wehub-resource-sync
85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
/* 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
|
|
#include <limits>
|
|
|
|
#include "paddle/common/hostdevice.h"
|
|
#include "paddle/phi/core/dense_tensor.h"
|
|
#include "paddle/phi/kernels/funcs/eigen/common.h"
|
|
|
|
namespace phi {
|
|
namespace funcs {
|
|
|
|
template <typename T>
|
|
struct TolerableValue {
|
|
HOSTDEVICE T operator()(const T& x) const {
|
|
PADDLE_ENFORCE(std::is_floating_point<T>::value,
|
|
"TolerableValue should be float in cross_entropy.");
|
|
const T kApproInf = 1e20;
|
|
|
|
if (x == INFINITY) return kApproInf;
|
|
if (x == -INFINITY) return -kApproInf;
|
|
return x;
|
|
}
|
|
};
|
|
|
|
// NOTE(dzh): float16 value clip behave different.
|
|
// 1. Our ValueClipping has a hardcore threshold 1e20
|
|
// for float number. 1e20 will resulting in overflow in float16.
|
|
// 2. float16 should expose the real number overflow to python.
|
|
// because mixed-training depends the inf/nan value to determine
|
|
// if the scale value will be adjusted.
|
|
// Also. In standard implementation of cross entropy, other
|
|
// framework not has the ValueClipping.
|
|
template <>
|
|
struct TolerableValue<phi::float16> {
|
|
HOSTDEVICE phi::float16 operator()(const phi::float16& x) const {
|
|
if (phi::dtype::isfinite(x)) {
|
|
return x;
|
|
} else if (x > static_cast<phi::float16>(0)) {
|
|
return std::numeric_limits<phi::float16>::max();
|
|
} else {
|
|
return std::numeric_limits<phi::float16>::min();
|
|
}
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct TolerableValue<phi::bfloat16> {
|
|
HOSTDEVICE phi::bfloat16 operator()(const phi::bfloat16& x) const {
|
|
if (phi::dtype::isfinite(x)) {
|
|
return x;
|
|
} else if (x > static_cast<phi::bfloat16>(0)) {
|
|
return std::numeric_limits<phi::bfloat16>::max();
|
|
} else {
|
|
return std::numeric_limits<phi::bfloat16>::min();
|
|
}
|
|
}
|
|
};
|
|
|
|
template <typename DeviceContext, typename T>
|
|
class CrossEntropyFunctor {
|
|
public:
|
|
void operator()(const DeviceContext& dev_ctx,
|
|
DenseTensor* out,
|
|
const DenseTensor* prob,
|
|
const DenseTensor* labels,
|
|
const bool softLabel,
|
|
const int ignore_index,
|
|
const int64_t axis_dim);
|
|
};
|
|
} // namespace funcs
|
|
} // namespace phi
|