ROCm: sgl-kernel enablement starting with sgl_moe_align_block (#3287)

sgl-kernel/src/sgl-kernel/torch_extension_rocm.cc

@@ -0,0 +1,29 @@
+/* Copyright 2025 SGLang Team. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+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.
+==============================================================================*/
+
+#include <ATen/core/dispatch/Dispatcher.h>
+#include <torch/library.h>
+
+#include "sgl_kernels_ops.h"
+
+TORCH_LIBRARY_EXPAND(sgl_kernels, m) {
+  // moe_align_block_size
+  m.def(
+      "moe_align_block_size(Tensor topk_ids, int num_experts, int block_size, Tensor! sorted_token_ids, Tensor! "
+      "experts_ids, Tensor! num_tokens_post_pad, Tensor! token_cnts_buffer, Tensor! cumsum_buffer) -> ()");
+  m.impl("moe_align_block_size", torch::kCUDA, &moe_align_block_size);
+}
+
+REGISTER_EXTENSION(_kernels)