[NFC] polish colossalai/kernel/cuda_native/csrc/moe_cuda.cpp code style (#642)

colossalai/kernel/cuda_native/csrc/moe_cuda.cpp

 #include <torch/extension.h>
 
-
-torch::Tensor moe_dispatch_cuda_forward(
-    int s, int ec, int h,
-    torch::Tensor batch_tokens,
-    torch::Tensor mask,
-    torch::Tensor dest_idx);
-
-torch::Tensor moe_dispatch_cuda_backward(
-    int s, int ec, int h,
-    torch::Tensor expert_grad,
-    torch::Tensor mask,
-    torch::Tensor dest_idx);
-
-torch::Tensor moe_combine_cuda_forward(
-    int s, int e, int c, int h,
-    torch::Tensor expert_tokens,
-    torch::Tensor logits,
-    torch::Tensor mask,
-    torch::Tensor dest_idx);
-
-std::vector<torch::Tensor> moe_combine_cuda_backward(
-    int s, int e, int c, int h,
-    torch::Tensor tokens_grad,
-    torch::Tensor expert_tokens,
-    torch::Tensor logits,
-    torch::Tensor mask,
-    torch::Tensor dest_idx);
+torch::Tensor moe_dispatch_cuda_forward(int s, int ec, int h,
+                                        torch::Tensor batch_tokens,
+                                        torch::Tensor mask,
+                                        torch::Tensor dest_idx);
+
+torch::Tensor moe_dispatch_cuda_backward(int s, int ec, int h,
+                                         torch::Tensor expert_grad,
+                                         torch::Tensor mask,
+                                         torch::Tensor dest_idx);
+
+torch::Tensor moe_combine_cuda_forward(int s, int e, int c, int h,
+                                       torch::Tensor expert_tokens,
+                                       torch::Tensor logits, torch::Tensor mask,
+                                       torch::Tensor dest_idx);
+
+std::vector<torch::Tensor>
+moe_combine_cuda_backward(int s, int e, int c, int h, torch::Tensor tokens_grad,
+                          torch::Tensor expert_tokens, torch::Tensor logits,
+                          torch::Tensor mask, torch::Tensor dest_idx);
 
 torch::Tensor cumsum_sub_one_in_dim0(torch::Tensor mask);
 
-#define CHECK_CUDA(x) TORCH_CHECK(x.device().is_cuda(), #x " must be a CUDA tensor")
-#define CHECK_CONTIGUOUS(x) TORCH_CHECK(x.is_contiguous(), #x " must be contiguous")
-#define CHECK_INPUT(x) CHECK_CUDA(x); CHECK_CONTIGUOUS(x)
+#define CHECK_CUDA(x)                                                          \
+  TORCH_CHECK(x.device().is_cuda(), #x " must be a CUDA tensor")
+#define CHECK_CONTIGUOUS(x)                                                    \
+  TORCH_CHECK(x.is_contiguous(), #x " must be contiguous")
+#define CHECK_INPUT(x)                                                         \
+  CHECK_CUDA(x);                                                               \
+  CHECK_CONTIGUOUS(x)
 
-torch::Tensor moe_dispatch_forward(
-    int s, int ec, int h,
-    torch::Tensor batch_tokens,
-    torch::Tensor mask,
-    torch::Tensor dest_idx) {
+torch::Tensor moe_dispatch_forward(int s, int ec, int h,
+                                   torch::Tensor batch_tokens,
+                                   torch::Tensor mask, torch::Tensor dest_idx) {
 
-    CHECK_INPUT(batch_tokens);
-    CHECK_CUDA(mask);
-    CHECK_CUDA(dest_idx);
+  CHECK_INPUT(batch_tokens);
+  CHECK_CUDA(mask);
+  CHECK_CUDA(dest_idx);
 
-    return moe_dispatch_cuda_forward(
-        s, ec, h,
-        batch_tokens, mask, dest_idx);
+  return moe_dispatch_cuda_forward(s, ec, h, batch_tokens, mask, dest_idx);
 }
 
-torch::Tensor moe_dispatch_backward(
-    int s, int ec, int h,
-    torch::Tensor expert_grad,
-    torch::Tensor mask,
-    torch::Tensor dest_idx) {
+torch::Tensor moe_dispatch_backward(int s, int ec, int h,
+                                    torch::Tensor expert_grad,
+                                    torch::Tensor mask,
+                                    torch::Tensor dest_idx) {
 
