Method encode

nodedb-vector/src/quantize/sq8_codec.rs:51–65

Encode a single FP32 vector into an SQ8 `UnifiedQuantizedVector`. # Panics The `UnifiedQuantizedVector::new` call will only fail if the outlier count mismatches the bitmask, or an outlier dim_index ≥ 64. Neither condition can arise here: `outlier_bitmask` is 0 and `outliers` is empty. The `expect` is therefore unreachable in practice.

(&self, v: &[f32])

    /// condition can arise here: `outlier_bitmask` is 0 and `outliers` is
    /// empty. The `expect` is therefore unreachable in practice.
    fn encode(&self, v: &[f32]) -> Self::Quantized {
        let codes = self.quantize(v);
        let header = QuantHeader {
            quant_mode: QuantMode::Sq8 as u16,
            dim: self.dim as u16,
            global_scale: 0.0,
            residual_norm: 0.0,
            dot_quantized: 0.0,
            outlier_bitmask: 0,
            reserved: [0; 8],
        };
        let uqv = UnifiedQuantizedVector::new(header, &codes, &[])
            .expect("Sq8Codec::encode: layout construction is infallible (no outliers)");
        Sq8Quantized(uqv)
    }

    /// Prepare the FP32 query for asymmetric distance computations.
    ///