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 +1,51 @@
+//
+//  CPUSelu.cpp
+//  MNN
+//
+//  Created by MNN on 2018/08/05.
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#include "backend/cpu/CPUSelu.hpp"
+#include <math.h>
+#include "backend/cpu/CPUBackend.hpp"
+#include "core/Macro.h"
+
+namespace MNN {
+
+CPUSelu::CPUSelu(Backend *b, const MNN::Op *op) : MNN::Execution(b) {
+    auto selu = op->main_as_Selu();
+    mScale    = selu->scale();
+    mAlpha    = selu->alpha();
+}
+
+ErrorCode CPUSelu::onExecute(const std::vector<Tensor *> &inputs, const std::vector<Tensor *> &outputs) {
+    MNN_ASSERT(1 == inputs.size());
+    MNN_ASSERT(1 == outputs.size());
+    MNN_ASSERT(inputs[0]->buffer().type.bytes() == 4);
+    auto scaleAlpha = mAlpha * mScale;
+    auto ptr        = inputs[0]->host<float>();
+    auto outptr     = outputs[0]->host<float>();
+    int size        = inputs[0]->size() / sizeof(float);
+    for (int i = 0; i < size; i++) {
+        if (ptr[i] < 0.f) {
+            outptr[i] = scaleAlpha * (::expf(ptr[i]) - 1.f);
+        } else {
+            outptr[i] = mScale * ptr[i];
+        }
+    }
+
+    return NO_ERROR;
+}
+
+class CPUSeluCreator : public CPUBackend::Creator {
+public:
+    virtual Execution *onCreate(const std::vector<Tensor *> &inputs, const std::vector<Tensor *> &outputs,
+                                const MNN::Op *op, Backend *backend) const override {
+        return new CPUSelu(backend, op);
+    }
+};
+
+REGISTER_CPU_OP_CREATOR(CPUSeluCreator, OpType_Selu);
+
+} // namespace MNN