Function halo2_gadgets::utilities::decompose_word

source · [−]

pub fn decompose_word<F: PrimeFieldBits>(
    word: &F, 
    word_num_bits: usize, 
    window_num_bits: usize
) -> Vec<u8>ⓘNotable traits for Vec<u8, A>impl<A> Write for Vec<u8, A> where
    A: Allocator,

Expand description

Decompose a word alpha into window_num_bits bits (little-endian) For a window size of w, this returns [k_0, …, k_n] where each k_i is a w-bit value, and scalar = k_0 + k_1 * w + k_n * w^n.

Panics

We are returning a Vec<u8> which means the window size is limited to <= 8 bits.