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Support for bivariate convolution & normalization with offset (#126)

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* Add bivariate-convolution
* Add pair-wise convolution + tests + benches
* Add take_cnv_pvec_[left/right] to Scratch & updated CHANGELOG.md
* cross-base2k normalization with positive offset
* clippy & fix CI doctest avx compile error
* more streamlined bounds derivation for normalization
* Working cross-base2k normalization with pos/neg offset
* Update normalization API & tests
* Add glwe tensoring test
* Add relinearization + preliminary test
* Fix GGLWEToGGSW key infos
* Add (X,Y) convolution by const (1, Y) poly
* Faster normalization test + add bench for cnv_by_const
* Update changelog
This commit is contained in:
Jean-Philippe Bossuat
2025-12-21 16:56:42 +01:00
committed by GitHub
parent 76424d0ab5
commit 4e90e08a71
219 changed files with 6571 additions and 5041 deletions
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23
poulpy-core/src/encryption/glwe.rs
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@@ -402,15 +402,7 @@ where
let mut ci_big = self.vec_znx_idft_apply_consume(ci_dft);
// ci_big = u * pk[i] + e
self.vec_znx_big_add_normal(
base2k,
&mut ci_big,
0,
pk.k().into(),
source_xe,
SIGMA,
SIGMA_BOUND,
);
self.vec_znx_big_add_normal(base2k, &mut ci_big, 0, pk.k().into(), source_xe, SIGMA, SIGMA_BOUND);
// ci_big = u * pk[i] + e + m (if col = i)
if let Some((pt, col)) = pt
@@ -420,7 +412,7 @@ where
}
// ct[i] = norm(ci_big)
self.vec_znx_big_normalize(base2k, &mut res.data, i, base2k, &ci_big, 0, scratch_2);
self.vec_znx_big_normalize(&mut res.data, base2k, 0, i, &ci_big, base2k, 0, scratch_2);
}
}
}
@@ -487,12 +479,7 @@ where
let sk: GLWESecretPrepared<&[u8], BE> = sk.to_ref();
if compressed {
assert_eq!(
ct.cols(),
1,
"invalid glwe: compressed tag=true but #cols={} != 1",
ct.cols()
)
assert_eq!(ct.cols(), 1, "invalid glwe: compressed tag=true but #cols={} != 1", ct.cols())
}
assert!(
@@ -537,7 +524,7 @@ where
let ci_big: VecZnxBig<&mut [u8], BE> = self.vec_znx_idft_apply_consume(ci_dft);
// use c[0] as buffer, which is overwritten later by the normalization step
self.vec_znx_big_normalize(base2k, &mut ci, 0, base2k, &ci_big, 0, scratch_3);
self.vec_znx_big_normalize(&mut ci, base2k, 0, 0, &ci_big, base2k, 0, scratch_3);
// c0_tmp = -c[i] * s[i] (use c[0] as buffer)
self.vec_znx_sub_inplace(&mut c0, 0, &ci, 0);
@@ -555,6 +542,6 @@ where
}
// c[0] = norm(c[0])
self.vec_znx_normalize(base2k, ct, 0, base2k, &c0, 0, scratch_1);
self.vec_znx_normalize(ct, base2k, 0, 0, &c0, base2k, 0, scratch_1);
}
}