int.hpp

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#pragma once

#if defined(__CUDACC_RTC__)
#include <cuda/std/cstdint>
#else
#include <cstdint>
#endif

#include <cute/numeric/integer_subbyte.hpp>
#include <cute/numeric/uint128.hpp>

namespace cute
{

//
// Signed integers
//

using int2_t  = cute::int2b_t;
using int4_t  = cute::int4b_t;
using int8_t  = CUTE_STL_NAMESPACE::int8_t;
using int16_t = CUTE_STL_NAMESPACE::int16_t;
using int32_t = CUTE_STL_NAMESPACE::int32_t;
using int64_t = CUTE_STL_NAMESPACE::int64_t;

template <int N> struct int_bit;
template <> struct int_bit<  2>  { using type = cute::int2b_t; };
template <> struct int_bit<  4>  { using type = cute::int4b_t; };
template <> struct int_bit<  8>  { using type = int8_t;  };
template <> struct int_bit< 16>  { using type = int16_t; };
template <> struct int_bit< 32>  { using type = int32_t; };
template <> struct int_bit< 64>  { using type = int64_t; };

template <int N>
using int_bit_t = typename int_bit<N>::type;

template <int N>
using int_byte = int_bit<8*N>;

template <int N>
using int_byte_t = typename int_byte<N>::type;

//
// Unsigned integers
//

using uint1_t   = cute::uint1b_t;
using uint2_t   = cute::uint2b_t;
using uint4_t   = cute::uint4b_t;
using uint8_t   = CUTE_STL_NAMESPACE::uint8_t;
using uint16_t  = CUTE_STL_NAMESPACE::uint16_t;
using uint32_t  = CUTE_STL_NAMESPACE::uint32_t;
using uint64_t  = CUTE_STL_NAMESPACE::uint64_t;
using uint128_t = cute::uint128_t;

template <int N> struct uint_bit;
template <> struct uint_bit<  1> { using type = cute::uint1b_t; };
template <> struct uint_bit<  2> { using type = cute::uint2b_t; };
template <> struct uint_bit<  4> { using type = cute::uint4b_t; };
template <> struct uint_bit<  8> { using type = uint8_t;  };
template <> struct uint_bit< 16> { using type = uint16_t; };
template <> struct uint_bit< 32> { using type = uint32_t; };
template <> struct uint_bit< 64> { using type = uint64_t; };
template <> struct uint_bit<128> { using type = cute::uint128_t; };

template <int N>
using uint_bit_t = typename uint_bit<N>::type;

template <int N>
using uint_byte = uint_bit<8*N>;

template <int N>
using uint_byte_t = typename uint_byte<N>::type;

//
// sizeof_bytes
//

template <class T>
struct sizeof_bytes {
  static constexpr size_t value = sizeof(T);
};
template <class T>
static constexpr int sizeof_bytes_v = sizeof_bytes<T>::value;

//
// sizeof_bits
//

template <class T>
struct sizeof_bits {
  static constexpr size_t value = sizeof(T) * 8;
};

template <class T>
struct sizeof_bits<T const>: sizeof_bits<T> {};

template <>
struct sizeof_bits<void> {
  static constexpr size_t value = 0;
};

template <>
struct sizeof_bits<bool> {
  static constexpr size_t value = 1;
};

template <int Bits, bool Signed>
struct sizeof_bits<integer_subbyte<Bits,Signed>> {
  static constexpr size_t value = Bits;
};

template <class T>
static constexpr int sizeof_bits_v = sizeof_bits<T>::value;

} // namespace cute