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

* 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

poulpy-cpu-ref/benches/convolution.rs

@@ -0,0 +1,35 @@
+use criterion::{Criterion, criterion_group, criterion_main};
+use poulpy_cpu_ref::FFT64Ref;
+use poulpy_hal::bench_suite::convolution::{
+    bench_cnv_apply_dft, bench_cnv_by_const_apply, bench_cnv_pairwise_apply_dft, bench_cnv_prepare_left, bench_cnv_prepare_right,
+};
+
+fn bench_cnv_prepare_left_cpu_ref_fft64(c: &mut Criterion) {
+    bench_cnv_prepare_left::<FFT64Ref>(c, "cpu_ref::fft64");
+}
+
+fn bench_cnv_prepare_right_cpu_ref_fft64(c: &mut Criterion) {
+    bench_cnv_prepare_right::<FFT64Ref>(c, "cpu_ref::fft64");
+}
+
+fn bench_bench_cnv_apply_dft_cpu_ref_fft64(c: &mut Criterion) {
+    bench_cnv_apply_dft::<FFT64Ref>(c, "cpu_ref::fft64");
+}
+
+fn bench_bench_bench_cnv_pairwise_apply_dft_cpu_ref_fft64(c: &mut Criterion) {
+    bench_cnv_pairwise_apply_dft::<FFT64Ref>(c, "cpu_ref::fft64");
+}
+
+fn bench_cnv_by_const_apply_cpu_ref_fft64(c: &mut Criterion) {
+    bench_cnv_by_const_apply::<FFT64Ref>(c, "cpu_ref::fft64");
+}
+
+criterion_group!(
+    benches,
+    bench_cnv_prepare_left_cpu_ref_fft64,
+    bench_cnv_prepare_right_cpu_ref_fft64,
+    bench_bench_cnv_apply_dft_cpu_ref_fft64,
+    bench_bench_bench_cnv_pairwise_apply_dft_cpu_ref_fft64,
+    bench_cnv_by_const_apply_cpu_ref_fft64,
+);
+criterion_main!(benches);