// a value is Nan.
template <typename T>
struct FloatProxyTraits {
- using uint_type = void;
+ typedef void uint_type;
};
template <>
struct FloatProxyTraits<float> {
- using uint_type = uint32_t;
+ typedef uint32_t uint_type;
static bool isNan(float f) { return std::isnan(f); }
// Returns true if the given value is any kind of infinity.
static bool isInfinity(float f) { return std::isinf(f); }
template <>
struct FloatProxyTraits<double> {
- using uint_type = uint64_t;
+ typedef uint64_t uint_type;
static bool isNan(double f) { return std::isnan(f); }
// Returns true if the given value is any kind of infinity.
static bool isInfinity(double f) { return std::isinf(f); }
template <>
struct FloatProxyTraits<Float16> {
- using uint_type = uint16_t;
+ typedef uint16_t uint_type;
static bool isNan(Float16 f) { return Float16::isNan(f); }
// Returns true if the given value is any kind of infinity.
static bool isInfinity(Float16 f) { return Float16::isInfinity(f); }
template <typename T>
class FloatProxy {
public:
- using uint_type = typename FloatProxyTraits<T>::uint_type;
+ typedef typename FloatProxyTraits<T>::uint_type uint_type;
// Since this is to act similar to the normal floats,
// do not initialize the data by default.
template <typename T>
struct HexFloatTraits {
// Integer type that can store this hex-float.
- using uint_type = void;
+ typedef void uint_type;
// Signed integer type that can store this hex-float.
- using int_type = void;
+ typedef void int_type;
// The numerical type that this HexFloat represents.
- using underlying_type = void;
+ typedef void underlying_type;
// The type needed to construct the underlying type.
- using native_type = void;
+ typedef void native_type;
// The number of bits that are actually relevant in the uint_type.
// This allows us to deal with, for example, 24-bit values in a 32-bit
// integer.
// 1 sign bit, 8 exponent bits, 23 fractional bits.
template <>
struct HexFloatTraits<FloatProxy<float>> {
- using uint_type = uint32_t;
- using int_type = int32_t;
- using underlying_type = FloatProxy<float>;
- using native_type = float;
+ typedef uint32_t uint_type;
+ typedef int32_t int_type;
+ typedef FloatProxy<float> underlying_type;
+ typedef float native_type;
static const uint_type num_used_bits = 32;
static const uint_type num_exponent_bits = 8;
static const uint_type num_fraction_bits = 23;
// 1 sign bit, 11 exponent bits, 52 fractional bits.
template <>
struct HexFloatTraits<FloatProxy<double>> {
- using uint_type = uint64_t;
- using int_type = int64_t;
- using underlying_type = FloatProxy<double>;
- using native_type = double;
+ typedef uint64_t uint_type;
+ typedef int64_t int_type;
+ typedef FloatProxy<double> underlying_type;
+ typedef double native_type;
static const uint_type num_used_bits = 64;
static const uint_type num_exponent_bits = 11;
static const uint_type num_fraction_bits = 52;
// 1 sign bit, 5 exponent bits, 10 fractional bits.
template <>
struct HexFloatTraits<FloatProxy<Float16>> {
- using uint_type = uint16_t;
- using int_type = int16_t;
- using underlying_type = uint16_t;
- using native_type = uint16_t;
+ typedef uint16_t uint_type;
+ typedef int16_t int_type;
+ typedef uint16_t underlying_type;
+ typedef uint16_t native_type;
static const uint_type num_used_bits = 16;
static const uint_type num_exponent_bits = 5;
static const uint_type num_fraction_bits = 10;
template <typename T, typename Traits = HexFloatTraits<T>>
class HexFloat {
public:
- using uint_type = typename Traits::uint_type;
- using int_type = typename Traits::int_type;
- using underlying_type = typename Traits::underlying_type;
- using native_type = typename Traits::native_type;
+ typedef typename Traits::uint_type uint_type;
+ typedef typename Traits::int_type int_type;
+ typedef typename Traits::underlying_type underlying_type;
+ typedef typename Traits::native_type native_type;
explicit HexFloat(T f) : value_(f) {}
template <typename other_T>
typename other_T::uint_type getRoundedNormalizedSignificand(
round_direction dir, bool* carry_bit) {
- using other_uint_type = typename other_T::uint_type;
+ typedef typename other_T::uint_type other_uint_type;
static const int_type num_throwaway_bits =
static_cast<int_type>(num_fraction_bits) -
static_cast<int_type>(other_T::num_fraction_bits);
bool round_underflow_up =
isNegative() ? round_dir == kRoundToNegativeInfinity
: round_dir == kRoundToPositiveInfinity;
- using other_int_type = typename other_T::int_type;
+ typedef typename other_T::int_type other_int_type;
// setFromSignUnbiasedExponentAndNormalizedSignificand will
// zero out any underflowing value (but retain the sign).
other.setFromSignUnbiasedExponentAndNormalizedSignificand(
// Outputs the given HexFloat to the stream.
template <typename T, typename Traits>
std::ostream& operator<<(std::ostream& os, const HexFloat<T, Traits>& value) {
- using HF = HexFloat<T, Traits>;
- using uint_type = typename HF::uint_type;
- using int_type = typename HF::int_type;
+ typedef HexFloat<T, Traits> HF;
+ typedef typename HF::uint_type uint_type;
+ typedef typename HF::int_type int_type;
static_assert(HF::num_used_bits != 0,
"num_used_bits must be non-zero for a valid float");