Function update_error_stats

examples/quantize-stats/quantize-stats.cpp:87–95

Update error statistics given vectors with the before/after result of quantization

// Update error statistics given vectors with the before/after result of quantization
static void update_error_stats(int64_t nelements, const float * input, const float * output, error_stats & stats) {
    for (int64_t i = 0; i < nelements; i++) {
        double diff = input[i] - output[i];
        stats.total_error += diff * diff;
        stats.max_error = fmax(fabs(diff), stats.max_error);
        stats.error_histogram[std::max(std::min((size_t) floor(fabs(diff) / HISTOGRAM_RANGE * HISTOGRAM_BUCKETS), HISTOGRAM_BUCKETS-1), (size_t) 0)]++;
    }
    stats.num_samples += nelements;
}

static void combine_error_stats(error_stats & into, const error_stats & from) {
    into.num_samples += from.num_samples;