From 7f0bdf0787909929e44dbf9a1fc88ade3ca22522 Mon Sep 17 00:00:00 2001
From: zbt78 <1095497213@qq.com>
Date: Mon, 14 Aug 2023 14:30:28 +0800
Subject: [PATCH] write the common functions p_norm_kernel.cu and
 p_norm_grad_kernel.cu to p_norm_utils.h (#56191)

---
 paddle/phi/kernels/funcs/p_norm_utils.h | 63 +++++++++++++++++++++++++
 paddle/phi/kernels/gpu/p_norm_kernel.cu | 41 +---------------
 2 files changed, 64 insertions(+), 40 deletions(-)
 create mode 100644 paddle/phi/kernels/funcs/p_norm_utils.h

diff --git a/paddle/phi/kernels/funcs/p_norm_utils.h b/paddle/phi/kernels/funcs/p_norm_utils.h
new file mode 100644
index 00000000000..b614afa3630
--- /dev/null
+++ b/paddle/phi/kernels/funcs/p_norm_utils.h
@@ -0,0 +1,63 @@
+// Copyright (c) 2022 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
+
+namespace phi {
+__device__ __forceinline__ dtype::float16 inline_abs(dtype::float16 x) {
+  return static_cast<dtype::float16>(abs(static_cast<float>(x)));
+}
+
+__device__ __forceinline__ dtype::bfloat16 inline_abs(dtype::bfloat16 x) {
+  return static_cast<dtype::bfloat16>(abs(static_cast<float>(x)));
+}
+
+__device__ __forceinline__ float inline_abs(float x) { return abs(x); }
+
+__device__ __forceinline__ double inline_abs(double x) { return abs(x); }
+
+template <typename T>
+__device__ __forceinline__ int sgn(T val) {
+  return (T(0) < val) - (val < T(0));
+}
+
+__device__ __forceinline__ int inline_sign(dtype::float16 x) {
+  return sgn<dtype::float16>(x);
+}
+
+__device__ __forceinline__ int inline_sign(dtype::bfloat16 x) {
+  return sgn<dtype::bfloat16>(x);
+}
+
+__device__ __forceinline__ int inline_sign(float x) { return sgn<float>(x); }
+
+__device__ __forceinline__ int inline_sign(double x) { return sgn<double>(x); }
+
+__device__ __forceinline__ dtype::float16 inline_pow(dtype::float16 base,
+                                                     dtype::float16 exponent) {
+  return static_cast<dtype::float16>(
+      pow(static_cast<float>(base), static_cast<float>(exponent)));
+}
+__device__ __forceinline__ dtype::bfloat16 inline_pow(
+    dtype::bfloat16 base, dtype::bfloat16 exponent) {
+  return static_cast<dtype::bfloat16>(
+      pow(static_cast<float>(base), static_cast<float>(exponent)));
+}
+__device__ __forceinline__ float inline_pow(float base, float exponent) {
+  return pow(base, exponent);
+}
+__device__ __forceinline__ double inline_pow(double base, double exponent) {
+  return pow(base, exponent);
+}
+}  // namespace phi
diff --git a/paddle/phi/kernels/gpu/p_norm_kernel.cu b/paddle/phi/kernels/gpu/p_norm_kernel.cu
index 556a6308ff4..cb93772dea1 100644
--- a/paddle/phi/kernels/gpu/p_norm_kernel.cu
+++ b/paddle/phi/kernels/gpu/p_norm_kernel.cu
@@ -17,50 +17,11 @@
 #include "paddle/phi/common/amp_type_traits.h"
 #include "paddle/phi/core/kernel_registry.h"
 #include "paddle/phi/kernels/funcs/elementwise_base.h"
+#include "paddle/phi/kernels/funcs/p_norm_utils.h"
 #include "paddle/phi/kernels/funcs/reduce_function.h"
 #include "paddle/phi/kernels/gpu/reduce.h"
 
 namespace phi {
-
-template <typename T>
-__device__ __forceinline__ int sgn(T val) {
-  return (T(0) < val) - (val < T(0));
-}
-
-__device__ __forceinline__ dtype::float16 inline_abs(dtype::float16 x) {
-  return static_cast<dtype::float16>(abs(static_cast<float>(x)));
-}
-
-__device__ __forceinline__ dtype::bfloat16 inline_abs(dtype::bfloat16 x) {
-  return static_cast<dtype::bfloat16>(abs(static_cast<float>(x)));
-}
-
-__device__ __forceinline__ float inline_abs(float x) { return abs(x); }
-__device__ __forceinline__ double inline_abs(double x) { return abs(x); }
-
-__device__ __forceinline__ int inline_sign(dtype::float16 x) {
-  return sgn<dtype::float16>(x);
-}
-__device__ __forceinline__ int inline_sign(float x) { return sgn<float>(x); }
-__device__ __forceinline__ int inline_sign(double x) { return sgn<double>(x); }
-
-__device__ __forceinline__ dtype::float16 inline_pow(dtype::float16 base,
-                                                     dtype::float16 exponent) {
-  return static_cast<dtype::float16>(
-      pow(static_cast<float>(base), static_cast<float>(exponent)));
-}
-__device__ __forceinline__ dtype::bfloat16 inline_pow(
-    dtype::bfloat16 base, dtype::bfloat16 exponent) {
-  return static_cast<dtype::bfloat16>(
-      pow(static_cast<float>(base), static_cast<float>(exponent)));
-}
-__device__ __forceinline__ float inline_pow(float base, float exponent) {
-  return pow(base, exponent);
-}
-__device__ __forceinline__ double inline_pow(double base, double exponent) {
-  return pow(base, exponent);
-}
-
 template <typename T>
 struct NonzeroFunctor {
   HOSTDEVICE explicit inline NonzeroFunctor() = default;
-- 
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