Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 1 | // Copyright 2019 Google LLC |
| 2 | // |
| 3 | // This source code is licensed under the BSD-style license found in the |
| 4 | // LICENSE file in the root directory of this source tree. |
| 5 | |
| 6 | #pragma once |
| 7 | |
| 8 | #include <gtest/gtest.h> |
| 9 | |
| 10 | #include <algorithm> |
| 11 | #include <chrono> |
| 12 | #include <cstddef> |
| 13 | #include <cstdlib> |
| 14 | #include <functional> |
| 15 | #include <random> |
| 16 | #include <vector> |
| 17 | |
| 18 | #include <xnnpack.h> |
| 19 | #include <xnnpack/params.h> |
| 20 | |
| 21 | |
| 22 | class VScaleExtExpMicrokernelTester { |
| 23 | public: |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 24 | inline VScaleExtExpMicrokernelTester& elements(size_t elements) { |
| 25 | assert(elements != 0); |
| 26 | this->elements_ = elements; |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 27 | return *this; |
| 28 | } |
| 29 | |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 30 | inline size_t elements() const { |
| 31 | return this->elements_; |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 32 | } |
| 33 | |
| 34 | inline VScaleExtExpMicrokernelTester& iterations(size_t iterations) { |
| 35 | this->iterations_ = iterations; |
| 36 | return *this; |
| 37 | } |
| 38 | |
| 39 | inline size_t iterations() const { |
| 40 | return this->iterations_; |
| 41 | } |
| 42 | |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 43 | void Test(xnn_f32_vscaleextexp_ukernel_function vscaleextexp) const { |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 44 | std::random_device random_device; |
| 45 | auto rng = std::mt19937(random_device()); |
| 46 | // Choose such range that expf(x[i]) overflows, but double-precision exp doesn't overflow. |
| 47 | auto f32rng = std::bind(std::uniform_real_distribution<float>(90.0f, 100.0f), rng); |
| 48 | |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 49 | std::vector<float> x(elements() + XNN_EXTRA_BYTES / sizeof(float)); |
| 50 | std::vector<float> y(elements()); |
| 51 | std::vector<double> y_ref(elements()); |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 52 | for (size_t iteration = 0; iteration < iterations(); iteration++) { |
| 53 | std::generate(x.begin(), x.end(), std::ref(f32rng)); |
| 54 | |
| 55 | // Compute scale parameters. |
| 56 | double sum = 0.0; |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 57 | for (size_t i = 0; i < elements(); i++) { |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 58 | sum += std::exp(double(x[i])); |
| 59 | } |
| 60 | int sum_exponent; |
| 61 | const double sum_mantissa = std::frexp(sum, &sum_exponent); |
| 62 | const float scale_mantissa = float(1.0 / sum_mantissa); |
| 63 | const float scale_exponent = -float(sum_exponent); |
| 64 | |
| 65 | // Compute reference results. |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 66 | for (size_t i = 0; i < elements(); i++) { |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 67 | y_ref[i] = std::exp(double(x[i])) / sum; |
| 68 | } |
| 69 | |
| 70 | // Call optimized micro-kernel. |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 71 | vscaleextexp(elements() * sizeof(float), x.data(), y.data(), scale_mantissa, scale_exponent); |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 72 | |
| 73 | // Verify results. |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 74 | for (size_t i = 0; i < elements(); i++) { |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 75 | ASSERT_NEAR(y_ref[i], y[i], std::abs(y_ref[i]) * 1.0e-6) |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 76 | << "elements = " << elements() << ", scale:mantissa = " << scale_mantissa << ", scale:exponent = " << scale_exponent; |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 77 | } |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | private: |
Marat Dukhan | 4c4eb00 | 2019-12-08 21:27:49 -0800 | [diff] [blame] | 82 | size_t elements_{1}; |
Marat Dukhan | 6f8d4d3 | 2019-10-25 17:07:09 -0700 | [diff] [blame] | 83 | size_t iterations_{15}; |
| 84 | }; |