chore: import upstream snapshot with attribution

paddle/phi/kernels/legacy/gpu/fp8_quant_blockwise_kernel.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2025 PaddlePaddle Authors. 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.
+
+#pragma once
+
+#include "paddle/phi/core/dense_tensor.h"
+#include "paddle/phi/core/kernel_registry.h"
+
+namespace phi {
+
+template <typename T, typename Context>
+void FP8QuantBlockWiseKernel(const Context& dev_ctx,
+                             const DenseTensor& X,
+                             float epsilon,
+                             bool using_1x128_vec_quant,
+                             bool input_transpose,
+                             bool output_scale_transpose,
+                             bool return_transpose_only,
+                             bool using_e5m2,
+                             bool using_pow2_scale,
+                             bool use_ue8m0,
+                             DenseTensor* out,
+                             DenseTensor* scale,
+                             DenseTensor* out_transposed,
+                             DenseTensor* scale_transposed);
+
+}  // namespace phi