| //===-- 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 <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> |
| 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.getSign()) |
| 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.getSign() ? '1' : '0') << ", " |
| << "Exponent: 0x" |
| << uintToHex<uint16_t>(bits.getUnbiasedExponent(), |
| exponentWidthInHex) |
| << ", " |
| << "Mantissa: 0x" |
| << uintToHex<typename fputil::FPBits<ValType>::UIntType>( |
| bits.getMantissa(), 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 |