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833520b163108de3a1e18cafd56ae5fe0e5ed106
poulpy/backend/src/vec_znx_big_ops.rs
Jean-Philippe Bossuat a295085724 refactor
2025-05-27 22:19:18 +02:00

619 lines
20 KiB
Rust
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use crate::ffi::vec_znx;
use crate::znx_base::{ZnxInfos, ZnxView, ZnxViewMut};
use crate::{
Backend, FFT64, Module, Scratch, VecZnx, VecZnxBig, VecZnxBigOwned, VecZnxBigToMut, VecZnxBigToRef, VecZnxScratch,
VecZnxToMut, VecZnxToRef, ZnxSliceSize, bytes_of_vec_znx_big,
};
pub trait VecZnxBigAlloc<B: Backend> {
/// Allocates a vector Z[X]/(X^N+1) that stores not normalized values.
fn new_vec_znx_big(&self, cols: usize, size: usize) -> VecZnxBigOwned<B>;
/// Returns a new [VecZnxBig] with the provided bytes array as backing array.
///
/// Behavior: takes ownership of the backing array.
///
/// # Arguments
///
/// * `cols`: the number of polynomials..
/// * `size`: the number of polynomials per column.
/// * `bytes`: a byte array of size at least [Module::bytes_of_vec_znx_big].
///
/// # Panics
/// If `bytes.len()` < [Module::bytes_of_vec_znx_big].
fn new_vec_znx_big_from_bytes(&self, cols: usize, size: usize, bytes: Vec<u8>) -> VecZnxBigOwned<B>;
// /// Returns a new [VecZnxBig] with the provided bytes array as backing array.
// ///
// /// Behavior: the backing array is only borrowed.
// ///
// /// # Arguments
// ///
// /// * `cols`: the number of polynomials..
// /// * `size`: the number of polynomials per column.
// /// * `bytes`: a byte array of size at least [Module::bytes_of_vec_znx_big].
// ///
// /// # Panics
// /// If `bytes.len()` < [Module::bytes_of_vec_znx_big].
// fn new_vec_znx_big_from_bytes_borrow(&self, cols: usize, size: usize, tmp_bytes: &mut [u8]) -> VecZnxBig<B>;
/// Returns the minimum number of bytes necessary to allocate
/// a new [VecZnxBig] through [VecZnxBig::from_bytes].
fn bytes_of_vec_znx_big(&self, cols: usize, size: usize) -> usize;
}
pub trait VecZnxBigOps<BACKEND: Backend> {
/// Adds `a` to `b` and stores the result on `c`.
fn vec_znx_big_add<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxBigToRef<BACKEND>,
B: VecZnxBigToRef<BACKEND>;
/// Adds `a` to `b` and stores the result on `b`.
fn vec_znx_big_add_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxBigToRef<BACKEND>;
/// Adds `a` to `b` and stores the result on `c`.
fn vec_znx_big_add_small<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxBigToRef<BACKEND>,
B: VecZnxToRef;
/// Adds `a` to `b` and stores the result on `b`.
fn vec_znx_big_add_small_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxToRef;
/// Subtracts `a` to `b` and stores the result on `c`.
fn vec_znx_big_sub<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxBigToRef<BACKEND>,
B: VecZnxBigToRef<BACKEND>;
/// Subtracts `a` from `b` and stores the result on `b`.
fn vec_znx_big_sub_ab_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxBigToRef<BACKEND>;
/// Subtracts `b` from `a` and stores the result on `b`.
fn vec_znx_big_sub_ba_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxBigToRef<BACKEND>;
/// Subtracts `b` from `a` and stores the result on `c`.
fn vec_znx_big_sub_small_a<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxToRef,
B: VecZnxBigToRef<BACKEND>;
/// Subtracts `a` from `res` and stores the result on `res`.
fn vec_znx_big_sub_small_a_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxToRef;
/// Subtracts `b` from `a` and stores the result on `c`.
fn vec_znx_big_sub_small_b<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxBigToRef<BACKEND>,
B: VecZnxToRef;
/// Subtracts `res` from `a` and stores the result on `res`.
fn vec_znx_big_sub_small_b_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxToRef;
/// Negates `a` inplace.
fn vec_znx_big_negate_inplace<A>(&self, a: &mut A, a_col: usize)
where
A: VecZnxBigToMut<BACKEND>;
/// Normalizes `a` and stores the result on `b`.
