- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
38 lines
1 KiB
C++
38 lines
1 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Define a hexfloat literal emulator since we can't depend on being able to
|
|
// for hexfloat literals
|
|
|
|
// 0x10.F5p-10 == hexfloat<double>(0x10, 0xF5, -10)
|
|
|
|
#ifndef HEXFLOAT_H
|
|
#define HEXFLOAT_H
|
|
|
|
#include <algorithm>
|
|
#include <cmath>
|
|
#include <climits>
|
|
|
|
template <class T>
|
|
class hexfloat
|
|
{
|
|
T value_;
|
|
public:
|
|
hexfloat(long long m1, unsigned long long m0, int exp)
|
|
{
|
|
const std::size_t n = sizeof(unsigned long long) * CHAR_BIT;
|
|
int s = m1 < 0 ? -1 : 1;
|
|
value_ = std::ldexp(m1 + s * std::ldexp(T(m0), -static_cast<int>(n -
|
|
std::__clz(m0)/4*4)), exp);
|
|
}
|
|
|
|
operator T() const {return value_;}
|
|
};
|
|
|
|
#endif
|