TestHelpers.cpp
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//===-- 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 "TestHelpers.h"
#include "FPBits.h"
#include "llvm/ADT/StringExtras.h"
#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 = llvm::hexdigit(Mod, true);
}
return s;
}
template <typename ValType>
cpp::EnableIfType<cpp::IsFloatingPointType<ValType>::Value, void>
describeValue(const char *label, ValType value,
testutils::StreamWrapper &stream) {
stream << label;
FPBits<ValType> bits(value);
if (bits.isNaN()) {
stream << "(NaN)";
} else if (bits.isInf()) {
if (bits.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;
stream << "Sign: " << (bits.sign ? '1' : '0') << ", "
<< "Exponent: 0x"
<< uintToHex<uint16_t>(bits.exponent, exponentWidthInHex) << ", "
<< "Mantissa: 0x"
<< uintToHex<typename fputil::FPBits<ValType>::UIntType>(
bits.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 &);
} // namespace testing
} // namespace fputil
} // namespace __llvm_libc