[Kernel] Add w8a8 CUTLASS kernels (#4749)

csrc/quantization/cutlass_w8a8/common.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+#include "cutlass/cutlass.h"
+
+/**
+ * Helper function for checking CUTLASS errors
+ */
+#define CUTLASS_CHECK(status)                        \
+  {                                                  \
+    TORCH_CHECK(status == cutlass::Status::kSuccess, \
+                cutlassGetStatusString(status))      \
+  }