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partial fheuint preparation

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Rasoul Akhavan Mahdavi
2025-11-07 00:47:29 -05:00
parent c32db7d963
commit 5cf184d950
1 changed files with 47 additions and 0 deletions
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47
poulpy-schemes/src/tfhe/bdd_arithmetic/ciphertexts/fhe_uint_prepared.rs
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@@ -217,6 +217,18 @@ pub trait FheUintPrepare<BRA: BlindRotationAlgo, T: UnsignedInteger, BE: Backend
DB: DataRef, DB: DataRef,
DK: DataRef, DK: DataRef,
K: BDDKeyHelper<DK, BRA, BE>; K: BDDKeyHelper<DK, BRA, BE>;
fn fhe_uint_prepare_partial<DM, DB, DK, K>(
&self,
res: &mut FheUintPrepared<DM, T, BE>,
bits: &FheUint<DB, T>,
count: usize,
key: &K,
scratch: &mut Scratch<BE>,
) where
DM: DataMut,
DB: DataRef,
DK: DataRef,
K: BDDKeyHelper<DK, BRA, BE>;
} }
impl<BRA: BlindRotationAlgo, BE: Backend, T: UnsignedInteger> FheUintPrepare<BRA, T, BE> for Module<BE> impl<BRA: BlindRotationAlgo, BE: Backend, T: UnsignedInteger> FheUintPrepare<BRA, T, BE> for Module<BE>
@@ -259,6 +271,30 @@ where
dst.prepare(self, &tmp_ggsw, scratch_1); dst.prepare(self, &tmp_ggsw, scratch_1);
} }
} }
fn fhe_uint_prepare_partial<DM, DB, DK, K>(
&self,
res: &mut FheUintPrepared<DM, T, BE>,
bits: &FheUint<DB, T>,
count: usize,
key: &K,
scratch: &mut Scratch<BE>,
) where
DM: DataMut,
DB: DataRef,
DK: DataRef,
K: BDDKeyHelper<DK, BRA, BE>,
{
let (cbt, ks) = key.get_cbt_key();
let mut lwe: LWE<Vec<u8>> = LWE::alloc_from_infos(bits); //TODO: add TakeLWE
let (mut tmp_ggsw, scratch_1) = scratch.take_ggsw(res);
for (bit, dst) in res.bits[0..count].iter_mut().enumerate() { // TODO: set the rest of the bits to a prepared zero GGSW
bits.get_bit_lwe(self, bit, &mut lwe, ks, scratch_1);
cbt.execute_to_constant(self, &mut tmp_ggsw, &lwe, 1, 1, scratch_1);
dst.prepare(self, &tmp_ggsw, scratch_1);
}
}
} }
impl<D: DataMut, T: UnsignedInteger, BE: Backend> FheUintPrepared<D, T, BE> { impl<D: DataMut, T: UnsignedInteger, BE: Backend> FheUintPrepared<D, T, BE> {
@@ -273,4 +309,15 @@ impl<D: DataMut, T: UnsignedInteger, BE: Backend> FheUintPrepared<D, T, BE> {
{ {
module.fhe_uint_prepare(self, other, key, scratch); module.fhe_uint_prepare(self, other, key, scratch);
} }
pub fn prepare_partial<BRA, M, O, K, DK>(&mut self, module: &M, other: &FheUint<O, T>, count: usize, key: &K, scratch: &mut Scratch<BE>)
where
BRA: BlindRotationAlgo,
O: DataRef,
DK: DataRef,
K: BDDKeyHelper<DK, BRA, BE>,
M: FheUintPrepare<BRA, T, BE>,
Scratch<BE>: ScratchTakeCore<BE>,
{
module.fhe_uint_prepare_partial(self, other, count, key, scratch);
}
} }