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Update bit encoding to byte interleaving to enable trivial byte-level manipulation

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This commit is contained in:
Pro7ech
2025-10-29 10:05:44 +01:00
parent c761d2cae0
commit 9d5bc43632
7 changed files with 72 additions and 41 deletions
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35
poulpy-schemes/src/tfhe/bdd_arithmetic/mod.rs
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@@ -15,23 +15,46 @@ pub use key::*;
pub mod tests;
pub trait UnsignedInteger: Copy + 'static {
const WORD_SIZE: usize;
const BITS: u32;
const LOG_BITS: u32;
const LOG_BYTES: u32;
const LOG_BYTES_MASK: usize;
#[inline(always)]
fn bit_index(i: usize) -> usize {
((i & Self::LOG_BYTES_MASK) << 3) | (i >> Self::LOG_BYTES)
}
}
impl UnsignedInteger for u8 {
const WORD_SIZE: usize = 8;
const BITS: u32 = u8::BITS;
const LOG_BITS: u32 = (u32::BITS - (Self::BITS - 1).leading_zeros());
const LOG_BYTES: u32 = Self::LOG_BITS - 3;
const LOG_BYTES_MASK: usize = (1 << Self::LOG_BYTES) - 1;
}
impl UnsignedInteger for u16 {
const WORD_SIZE: usize = 16;
const BITS: u32 = u16::BITS;
const LOG_BITS: u32 = (u32::BITS - (Self::BITS - 1).leading_zeros());
const LOG_BYTES: u32 = Self::LOG_BITS - 3;
const LOG_BYTES_MASK: usize = (1 << Self::LOG_BYTES) - 1;
}
impl UnsignedInteger for u32 {
const WORD_SIZE: usize = 32;
const BITS: u32 = u32::BITS;
const LOG_BITS: u32 = (u32::BITS - (Self::BITS - 1).leading_zeros());
const LOG_BYTES: u32 = Self::LOG_BITS - 3;
const LOG_BYTES_MASK: usize = (1 << Self::LOG_BYTES) - 1;
}
impl UnsignedInteger for u64 {
const WORD_SIZE: usize = 64;
const BITS: u32 = u64::BITS;
const LOG_BITS: u32 = (u32::BITS - (Self::BITS - 1).leading_zeros());
const LOG_BYTES: u32 = Self::LOG_BITS >> 3;
const LOG_BYTES_MASK: usize = (1 << Self::LOG_BYTES) - 1;
}
impl UnsignedInteger for u128 {
const WORD_SIZE: usize = 128;
const BITS: u32 = u128::BITS;
const LOG_BITS: u32 = (u32::BITS - (Self::BITS - 1).leading_zeros());
const LOG_BYTES: u32 = Self::LOG_BITS >> 3;
const LOG_BYTES_MASK: usize = (1 << Self::LOG_BYTES) - 1;
}
pub trait ToBits {