Vec<GGLWESwitchingKeyPrepared<Vec<u8>, B>> = Vec::new();
22        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
23        (0..pairs).for_each(|_| {
24            keys.push(GGLWESwitchingKeyPrepared::alloc(
25                module, basek, k, rows, digits, 1, rank,
26            ));
27        });
28        Self { keys }
29    }
30
31    pub fn bytes_of(module: &Module<B>, basek: usize, k: usize, rows: usize, digits: usize, rank: usize) -> usize
32    where
33        Module<B>: VmpPMatAllocBytes,
34    {
35        let pairs: usize = (((rank + 1) * rank) >> 1).max(1);
36        pairs * GGLWESwitchingKeyPrepared::bytes_of(module, basek, k, rows, digits, 1, rank)
37    }
38}
39
40impl<D: Data, B: Backend> Infos for GGLWETensorKeyPrepared<D, B> {
41    type Inner = VmpPMat<D, B>;
42
43    fn inner(&self) -> &Self::Inner {
44        self.keys[0].inner()
45    }
46
47    fn basek(&self) -> usize {
48        self.keys[0].basek()
49    }
50
51    fn k(&self) -> usize {
52        self.keys[0].k()
53    }
54}
55
56impl<D: Data, B: Backend> GGLWETensorKeyPrepared<D, B> {
57    pub fn rank(&self) -> usize {
58        self.keys[0].rank()
59    }
60
61    pub fn rank_in(&self) -> usize {
62        self.keys[0].rank_in()
63    }
64
65    pub fn rank_out(&self) -> usize {
66        self.keys[0].rank_out()
67    }
68
69    pub fn digits(&self) -> usize {
70        self.keys[0].digits()
71    }
72}
73
74impl<D: DataMut, B: Backend> GGLWETensorKeyPrepared<D, B> {
75    // Returns a mutable reference to GLWESwitchingKey_{s}(s[i] * s[j])
76    pub fn at_mut(&mut self, mut i: usize, mut j: usize) -> &mut GGLWESwitchingKeyPrepared<D, B> {
77        if i > j {
78            std::mem::swap(&mut i, &mut j);
79        };
80        let rank: usize = self.rank();
81        &mut self.keys[i * rank + j - (i * (i + 1) / 2)]
82    }
83}
84
85impl<D: DataRef, B: Backend> GGLWETensorKeyPrepared<D, B> {
86    // Returns a reference to GLWESwitchingKey_{s}(s[i] * s[j])
87    pub fn at(&self, mut i: usize, mut j: usize) -> &GGLWESwitchingKeyPrepared<D, B> {
88        if i > j {
89            std::mem::swap(&mut i, &mut j);
90        };
91        let rank: usize = self.rank();
92        &self.keys[i * rank + j - (i * (i + 1) / 2)]
93    }
94}
95
96impl<D: DataMut, DR: DataRef, B: Backend> Prepare<B, GGLWETensorKey<DR>> for GGLWETensorKeyPrepared<D, B>
97where
98    Module<B>: VmpPrepare<B>,
99{
100    fn prepare(&mut self, module: &Module<B>, other: &GGLWETensorKey<DR>, scratch: &mut Scratch<B>) {
101        #[cfg(debug_assertions)]
102        {
103            assert_eq!(self.keys.len(), other.keys.len());
104        }
105        self.keys
106            .iter_mut()
107            .zip(other.keys.iter())
108            .for_each(|(a, b)| {
109                a.prepare(module, b, scratch);
110            });
111    }
112}
113
114impl<D: DataRef, B: Backend> PrepareAlloc<B, GGLWETensorKeyPrepared<Vec<u8>, B>> for GGLWETensorKey<D>
115where
116    Module<B>: VmpPMatAlloc<B> + VmpPrepare<B>,
117{
118    fn prepare_alloc(&self, module: &Module<B>, scratch: &mut Scratch<B>) -> GGLWETensorKeyPrepared<Vec<u8>, B> {
119        let mut tsk_prepared: GGLWETensorKeyPrepared<Vec<u8>, B> = GGLWETensorKeyPrepared::alloc(
120            module,
121            self.basek(),
122            self.k(),
123            self.rows(),
124            self.digits(),
125            self.rank(),
126        );
127        tsk_prepared.prepare(module, self, scratch);
128        tsk_prepared
129    }
130}
poulpy_core/layouts/prepared/gglwe_tsk.rs

poulpy_core/layouts/prepared/
gglwe_tsk.rs
