[Bugfix][ROCm][Dynamo][DS 3.1][FP8] fix unsupported hasattr call when Dynamo tracing for ROCm device (#31149)

Signed-off-by: zejunchen-zejun <zejun.chen@amd.com>

vllm/_aiter_ops.py

@@ -380,6 +380,31 @@ def _rocm_aiter_gemm_a8w8_fake(
     return Y
 
 
+def _rocm_aiter_triton_gemm_a8w8_blockscale_impl(
+    A: torch.Tensor,
+    B: torch.Tensor,
+    As: torch.Tensor,
+    Bs: torch.Tensor,
+    output_dtype: torch.dtype = torch.float16,
+) -> torch.Tensor:
+    from aiter.ops.triton.gemm_a8w8_blockscale import gemm_a8w8_blockscale
+
+    return gemm_a8w8_blockscale(A, B, As, Bs, dtype=output_dtype)
+
+
+def _rocm_aiter_triton_gemm_a8w8_blockscale_fake(
+    A: torch.Tensor,
+    B: torch.Tensor,
+    As: torch.Tensor,
+    Bs: torch.Tensor,
+    output_dtype: torch.dtype = torch.float16,
+) -> torch.Tensor:
+    m = A.shape[0]
+    n = B.shape[0]
+    Y = torch.empty(m, n, dtype=output_dtype, device=A.device)
+    return Y
+
+
 def _rocm_aiter_gemm_a8w8_blockscale_impl(
     A: torch.Tensor,
     B: torch.Tensor,
@@ -964,6 +989,12 @@ class rocm_aiter_ops:
                 dispatch_key=current_platform.dispatch_key,
             )
 
+            direct_register_custom_op(
+                op_name="rocm_aiter_triton_gemm_a8w8_blockscale",
+                op_func=_rocm_aiter_triton_gemm_a8w8_blockscale_impl,
+                fake_impl=_rocm_aiter_triton_gemm_a8w8_blockscale_fake,
+            )
+
             direct_register_custom_op(
                 op_name="rocm_aiter_gemm_a8w8_blockscale",
                 op_func=_rocm_aiter_gemm_a8w8_blockscale_impl,
@@ -1102,6 +1133,19 @@ class rocm_aiter_ops:
     ) -> torch.Tensor:
         return torch.ops.vllm.rocm_aiter_gemm_a8w8(A, B, As, Bs, bias, output_dtype)
 
+    @staticmethod
+    def triton_gemm_a8w8_blockscale(
+        A: torch.Tensor,
+        B: torch.Tensor,
+        As: torch.Tensor,
+        Bs: torch.Tensor,
+        block_size: list[int],
+        output_dtype: torch.dtype = torch.float16,
+    ) -> torch.Tensor:
+        return torch.ops.vllm.rocm_aiter_triton_gemm_a8w8_blockscale(
+            A, B, As, Bs, output_dtype
+        )
+
     @staticmethod
     def gemm_a8w8_blockscale(
         A: torch.Tensor,
@@ -1373,19 +1417,6 @@ class rocm_aiter_ops:
             config=config,
         )
 
-    @staticmethod
-    def triton_gemm_a8w8_blockscale(
-        A: torch.Tensor,
-        B: torch.Tensor,
-        As: torch.Tensor,
-        Bs: torch.Tensor,
-        block_size: list[int],
-        output_dtype: torch.dtype = torch.float16,
-    ) -> torch.Tensor:
-        from aiter.ops.triton.gemm_a8w8_blockscale import gemm_a8w8_blockscale
-
-        return gemm_a8w8_blockscale(A, B, As, Bs, dtype=output_dtype)
-
     @staticmethod
     def group_fp8_quant(
         input_2d: torch.Tensor,