1 files changed, 122 insertions, 0 deletions
diff --git a/third_party/aom/test/av1_softmax_test.cc b/third_party/aom/test/av1_softmax_test.cc
new file mode 100644
index 0000000000..2b04af1342
--- /dev/null
+++ b/third_party/aom/test/av1_softmax_test.cc
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2021, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <memory>
+#include <new>
+#include <tuple>
+
+#include "aom/aom_integer.h"
+#include "aom_ports/aom_timer.h"
+#include "av1/encoder/ml.h"
+#include "config/aom_config.h"
+#include "config/aom_dsp_rtcd.h"
+#include "config/av1_rtcd.h"
+#include "test/acm_random.h"
+#include "test/register_state_check.h"
+#include "test/util.h"
+#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
+
+namespace {
+using FastSoftmaxFn = void (*)(const float *const input, float *output);
+using FastSoftmaxTestParams = std::tuple<const FastSoftmaxFn, int>;
+
+// Error thresholds for functional equivalence
+constexpr float kRelEpsilon = 5e-2f;
+constexpr float kAbsEpsilon = 5e-3f;
+
+class FastSoftmaxTest : public ::testing::TestWithParam<FastSoftmaxTestParams> {
+ public:
+  FastSoftmaxTest() : target_fn_(GET_PARAM(0)), num_classes_(GET_PARAM(1)) {}
+  void SetUp() override {
+    ref_buf_.reset(new (std::nothrow) float[num_classes_]());
+    ASSERT_NE(ref_buf_, nullptr);
+    dst_buf_.reset(new (std::nothrow) float[num_classes_]());
+    ASSERT_NE(dst_buf_, nullptr);
+    input_.reset(new (std::nothrow) float[num_classes_]());
+    ASSERT_NE(input_, nullptr);
+  }
+  void RunSoftmaxTest();
+  void RunSoftmaxSpeedTest(const int run_times);
+  void FillInputBuf();
+
+ private:
+  const FastSoftmaxFn target_fn_;
+  const int num_classes_;
+  std::unique_ptr<float[]> ref_buf_, dst_buf_, input_;
+  libaom_test::ACMRandom rng_;
+};
+
+void FastSoftmaxTest::FillInputBuf() {
+  for (int idx = 0; idx < num_classes_; idx++) {
+    input_[idx] = ((float)rng_.Rand31() - (1 << 30)) / (1u << 30);
+  }
+}
+
+void FastSoftmaxTest::RunSoftmaxTest() {
+  av1_nn_softmax(input_.get(), ref_buf_.get(), num_classes_);
+  target_fn_(input_.get(), dst_buf_.get());
+
+  for (int idx = 0; idx < num_classes_; idx++) {
+    if (ref_buf_[idx] < kAbsEpsilon) {
+      ASSERT_LE(dst_buf_[idx], kAbsEpsilon)
+          << "Reference output was near-zero, test output was not" << std::endl;
+    } else {
+      const float error = dst_buf_[idx] - ref_buf_[idx];
+      const float relative_error = fabsf(error / ref_buf_[idx]);
+      ASSERT_LE(relative_error, kRelEpsilon)
+          << "Excessive relative error between reference and test output"
+          << std::endl;
+      ASSERT_LE(error, kAbsEpsilon)
+          << "Excessive absolute error between reference and test output"
+          << std::endl;
+    }
+  }
+}
+
+void FastSoftmaxTest::RunSoftmaxSpeedTest(const int run_times) {
+  aom_usec_timer timer;
+  aom_usec_timer_start(&timer);
+  for (int idx = 0; idx < run_times; idx++) {
+    target_fn_(input_.get(), dst_buf_.get());
+  }
+  aom_usec_timer_mark(&timer);
+  const int64_t time = aom_usec_timer_elapsed(&timer);
+  std::cout << "Test with " << num_classes_ << " classes took " << time
+            << " us." << std::endl;
+}
+
+TEST_P(FastSoftmaxTest, RandomValues) {
+  FillInputBuf();
+  RunSoftmaxTest();
+}
+
+TEST_P(FastSoftmaxTest, DISABLED_Speed) {
+  constexpr int kNumTimes = 1000000;
+  RunSoftmaxSpeedTest(kNumTimes);
+}
+
+void AnchorSoftmax16Fn(const float *input, float *output) {
+  av1_nn_softmax(input, output, 16);
+}
+
+const FastSoftmaxTestParams kArrayParams_c[] = {
+  FastSoftmaxTestParams(AnchorSoftmax16Fn, 16),
+  FastSoftmaxTestParams(av1_nn_fast_softmax_16_c, 16)
+};
+INSTANTIATE_TEST_SUITE_P(C, FastSoftmaxTest,
+                         ::testing::ValuesIn(kArrayParams_c));
+
+#if HAVE_SSE3 && !CONFIG_EXCLUDE_SIMD_MISMATCH
+INSTANTIATE_TEST_SUITE_P(
+    SSE3, FastSoftmaxTest,
+    ::testing::Values(FastSoftmaxTestParams(av1_nn_fast_softmax_16_sse3, 16)));
+#endif
+}  // namespace