chore: import upstream snapshot with attribution

2026-07-13 13:33:03 +08:00
commit 5b57521aa1
8226 changed files with 3425766 additions and 0 deletions
@@ -0,0 +1,42 @@
+//
+//  CPUElu.cpp
+//  MNN
+//
+//  Created by MNN on 2019/09/23.
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#include <cmath>
+#include "backend/cpu/CPUElu.hpp"
+#include "backend/cpu/CPUBackend.hpp"
+
+namespace MNN {
+ErrorCode CPUElu::onExecute(const std::vector<Tensor*>& inputs, const std::vector<Tensor*>& outputs) {
+    auto input = inputs[0];
+    auto output = outputs[0];
+
+    const float* srcData = input->host<float>();
+    float* dstData = output->host<float>();
+    const int size = input->elementSize();
+
+    for (int i = 0; i < size; ++i) {
+        if (srcData[i] >= 0) {
+            dstData[i] = srcData[i];
+        } else {
+            dstData[i] = mAlpha * (expf(srcData[i]) - 1);
+        }
+    }
+
+    return NO_ERROR;
+}
+
+class CPUEluCreator : public CPUBackend::Creator {
+public:
+    virtual Execution* onCreate(const std::vector<Tensor*>& inputs, const std::vector<Tensor*>& outputs,
+                                const MNN::Op* op, Backend* backend) const {
+        return new CPUElu(backend, op->main_as_ELU()->alpha());
+    }
+};
+
+REGISTER_CPU_OP_CREATOR(CPUEluCreator, OpType_ELU);
+} // namespace MNN