blob: a5872f28c14eb2fd9ffa29228bf27c4a921e8557 [file] [log] [blame]
// Copyright 2019 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.
#pragma once
#include <gtest/gtest.h>
#include <algorithm>
#include <chrono>
#include <cstddef>
#include <cstdlib>
#include <functional>
#include <random>
#include <vector>
#include <xnnpack.h>
#include <xnnpack/params.h>
class VScaleExpMinusMaxMicrokernelTester {
public:
inline VScaleExpMinusMaxMicrokernelTester& elements(size_t elements) {
assert(elements != 0);
this->elements_ = elements;
return *this;
}
inline size_t elements() const {
return this->elements_;
}
inline VScaleExpMinusMaxMicrokernelTester& scale(float scale) {
assert(std::isfinite(scale));
assert(scale > 0);
this->scale_ = scale;
return *this;
}
inline float scale() const {
return this->scale_;
}
inline VScaleExpMinusMaxMicrokernelTester& iterations(size_t iterations) {
this->iterations_ = iterations;
return *this;
}
inline size_t iterations() const {
return this->iterations_;
}
void Test(xnn_f32_vscaleexpminusmax_ukernel_function vscaleexpminusmax) const {
std::random_device random_device;
auto rng = std::mt19937(random_device());
// Choose such range that expf(x[i]) overflows, but expf(x[i] - x_max) doesn't.
// However, the range is still narrow enough that double-precision exp doesn't overflow.
auto f32rng = std::bind(std::uniform_real_distribution<float>(90.0f, 100.0f), rng);
std::vector<float> x(elements() + XNN_EXTRA_BYTES / sizeof(float));
std::vector<float> y(elements());
std::vector<double> y_ref(elements());
for (size_t iteration = 0; iteration < iterations(); iteration++) {
std::generate(x.begin(), x.end(), std::ref(f32rng));
// Compute reference results.
const float x_max = *std::max_element(x.begin(), x.begin() + elements());
for (size_t i = 0; i < elements(); i++) {
y_ref[i] = double(scale()) * exp(double(x[i]) - double(x_max));
}
// Call optimized micro-kernel.
vscaleexpminusmax(elements() * sizeof(float), x.data(), y.data(), scale(), x_max);
// Verify results.
for (size_t i = 0; i < elements(); i++) {
ASSERT_NEAR(y_ref[i], y[i], std::abs(y_ref[i]) * 1.0e-6)
<< "elements = " << elements() << ", scale = " << scale() << ", x_max = " << x_max;
}
}
}
private:
size_t elements_{1};
float scale_{1.0f};
size_t iterations_{15};
};