[Eager] Add eager mode POC

Author: YWHyuk

PyTorchSimDevice/csrc/aten/OpenRegMinimal.cpp

@@ -158,12 +158,4 @@ TORCH_LIBRARY_IMPL(_, PrivateUse1, m) {
 }
 // LITERALINCLUDE END: FALLBACK GLOBAL
 
-// LITERALINCLUDE START: FALLBACK SINGLE
-TORCH_LIBRARY_IMPL(aten, PrivateUse1, m) {
-  m.impl(
-      "sub.Tensor",
-      torch::CppFunction::makeFromBoxedFunction<&wrapper_cpu_fallback>());
-}
-// LITERALINCLUDE END: FALLBACK SINGLE
-
 } // namespace at::openreg

tests/test_eager.py

@@ -1,8 +1,13 @@
 import torch
 
+@torch.library.impl("aten::mul.Tensor", "npu")
+def my_fallback(x, y):
+    raise NotImplementedError("Fallback called")
+
 if __name__ == "__main__":
+    #torch.npu.register_fallback_op("aten::add.out", my_fallback)
     device = torch.device("npu:0")
-    x = torch.zeros(10, 10).to(device)
-    y = torch.zeros(10, 10).to(device)
-    z = x + y
+    x = torch.ones(10, 10).to(device)
+    y = torch.ones(10, 10).to(device)
+    z = x * y
     print(z.cpu())