Add RVV 1.0 compatible shuffle channel implementation for RISCV

Co-authored-by: nihui <171016+nihui@users.noreply.github.com>

src/layer/riscv/shufflechannel_riscv.h

@@ -0,0 +1,35 @@
+// Xavier Hsinyuan is pleased to support the open source community by making ncnn available.
+//
+// Copyright (C) 2023 Xavier Hsinyuan <me@lstlx.com>. All rights reserved.
+//
+// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// https://opensource.org/licenses/BSD-3-Clause
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+#ifndef LAYER_SHUFFLECHANNEL_RISCV_H
+#define LAYER_SHUFFLECHANNEL_RISCV_H
+
+#include "shufflechannel.h"
+
+namespace ncnn {
+
+class ShuffleChannel_riscv : virtual public ShuffleChannel
+{
+public:
+    ShuffleChannel_riscv();
+
+    virtual int forward(const Mat& bottom_blob, Mat& top_blob, const Option& opt) const;
+
+protected:
+    int forward_bf16s_fp16s(const Mat& bottom_blob, Mat& top_blob, const Option& opt) const;
+};
+
+} // namespace ncnn
+
+#endif // LAYER_SHUFFLECHANNEL_RISCV_H