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
|
// Copyright (c) 2023-2024, ARM Limited.
//
// 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.
#include <cmath>
#include <limits>
#include <memory>
#include <type_traits>
#include <utility>
#include "half.hpp"
#include "verifiers.h"
namespace TosaReference
{
namespace
{
template <typename OutType>
double calcErrorBound(double referenceValue, double boundsValue, const void* cfgPtr)
{
const auto cfg = reinterpret_cast<const UlpVerifyInfo*>(cfgPtr);
unused(boundsValue);
double errBound = 0.0;
if (std::isfinite(referenceValue) && std::abs(referenceValue) != 0.0)
{
// Find the exponent of the reference value.
int32_t refExponent = ilog2(std::abs(referenceValue));
// Work out the values magnitude - by raising 2 to the power of the
// exponent and taking the normalized minimum for denormal values
const double refPower2 = std::max(exp2(refExponent), AccPrecision<OutType>::normal_min);
// Get the value of changing the last bit - by shifting the least significant bit to this magnitude
// i.e. the ULP.
double ulpValue = refPower2 * exp2(-AccPrecision<OutType>::normal_frac);
errBound = ulpValue * cfg->ulp;
}
return errBound;
}
} // namespace
bool verifyULP(const CTensor* referenceTensor, const CTensor* implementationTensor, const UlpVerifyInfo& ulpInfo)
{
// Validate that tensors are provided
TOSA_REF_REQUIRE(referenceTensor != nullptr, "[ULP] Reference tensor is missing");
TOSA_REF_REQUIRE(implementationTensor != nullptr, "[ULP] Implementation tensor is missing");
const std::vector<int32_t> refShape(referenceTensor->shape, referenceTensor->shape + referenceTensor->num_dims);
const auto* refData = reinterpret_cast<const double*>(referenceTensor->data);
TOSA_REF_REQUIRE(refData != nullptr, "[ULP] Missing data for reference");
const std::string modeStr = "ULP";
switch (implementationTensor->data_type)
{
case tosa_datatype_fp32_t: {
const auto* impData = reinterpret_cast<const float*>(implementationTensor->data);
TOSA_REF_REQUIRE(impData != nullptr, "[ULP] Missing data for implementation");
return validateData(refData, nullptr, impData, refShape, modeStr, &ulpInfo, &calcErrorBound<float>);
}
case tosa_datatype_fp16_t: {
const auto* impData = reinterpret_cast<const half_float::half*>(implementationTensor->data);
TOSA_REF_REQUIRE(impData != nullptr, "[ULP] Missing data for implementation");
return validateData(refData, nullptr, impData, refShape, modeStr, &ulpInfo,
&calcErrorBound<half_float::half>);
}
default:
WARNING("[Verifier][ULP] Data-type not supported.");
break;
}
return false;
}
} // namespace TosaReference
|