///
/// # Arguments
///
/// * `basek`: normalization basis.
/// * `tmp_bytes`: scratch space of size at least [VecZnxBigOps::vec_znx_big_normalize].
fn vec_znx_big_normalize<R, A>(&self, basek: usize, res: &mut R, res_col: usize, a: &A, a_col: usize, scratch: &mut Scratch)
where
R: VecZnxToMut,
A: VecZnxBigToRef<FFT64>;
/// Applies the automorphism X^i -> X^ik on `a` and stores the result on `b`.
fn vec_znx_big_automorphism<R, A>(&self, k: i64, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<BACKEND>,
A: VecZnxBigToRef<BACKEND>;
/// Applies the automorphism X^i -> X^ik on `a` and stores the result on `a`.
fn vec_znx_big_automorphism_inplace<A>(&self, k: i64, a: &mut A, a_col: usize)
where
A: VecZnxBigToMut<BACKEND>;
}
pub trait VecZnxBigScratch {
/// Returns the minimum number of bytes to apply [VecZnxBigOps::vec_znx_big_normalize].
fn vec_znx_big_normalize_tmp_bytes(&self) -> usize;
}
impl<B: Backend> VecZnxBigAlloc<B> for Module<B> {
fn new_vec_znx_big(&self, cols: usize, size: usize) -> VecZnxBigOwned<B> {
VecZnxBig::new(self, cols, size)
}
fn new_vec_znx_big_from_bytes(&self, cols: usize, size: usize, bytes: Vec<u8>) -> VecZnxBigOwned<B> {
VecZnxBig::new_from_bytes(self, cols, size, bytes)
}
fn bytes_of_vec_znx_big(&self, cols: usize, size: usize) -> usize {
bytes_of_vec_znx_big(self, cols, size)
}
}
impl VecZnxBigOps<FFT64> for Module<FFT64> {
fn vec_znx_big_add<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxBigToRef<FFT64>,
B: VecZnxBigToRef<FFT64>,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let b: VecZnxBig<&[u8], FFT64> = b.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(b.n(), self.n());
assert_eq!(res.n(), self.n());
assert_ne!(a.as_ptr(), b.as_ptr());
}
unsafe {
vec_znx::vec_znx_add(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
b.at_ptr(b_col, 0),
b.size() as u64,
b.sl() as u64,
)
}
}
fn vec_znx_big_add_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxBigToRef<FFT64>,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(res.n(), self.n());
}
unsafe {
vec_znx::vec_znx_add(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
res.at_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
)
}
}
fn vec_znx_big_sub<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxBigToRef<FFT64>,
B: VecZnxBigToRef<FFT64>,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let b: VecZnxBig<&[u8], FFT64> = b.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(b.n(), self.n());
assert_eq!(res.n(), self.n());
assert_ne!(a.as_ptr(), b.as_ptr());
}
unsafe {
vec_znx::vec_znx_sub(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
b.at_ptr(b_col, 0),
b.size() as u64,
b.sl() as u64,
)
}
}
fn vec_znx_big_sub_ab_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxBigToRef<FFT64>,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(res.n(), self.n());
}
unsafe {
vec_znx::vec_znx_sub(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
res.at_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
)
}
}
fn vec_znx_big_sub_ba_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxBigToRef<FFT64>,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(res.n(), self.n());
}
unsafe {
vec_znx::vec_znx_sub(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
res.at_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
)
}
}
fn vec_znx_big_sub_small_b<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxBigToRef<FFT64>,
B: VecZnxToRef,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let b: VecZnx<&[u8]> = b.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(b.n(), self.n());
assert_eq!(res.n(), self.n());
assert_ne!(a.as_ptr(), b.as_ptr());
}
unsafe {
vec_znx::vec_znx_sub(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
b.at_ptr(b_col, 0),
b.size() as u64,
b.sl() as u64,
)
}
}
fn vec_znx_big_sub_small_b_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxToRef,
{
let a: VecZnx<&[u8]> = a.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(res.n(), self.n());
}
unsafe {
vec_znx::vec_znx_sub(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
res.at_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
)
