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//===-- Bit patterns of common floating point numbers -----------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIBC_UTILS_FPUTIL_BIT_PATTERNS_H
#define LLVM_LIBC_UTILS_FPUTIL_BIT_PATTERNS_H
#include "FloatProperties.h"
#include <float.h>
static_assert(
FLT_RADIX == 2,
"LLVM libc only supports radix 2 IEEE 754 floating point formats.");
namespace __llvm_libc {
namespace fputil {
template <typename T> struct BitPatterns {};
template <> struct BitPatterns<float> {
using BitsType = FloatProperties<float>::BitsType;
static constexpr BitsType inf = 0x7f800000U;
static constexpr BitsType negInf = 0xff800000U;
static constexpr BitsType zero = 0x0;
static constexpr BitsType negZero = 0x80000000U;
static constexpr BitsType one = 0x3f800000U;
// Examples of quiet NAN.
static constexpr BitsType aQuietNaN = 0x7fc00000U;
static constexpr BitsType aNegativeQuietNaN = 0xffc00000U;
// Examples of signalling NAN.
static constexpr BitsType aSignallingNaN = 0x7f800001U;
static constexpr BitsType aNegativeSignallingNaN = 0xff800001U;
};
template <> struct BitPatterns<double> {
using BitsType = FloatProperties<double>::BitsType;
static constexpr BitsType inf = 0x7ff0000000000000ULL;
static constexpr BitsType negInf = 0xfff0000000000000ULL;
static constexpr BitsType zero = 0x0ULL;
static constexpr BitsType negZero = 0x8000000000000000ULL;
static constexpr BitsType one = 0x3FF0000000000000ULL;
// Examples of quiet NAN.
static constexpr BitsType aQuietNaN = 0x7ff8000000000000ULL;
static constexpr BitsType aNegativeQuietNaN = 0xfff8000000000000ULL;
// Examples of signalling NAN.
static constexpr BitsType aSignallingNaN = 0x7ff0000000000001ULL;
static constexpr BitsType aNegativeSignallingNaN = 0xfff0000000000001ULL;
};
} // namespace fputil
} // namespace __llvm_libc
#endif // LLVM_LIBC_UTILS_FPUTIL_BIT_PATTERNS_H
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