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conversions

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This commit is contained in:
Pro7ech
2025-10-16 22:40:23 +02:00
parent 93e0671eda
commit 920b925216
2 changed files with 177 additions and 140 deletions
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134
poulpy-core/src/conversion/lwe_to_glwe.rs
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@@ -1,79 +1,67 @@
use poulpy_hal::{
api::{
ScratchAvailable, VecZnxBigAddSmallInplace, VecZnxBigNormalize, VecZnxBigNormalizeTmpBytes, VecZnxDftApply,
VecZnxDftBytesOf, VecZnxIdftApplyConsume, VecZnxNormalize, VecZnxNormalizeTmpBytes, VmpApplyDftToDft,
VmpApplyDftToDftAdd, VmpApplyDftToDftTmpBytes,
},
layouts::{Backend, DataMut, DataRef, Module, Scratch, VecZnx, ZnxView, ZnxViewMut, ZnxZero},
api::ScratchTakeBasic,
layouts::{Backend, DataMut, Module, Scratch, VecZnx, ZnxView, ZnxViewMut, ZnxZero},
};
use crate::layouts::{GGLWEInfos, GLWE, GLWEInfos, GLWELayout, LWE, LWEInfos, prepared::LWEToGLWESwitchingKeyPrepared};
use crate::{
GLWEKeyswitch, ScratchTakeCore,
layouts::{
GGLWEInfos, GLWE, GLWEAlloc, GLWEInfos, GLWELayout, GLWEToMut, LWE, LWEInfos, LWEToRef,
prepared::{LWEToGLWESwitchingKeyPrepared, LWEToGLWESwitchingKeyPreparedToRef},
},
};
impl GLWE<Vec<u8>> {
pub fn from_lwe_tmp_bytes<B: Backend, OUT, IN, KEY>(
module: &Module<B>,
glwe_infos: &OUT,
lwe_infos: &IN,
key_infos: &KEY,
) -> usize
impl<BE: Backend> GLWEFromLWE<BE> for Module<BE> where Self: GLWEKeyswitch<BE> + GLWEAlloc {}
pub trait GLWEFromLWE<BE: Backend>
where
Self: GLWEKeyswitch<BE> + GLWEAlloc,
{
fn glwe_from_lwe_tmp_bytes<R, A, K>(&self, glwe_infos: &R, lwe_infos: &A, key_infos: &K) -> usize
where
OUT: GLWEInfos,
IN: LWEInfos,
KEY: GGLWEInfos,
Module<B>: VecZnxDftBytesOf + VmpApplyDftToDftTmpBytes + VecZnxBigNormalizeTmpBytes + VecZnxNormalizeTmpBytes,
R: GLWEInfos,
A: LWEInfos,
K: GGLWEInfos,
{
let ct: usize = GLWE::bytes_of(
module.n().into(),
let ct: usize = self.bytes_of_glwe(
key_infos.base2k(),
lwe_infos.k().max(glwe_infos.k()),
1u32.into(),
);
let ks: usize = GLWE::keyswitch_inplace_tmp_bytes(module, glwe_infos, key_infos);
let ks: usize = self.glwe_keyswitch_tmp_bytes(glwe_infos, glwe_infos, key_infos);
if lwe_infos.base2k() == key_infos.base2k() {
ct + ks
} else {
let a_conv = VecZnx::bytes_of(module.n(), 1, lwe_infos.size()) + module.vec_znx_normalize_tmp_bytes();
let a_conv = VecZnx::bytes_of(self.n(), 1, lwe_infos.size()) + self.vec_znx_normalize_tmp_bytes();
ct + a_conv + ks
}
}
}
impl<D: DataMut> GLWE<D> {
pub fn from_lwe<DLwe, DKsk, B: Backend>(
&mut self,
module: &Module<B>,
lwe: &LWE<DLwe>,
ksk: &LWEToGLWESwitchingKeyPrepared<DKsk, B>,
scratch: &mut Scratch<B>,
) where
