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214 lines
7.3 KiB
214 lines
7.3 KiB
// Copyright 2019 Google LLC
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//
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree.
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#pragma once
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#include <gtest/gtest.h>
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#include <algorithm>
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#include <cassert>
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#include <cmath>
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#include <cstddef>
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#include <cstdint>
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#include <functional>
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#include <random>
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#include <vector>
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#include <xnnpack.h>
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#include <xnnpack/AlignedAllocator.h>
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#include <xnnpack/params.h>
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class IBilinearMicrokernelTester {
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public:
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inline IBilinearMicrokernelTester& pixels(uint32_t pixels) {
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assert(pixels >= 1);
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this->pixels_ = pixels;
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return *this;
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}
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inline uint32_t pixels() const {
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return this->pixels_;
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}
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inline IBilinearMicrokernelTester& channels(uint32_t channels) {
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assert(channels >= 1);
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this->channels_ = channels;
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return *this;
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}
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inline uint32_t channels() const {
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return this->channels_;
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}
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inline IBilinearMicrokernelTester& input_offset(uint32_t input_offset) {
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this->input_offset_ = input_offset;
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return *this;
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}
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inline uint32_t input_offset() const {
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return this->input_offset_;
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}
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inline IBilinearMicrokernelTester& output_stride(uint32_t output_stride) {
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assert(output_stride != 0);
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this->output_stride_ = output_stride;
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return *this;
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}
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inline uint32_t output_stride() const {
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if (this->output_stride_ == 0) {
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return channels();
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} else {
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assert(this->output_stride_ >= channels());
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return this->output_stride_;
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}
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}
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inline IBilinearMicrokernelTester& iterations(size_t iterations) {
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this->iterations_ = iterations;
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return *this;
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}
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inline size_t iterations() const {
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return this->iterations_;
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}
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inline IBilinearMicrokernelTester& input_stride(uint32_t input_stride) {
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assert(input_stride != 0);
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this->input_stride_ = input_stride;
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return *this;
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}
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inline uint32_t input_stride() const {
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if (this->input_stride_ == 0) {
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return 4 * pixels();
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} else {
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assert(this->input_stride_ >= 4 * pixels());
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return this->input_stride_;
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}
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}
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void Test(xnn_f32_ibilinear_ukernel_function ibilinear) const {
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std::random_device random_device;
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auto rng = std::mt19937(random_device());
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auto f32rng = std::bind(std::uniform_real_distribution<float>(0.0f, 1.0f), rng);
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std::vector<const float*> indirection(pixels() * 4);
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std::vector<float> input(XNN_EXTRA_BYTES / sizeof(float) + indirection.size() * channels());
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std::vector<float, AlignedAllocator<float, 64>> packed_weights(pixels() * 2);
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std::vector<float> output((pixels() - 1) * output_stride() + channels());
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std::vector<float> output_ref(pixels() * channels());
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for (size_t iteration = 0; iteration < iterations(); iteration++) {
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std::generate(input.begin(), input.end(), std::ref(f32rng));
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std::generate(packed_weights.begin(), packed_weights.end(), std::ref(f32rng));
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std::fill(output.begin(), output.end(), nanf(""));
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for (size_t i = 0; i < indirection.size(); i++) {
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indirection[i] = input.data() + i * channels() - input_offset();
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}
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std::shuffle(indirection.begin(), indirection.end(), rng);
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// Compute reference results.
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for (size_t i = 0; i < pixels(); i++) {
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for (size_t c = 0; c < channels(); c++) {
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const float alpha_h = packed_weights[i * 2 + 0];
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const float alpha_v = packed_weights[i * 2 + 1];
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output_ref[i * channels() + c] =
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indirection[i * 4 + 0][c + input_offset()] * (1.0f - alpha_h) * (1.0f - alpha_v) +
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indirection[i * 4 + 1][c + input_offset()] * alpha_h * (1.0f - alpha_v) +
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indirection[i * 4 + 2][c + input_offset()] * (1.0f - alpha_h) * alpha_v +
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indirection[i * 4 + 3][c + input_offset()] * alpha_h * alpha_v;
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}
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}
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// Call optimized micro-kernel.
