Function bbq_dequantize

nodedb-vector/src/rerank/codecs/bbq.rs:69–81

(packed: &[u8], residual_norm: f32, dim: usize)

/// `pack_signs`).
#[inline]
fn bbq_dequantize(packed: &[u8], residual_norm: f32, dim: usize) -> Vec<f32> {
    let scale = if dim > 0 {
        residual_norm / (dim as f32).sqrt()
    } else {
        0.0
    };
    (0..dim)
        .map(|i| {
            let bit = (packed[i / 8] >> (7 - (i % 8))) & 1;
            if bit != 0 { scale } else { -scale }
        })
        .collect()
}

// ── BbqRerank ─────────────────────────────────────────────────────────────────