DLwe: DataRef,
DKsk: DataRef,
Module<B>: VecZnxDftBytesOf
+ VmpApplyDftToDftTmpBytes
+ VecZnxBigNormalizeTmpBytes
+ VmpApplyDftToDft<B>
+ VmpApplyDftToDftAdd<B>
+ VecZnxDftApply<B>
+ VecZnxIdftApplyConsume<B>
+ VecZnxBigAddSmallInplace<B>
+ VecZnxBigNormalize<B>
+ VecZnxNormalize<B>
+ VecZnxNormalizeTmpBytes,
Scratch<B>: ScratchAvailable,
fn glwe_from_lwe<R, A, K>(&self, res: &mut R, lwe: &A, ksk: &K, scratch: &mut Scratch<BE>)
where
R: GLWEToMut,
A: LWEToRef,
K: LWEToGLWESwitchingKeyPreparedToRef<BE>,
Scratch<BE>: ScratchTakeCore<BE>,
{
#[cfg(debug_assertions)]
{
assert_eq!(self.n(), module.n() as u32);
assert_eq!(ksk.n(), module.n() as u32);
assert!(lwe.n() <= module.n() as u32);
}
let res: &mut GLWE<&mut [u8]> = &mut res.to_mut();
let lwe: &LWE<&[u8]> = &lwe.to_ref();
let ksk: &LWEToGLWESwitchingKeyPrepared<&[u8], BE> = &ksk.to_ref();
let (mut glwe, scratch_1) = scratch.take_glwe_ct(&GLWELayout {
n: ksk.n(),
base2k: ksk.base2k(),
k: lwe.k(),
rank: 1u32.into(),
});
assert_eq!(res.n(), self.n() as u32);
assert_eq!(ksk.n(), self.n() as u32);
assert!(lwe.n() <= self.n() as u32);
let (mut glwe, scratch_1) = scratch.take_glwe_ct(
self,
&GLWELayout {
n: ksk.n(),
base2k: ksk.base2k(),
k: lwe.k(),
rank: 1u32.into(),
},
);
glwe.data.zero();
let n_lwe: usize = lwe.n().into();
@@ -85,14 +73,14 @@ impl<D: DataMut> GLWE<D> {
glwe.data.at_mut(1, i)[..n_lwe].copy_from_slice(&data_lwe[1..]);
}
} else {
let (mut a_conv, scratch_2) = scratch_1.take_vec_znx(module.n(), 1, lwe.size());
let (mut a_conv, scratch_2) = scratch_1.take_vec_znx(self, 1, lwe.size());
a_conv.zero();
for j in 0..lwe.size() {
let data_lwe: &[i64] = lwe.data.at(0, j);
a_conv.at_mut(0, j)[0] = data_lwe[0]
}
module.vec_znx_normalize(
self.vec_znx_normalize(
ksk.base2k().into(),
&mut glwe.data,
0,
@@ -108,7 +96,7 @@ impl<D: DataMut> GLWE<D> {
a_conv.at_mut(0, j)[..n_lwe].copy_from_slice(&data_lwe[1..]);
}
module.vec_znx_normalize(
self.vec_znx_normalize(
ksk.base2k().into(),
&mut glwe.data,
1,
@@ -119,6 +107,30 @@ impl<D: DataMut> GLWE<D> {
);
}
self.keyswitch(module, &glwe, &ksk.0, scratch_1);
self.glwe_keyswitch(res, &glwe, &ksk.0, scratch_1);
}
}
impl GLWE<Vec<u8>> {
pub fn from_lwe_tmp_bytes<R, A, K, M, BE: Backend>(module: &M, glwe_infos: &R, lwe_infos: &A, key_infos: &K) -> usize
where
R: GLWEInfos,
A: LWEInfos,
K: GGLWEInfos,
M: GLWEFromLWE<BE>,
{
module.glwe_from_lwe_tmp_bytes(glwe_infos, lwe_infos, key_infos)
}
}
impl<D: DataMut> GLWE<D> {
pub fn from_lwe<A, K, M, BE: Backend>(&mut self, module: &M, lwe: &A, ksk: &K, scratch: &mut Scratch<BE>)
where
M: GLWEFromLWE<BE>,
A: LWEToRef,
K: LWEToGLWESwitchingKeyPreparedToRef<BE>,
Scratch<BE>: ScratchTakeCore<BE>,
{
module.glwe_from_lwe(self, lwe, ksk, scratch);
}
}