1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
*/
/**
* @file fp32.h
* @brief This file contains functions to compare float values
* @ingroup COM_AI_RUNTIME
*/
#ifndef __NNFW_MISC_FP32_H__
#define __NNFW_MISC_FP32_H__
#include <cmath>
#include <cfloat>
#include <algorithm>
#include <cstdint>
namespace nnfw
{
namespace misc
{
namespace fp32
{
/**
* @brief Get the difference between two float values as a relative value.
* @param[in] lhs A float value to be compared
* @param[in] rhs A float value to be compared
* @return A relative value of difference between two float values.
*/
inline float relative_diff(float lhs, float rhs)
{
const auto diff = std::fabs(lhs - rhs);
const auto base = std::max(std::fabs(lhs), std::fabs(rhs));
return diff / base;
}
/**
* @brief Verify that an obtained float value is equal to the expected float value
* by using FLT_EPSILON
* @param[in] expected An expected float value to be compared
* @param[in] obtained An obtained float value to be compared
* @param[in] tolerance A tolerance value
* @return @c true if both values are equal, otherwise @c false
*/
inline bool epsilon_equal(float expected, float obtained, uint32_t tolerance = 1)
{
if (std::isnan(expected) && std::isnan(obtained))
{
return true;
}
// Let's use relative epsilon comparision
const auto diff = std::fabs(expected - obtained);
const auto max = std::max(std::fabs(expected), std::fabs(obtained));
return diff <= (max * FLT_EPSILON * tolerance);
}
/**
* @brief Verify that an obtained float value is equal to the expected float value
* by comparing absolute tolerance value
* @param[in] expected An expected float value to be compared
* @param[in] obtained An obtained float value to be compared
* @param[in] tolerance A tolerance value
* @return @c true if both values are equal, otherwise @c false
*/
inline bool absolute_epsilon_equal(float expected, float obtained, float tolerance = 0.001)
{
if (std::isnan(expected) && std::isnan(obtained))
{
return true;
}
// Let's use absolute epsilon comparision
const auto diff = std::fabs(expected - obtained);
return diff <= tolerance;
}
} // namespace fp32
} // namespace misc
} // namespace nnfw
#endif // __NNFW_MISC_FP32_H__
|
