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3b5a940355
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/15685 The declaration of "Dequantize" is in "fbsource/fbcode/deeplearning/fbgemm2/QuantUtils.h", so it requires the "namespace fbgemm". <T> is actually optional, since the type can de deduced from the first argument. In some places we have "Dequantize<T>(...)", while in other places we have "Dequantize(...)". We'd better unify them. As a reference, all occurrences of "Quantize" are using "fbgemm::Quantize<T>(...)". Reviewed By: jspark1105 Differential Revision: D13570847 fbshipit-source-id: 7fca9f7f9e4e0d9e5eb27ac44b8707adc3c80717
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
#include <iostream>
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#include <random>
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#include "tanh.h"
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#include <gtest/gtest.h>
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#include "caffe2/core/logging.h"
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using namespace dnnlowp;
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using namespace std;
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TEST(Tanh, TanhUnitTest) {
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// For 8bit, we can go down to 0.0145631
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// For 9bit in 8bit out, we can go down to 0.00976522
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for (double max_abs_err = 0.02; max_abs_err <= 0.1; max_abs_err += 0.01) {
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Tanh<uint8_t> tanh_approx(max_abs_err);
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LOG(INFO) << "max_abs_err " << max_abs_err << " x_pq "
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<< tanh_approx.GetPassRegionEndDequantized() << " x_sq "
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<< tanh_approx.GetSaturationRegionBegin();
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const int NSAMPLES = 1 << 16;
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std::uniform_real_distribution<float> distribution(-5., 5.);
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std::default_random_engine generator;
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float sq_err_sum = 0, max_err = 0;
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for (int i = 0; i < NSAMPLES; ++i) {
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float x = distribution(generator);
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uint8_t x_q = fbgemm::Quantize<uint8_t>(
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x, tanh_approx.GetInputQuantizationParams());
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uint8_t y_q = tanh_approx.Compute(x_q);
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float y = fbgemm::Dequantize<uint8_t>(
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y_q, tanh_approx.GetOutputQuantizationParams());
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float err = fabs(tanh(x) - y);
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sq_err_sum += err * err;
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max_err = std::max(err, max_err);
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if (err > max_abs_err) {
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LOG(INFO) << "x " << x << " tanh_real " << tanh(x) << " tanh_approx "
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<< y << " err " << err << " x_q " << (int)x_q << " y_q "
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<< (int)y_q;
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}
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EXPECT_LE(err, max_abs_err);
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}
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LOG(INFO) << "avg_l2_err " << std::sqrt(sq_err_sum) / NSAMPLES
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<< " max_err " << max_err << endl;
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}
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}
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