-    CHECK_INPUT(expert_grad);
-    CHECK_CUDA(mask);
-    CHECK_CUDA(dest_idx);
+  CHECK_INPUT(expert_grad);
+  CHECK_CUDA(mask);
+  CHECK_CUDA(dest_idx);
 
-    return moe_dispatch_cuda_backward(
-        s, ec, h,
-        expert_grad, mask, dest_idx);
+  return moe_dispatch_cuda_backward(s, ec, h, expert_grad, mask, dest_idx);
 }
 
-torch::Tensor moe_combine_forward(
-    int s, int e, int c, int h,
-    torch::Tensor expert_tokens,
-    torch::Tensor logits,
-    torch::Tensor mask,
-    torch::Tensor dest_idx) {
-
-    CHECK_INPUT(expert_tokens);
-    CHECK_INPUT(logits);
-    CHECK_CUDA(mask);
-    CHECK_CUDA(dest_idx);
-
-    return moe_combine_cuda_forward(
-        s, e, c, h,
-        expert_tokens, logits, mask, dest_idx);
+torch::Tensor moe_combine_forward(int s, int e, int c, int h,
+                                  torch::Tensor expert_tokens,
+                                  torch::Tensor logits, torch::Tensor mask,
+                                  torch::Tensor dest_idx) {
+
+  CHECK_INPUT(expert_tokens);
+  CHECK_INPUT(logits);
+  CHECK_CUDA(mask);
+  CHECK_CUDA(dest_idx);
+
+  return moe_combine_cuda_forward(s, e, c, h, expert_tokens, logits, mask,
+                                  dest_idx);
 }
 
-std::vector<torch::Tensor> moe_combine_backward(
-    int s, int e, int c, int h,
-    torch::Tensor tokens_grad,
-    torch::Tensor expert_tokens,
-    torch::Tensor logits,
-    torch::Tensor mask,
-    torch::Tensor dest_idx) {
-
-    CHECK_INPUT(tokens_grad);
-    CHECK_INPUT(logits);
-    CHECK_CUDA(mask);
-    CHECK_CUDA(dest_idx);
-
-    return moe_combine_cuda_backward(
-        s, e, c, h,
-        tokens_grad, expert_tokens, logits, mask, dest_idx);
+std::vector<torch::Tensor>
+moe_combine_backward(int s, int e, int c, int h, torch::Tensor tokens_grad,
+                     torch::Tensor expert_tokens, torch::Tensor logits,
+                     torch::Tensor mask, torch::Tensor dest_idx) {
+
+  CHECK_INPUT(tokens_grad);
+  CHECK_INPUT(logits);
+  CHECK_CUDA(mask);
+  CHECK_CUDA(dest_idx);
+
+  return moe_combine_cuda_backward(s, e, c, h, tokens_grad, expert_tokens,
+                                   logits, mask, dest_idx);
 }
 
 torch::Tensor moe_cumsum(torch::Tensor mask) {
-    CHECK_INPUT(mask);
-    return cumsum_sub_one_in_dim0(mask);
+  CHECK_INPUT(mask);
+  return cumsum_sub_one_in_dim0(mask);
 }
 
 PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
-    m.def("cumsum_sub_one", &moe_cumsum,
-        "Fast cumsum operation in dim0");
-    m.def("dispatch_forward", &moe_dispatch_forward, 
+  m.def("cumsum_sub_one", &moe_cumsum, "Fast cumsum operation in dim0");
+  m.def("dispatch_forward", &moe_dispatch_forward,
         "Forward operation in MoE dispatch function");
-    m.def("dispatch_backward", &moe_dispatch_backward,
+  m.def("dispatch_backward", &moe_dispatch_backward,
         "Backward operation in MoE dispatch function");
-    m.def("combine_forward", &moe_combine_forward,
+  m.def("combine_forward", &moe_combine_forward,
         "Combine operation in MoE combine function");
-    m.def("combine_backward", &moe_combine_backward,
+  m.def("combine_backward", &moe_combine_backward,
         "Combine operation in MoE combine function");
 }