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
|
//===-- TestMatchers.cpp ----------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "FPMatcher.h"
#include "src/__support/FPUtil/FPBits.h"
#include <sstream>
#include <string>
namespace __llvm_libc {
namespace fputil {
namespace testing {
// Return the first N hex digits of an integer as a string in upper case.
template <typename T>
cpp::EnableIfType<cpp::IsIntegral<T>::Value, std::string>
uintToHex(T X, size_t Length = sizeof(T) * 2) {
std::string s(Length, '0');
for (auto it = s.rbegin(), end = s.rend(); it != end; ++it, X >>= 4) {
unsigned char Mod = static_cast<unsigned char>(X) & 15;
*it = (Mod < 10 ? '0' + Mod : 'a' + Mod - 10);
}
return s;
}
template <typename ValType, typename StreamType>
cpp::EnableIfType<cpp::IsFloatingPointType<ValType>::Value, void>
describeValue(const char *label, ValType value, StreamType &stream) {
stream << label;
FPBits<ValType> bits(value);
if (bits.is_nan()) {
stream << "(NaN)";
} else if (bits.is_inf()) {
if (bits.get_sign())
stream << "(-Infinity)";
else
stream << "(+Infinity)";
} else {
constexpr int exponentWidthInHex =
(fputil::ExponentWidth<ValType>::VALUE - 1) / 4 + 1;
constexpr int mantissaWidthInHex =
(fputil::MantissaWidth<ValType>::VALUE - 1) / 4 + 1;
constexpr int bitsWidthInHex =
sizeof(typename fputil::FPBits<ValType>::UIntType) * 2;
stream << "0x"
<< uintToHex<typename fputil::FPBits<ValType>::UIntType>(
bits.uintval(), bitsWidthInHex)
<< ", (S | E | M) = (" << (bits.get_sign() ? '1' : '0') << " | 0x"
<< uintToHex<uint16_t>(bits.get_unbiased_exponent(),
exponentWidthInHex)
<< " | 0x"
<< uintToHex<typename fputil::FPBits<ValType>::UIntType>(
bits.get_mantissa(), mantissaWidthInHex)
<< ")";
}
stream << '\n';
}
template void describeValue<float>(const char *, float,
testutils::StreamWrapper &);
template void describeValue<double>(const char *, double,
testutils::StreamWrapper &);
template void describeValue<long double>(const char *, long double,
testutils::StreamWrapper &);
template void describeValue<float>(const char *, float, std::stringstream &);
template void describeValue<double>(const char *, double, std::stringstream &);
template void describeValue<long double>(const char *, long double,
std::stringstream &);
} // namespace testing
} // namespace fputil
} // namespace __llvm_libc
|