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ibilinear(
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pixels(), channels() * sizeof(float),
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indirection.data(), input_offset() * sizeof(float),
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packed_weights.data(), output.data(),
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(output_stride() - channels()) * sizeof(float));
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// Verify results.
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for (size_t i = 0; i < pixels(); i++) {
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for (size_t c = 0; c < channels(); c++) {
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ASSERT_NEAR(
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output_ref[i * channels() + c],
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output[i * output_stride() + c],
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std::abs(output_ref[i * channels() + c]) * 1.0e-4)
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<< "i = " << i << ", channel = " << c;
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}
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}
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}
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}
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void TestCHW(xnn_f32_ibilinear_chw_ukernel_function ibilinear) const {
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std::random_device random_device;
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auto rng = std::mt19937(random_device());
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auto f32rng = std::bind(std::uniform_real_distribution<float>(0.0f, 1.0f), rng);
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std::vector<const float*> indirection(pixels() * 2);
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std::vector<float> input(XNN_EXTRA_BYTES / sizeof(float) + (channels() - 1) * input_stride() + 4 * pixels());
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std::vector<float, AlignedAllocator<float, 64>> packed_weights(pixels() * 2);
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std::vector<float> output(pixels() * channels());
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std::vector<float> output_ref(pixels() * channels());
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for (size_t iteration = 0; iteration < iterations(); iteration++) {
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std::generate(input.begin(), input.end(), std::ref(f32rng));
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std::generate(packed_weights.begin(), packed_weights.end(), std::ref(f32rng));
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std::fill(output.begin(), output.end(), nanf(""));
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// Indirection will point to the even ("left") pixels of the input.
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// The kernels will expect "right" pixels to be placed right next to them.
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for (size_t i = 0; i < indirection.size(); i++) {
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const float* left_corner = input.data() + 2 * i - input_offset();
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indirection[i] = left_corner;
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}
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std::shuffle(indirection.begin(), indirection.end(), rng);
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// Compute reference results.
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for (size_t i = 0; i < pixels(); i++) {
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for (size_t c = 0; c < channels(); c++) {
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const float alpha_h = packed_weights[i * 2 + 0];
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const float alpha_v = packed_weights[i * 2 + 1];
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// `c * pixels() + i` because the output is NCHW.
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output_ref[c * pixels() + i] =
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// `c * indirection.size()` because the input is NCHW.
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(indirection[i * 2 + 0] + 0)[c * input_stride() + input_offset()] * (1.0f - alpha_h) * (1.0f - alpha_v) +
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(indirection[i * 2 + 0] + 1)[c * input_stride() + input_offset()] * alpha_h * (1.0f - alpha_v) +
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(indirection[i * 2 + 1] + 0)[c * input_stride() + input_offset()] * (1.0f - alpha_h) * alpha_v +
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(indirection[i * 2 + 1] + 1)[c * input_stride() + input_offset()] * alpha_h * alpha_v;
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}
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}
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// Call optimized micro-kernel.
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ibilinear(
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pixels(), channels(),
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indirection.data(), input_offset() * sizeof(float),
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packed_weights.data(), output.data(), input_stride() * sizeof(float));
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// Verify results.
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for (size_t c = 0; c < channels(); c++) {
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for (size_t i = 0; i < pixels(); i++) {
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ASSERT_NEAR(
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output_ref[c * pixels() + i],
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output[c * pixels() + i],
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std::abs(output_ref[c * pixels() + i]) * 1.0e-4)
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<< "i = " << i << ", channel = " << c;
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}
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}
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}
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}
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private:
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uint32_t channels_{1};
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uint32_t pixels_{1};
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uint32_t output_stride_{0};
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uint32_t input_stride_{0};
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uint32_t input_offset_{0};
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size_t iterations_{3};
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};
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