}
}
fn vec_znx_big_sub_small_a<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxToRef,
B: VecZnxBigToRef<FFT64>,
{
let a: VecZnx<&[u8]> = a.to_ref();
let b: VecZnxBig<&[u8], FFT64> = b.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(b.n(), self.n());
assert_eq!(res.n(), self.n());
assert_ne!(a.as_ptr(), b.as_ptr());
}
unsafe {
vec_znx::vec_znx_sub(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
b.at_ptr(b_col, 0),
b.size() as u64,
b.sl() as u64,
)
}
}
fn vec_znx_big_sub_small_a_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxToRef,
{
let a: VecZnx<&[u8]> = a.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(res.n(), self.n());
}
unsafe {
vec_znx::vec_znx_sub(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
res.at_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
)
}
}
fn vec_znx_big_add_small<R, A, B>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize, b: &B, b_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxBigToRef<FFT64>,
B: VecZnxToRef,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let b: VecZnx<&[u8]> = b.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(b.n(), self.n());
assert_eq!(res.n(), self.n());
assert_ne!(a.as_ptr(), b.as_ptr());
}
unsafe {
vec_znx::vec_znx_add(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
b.at_ptr(b_col, 0),
b.size() as u64,
b.sl() as u64,
)
}
}
fn vec_znx_big_add_small_inplace<R, A>(&self, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxToRef,
{
let a: VecZnx<&[u8]> = a.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(res.n(), self.n());
}
unsafe {
vec_znx::vec_znx_add(
self.ptr,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
res.at_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
)
}
}
fn vec_znx_big_negate_inplace<A>(&self, a: &mut A, a_col: usize)
where
A: VecZnxBigToMut<FFT64>,
{
let mut a: VecZnxBig<&mut [u8], FFT64> = a.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
}
unsafe {
vec_znx::vec_znx_negate(
self.ptr,
a.at_mut_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
)
}
}
fn vec_znx_big_normalize<R, A>(&self, basek: usize, res: &mut R, res_col: usize, a: &A, a_col: usize, scratch: &mut Scratch)
where
R: VecZnxToMut,
A: VecZnxBigToRef<FFT64>,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let mut res: VecZnx<&mut [u8]> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(res.n(), self.n());
//(Jay)Note: This is calling VezZnxOps::vec_znx_normalize_tmp_bytes and not VecZnxBigOps::vec_znx_big_normalize_tmp_bytes.
// In the FFT backend the tmp sizes are same but will be different in the NTT backend
// assert!(tmp_bytes.len() >= <Self as VecZnxOps<&mut [u8], & [u8]>>::vec_znx_normalize_tmp_bytes(&self));
// assert_alignement(tmp_bytes.as_ptr());
}
let (tmp_bytes, _) = scratch.tmp_slice(<Self as VecZnxBigScratch>::vec_znx_big_normalize_tmp_bytes(
&self,
));
unsafe {
vec_znx::vec_znx_normalize_base2k(
self.ptr,
basek as u64,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
tmp_bytes.as_mut_ptr(),
);
}
}
fn vec_znx_big_automorphism<R, A>(&self, k: i64, res: &mut R, res_col: usize, a: &A, a_col: usize)
where
R: VecZnxBigToMut<FFT64>,
A: VecZnxBigToRef<FFT64>,
{
let a: VecZnxBig<&[u8], FFT64> = a.to_ref();
let mut res: VecZnxBig<&mut [u8], FFT64> = res.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
assert_eq!(res.n(), self.n());
}
unsafe {
vec_znx::vec_znx_automorphism(
self.ptr,
k,
res.at_mut_ptr(res_col, 0),
res.size() as u64,
res.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
)
}
}
fn vec_znx_big_automorphism_inplace<A>(&self, k: i64, a: &mut A, a_col: usize)
where
A: VecZnxBigToMut<FFT64>,
{
let mut a: VecZnxBig<&mut [u8], FFT64> = a.to_mut();
#[cfg(debug_assertions)]
{
assert_eq!(a.n(), self.n());
}
unsafe {
vec_znx::vec_znx_automorphism(
self.ptr,
k,
a.at_mut_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
a.at_ptr(a_col, 0),
a.size() as u64,
a.sl() as u64,
)
}
}
}
impl<B: Backend> VecZnxBigScratch for Module<B> {
fn vec_znx_big_normalize_tmp_bytes(&self) -> usize {
<Self as VecZnxScratch>::vec_znx_normalize_tmp_bytes(self)
}
}
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