cuda_toolkit/include/cooperative_groups/details/info.h

 /* Copyright 1993-2021 NVIDIA Corporation.  All rights reserved.
  *
  * NOTICE TO LICENSEE:
  *
  * The source code and/or documentation ("Licensed Deliverables") are
  * subject to NVIDIA intellectual property rights under U.S. and
  * international Copyright laws.
  *
  * The Licensed Deliverables contained herein are PROPRIETARY and
  * CONFIDENTIAL to NVIDIA and are being provided under the terms and
  * conditions of a form of NVIDIA software license agreement by and
  * between NVIDIA and Licensee ("License Agreement") or electronically
  * accepted by Licensee.  Notwithstanding any terms or conditions to
  * the contrary in the License Agreement, reproduction or disclosure
  * of the Licensed Deliverables to any third party without the express
  * written consent of NVIDIA is prohibited.
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#ifndef _CG_INFO_H_
#define _CG_INFO_H_
/*
** Define: _CG_VERSION
*/
#define _CG_VERSION 1000

/*
** Define: _CG_ABI_VERSION
*/
#ifndef _CG_ABI_VERSION
# define _CG_ABI_VERSION 1
#endif

/*
** Define: _CG_ABI_EXPERIMENTAL
** Desc: If enabled, sets all features enabled (ABI-breaking or experimental)
*/
#if defined(_CG_ABI_EXPERIMENTAL)
#endif

#define _CG_CONCAT_INNER(x, y) x ## y
#define _CG_CONCAT_OUTER(x, y) _CG_CONCAT_INNER(x, y)
#define _CG_NAMESPACE _CG_CONCAT_OUTER(__v, _CG_ABI_VERSION)

#define _CG_BEGIN_NAMESPACE \
    namespace cooperative_groups { namespace _CG_NAMESPACE {
#define _CG_END_NAMESPACE \
    }; using namespace _CG_NAMESPACE; };

#if (defined(__cplusplus) && (__cplusplus >= 201103L)) || (defined(_MSC_VER) && (_MSC_VER >= 1900))
# define _CG_CPP11_FEATURES
#endif

#if !defined(_CG_QUALIFIER)
# define _CG_QUALIFIER __forceinline__ __device__
#endif
#if !defined(_CG_STATIC_QUALIFIER)
# define _CG_STATIC_QUALIFIER static __forceinline__ __device__
#endif
#if !defined(_CG_CONSTEXPR_QUALIFIER)
# if defined(_CG_CPP11_FEATURES)
#  define _CG_CONSTEXPR_QUALIFIER constexpr __forceinline__ __device__
# else
#  define _CG_CONSTEXPR_QUALIFIER _CG_QUALIFIER
# endif
#endif
#if !defined(_CG_STATIC_CONSTEXPR_QUALIFIER)
# if defined(_CG_CPP11_FEATURES)
#  define _CG_STATIC_CONSTEXPR_QUALIFIER static constexpr __forceinline__ __device__
# else
#  define _CG_STATIC_CONSTEXPR_QUALIFIER _CG_STATIC_QUALIFIER
# endif
#endif

#if defined(_MSC_VER)
# define _CG_DEPRECATED __declspec(deprecated)
#else
# define _CG_DEPRECATED __attribute__((deprecated))
#endif

#if (__CUDA_ARCH__ >= 600) || !defined(__CUDA_ARCH__)
# define _CG_HAS_GRID_GROUP
#endif
#if (__CUDA_ARCH__ >= 600) || !defined(__CUDA_ARCH__)
# define _CG_HAS_MULTI_GRID_GROUP
#endif
#if (__CUDA_ARCH__ >= 700) || !defined(__CUDA_ARCH__)
# define _CG_HAS_MATCH_COLLECTIVE
#endif

#if (__CUDA_ARCH__ >= 800) || !defined(__CUDA_ARCH__) && (defined(__NVCC__) || defined(__CUDACC_RTC__))
# define _CG_HAS_OP_REDUX
#endif

#if ((__CUDA_ARCH__ >= 800) || !defined(__CUDA_ARCH__)) && !defined(_CG_USER_PROVIDED_SHARED_MEMORY)
# define _CG_HAS_RESERVED_SHARED
#endif

#if ((__CUDA_ARCH__ >= 900) || !defined(__CUDA_ARCH__)) && \
    (defined(__NVCC__) || defined(__CUDACC_RTC__) || defined(_CG_CLUSTER_INTRINSICS_AVAILABLE)) && \
    defined(_CG_CPP11_FEATURES)
# define _CG_HAS_CLUSTER_GROUP
#endif

#if (__CUDA_ARCH__ >= 900) || !defined(__CUDA_ARCH__)
# define _CG_HAS_INSTR_ELECT
#endif

// Has __half and __half2
// Only usable if you include the cuda_fp16.h extension, and
// _before_ including cooperative_groups.h
#ifdef __CUDA_FP16_TYPES_EXIST__
# define _CG_HAS_FP16_COLLECTIVE
#endif

// Include libcu++ where supported.
#if defined(_CG_CPP11_FEATURES) && !defined(__QNX__) && !defined(__ibmxl__) && \
    (defined(__NVCC__) || defined(__CUDACC_RTC__)) && \
    (defined(__x86_64__) || defined(__aarch64__) || defined(__ppc64__)|| defined(_M_X64) || defined(_M_ARM64)) && \
    (defined(_MSC_VER) || defined(__GNUC__) || defined(__clang__))
# define _CG_USE_CUDA_STL
#else
# define _CG_USE_OWN_TRAITS
#endif

#if defined(_CG_USE_CUDA_STL) && (!defined(__CUDA_ARCH__) || \
    ((!defined(_MSC_VER) && __CUDA_ARCH__ >= 600) || (defined(_MSC_VER) && __CUDA_ARCH__ >= 700)))
# define _CG_HAS_STL_ATOMICS
#endif

#ifdef _CG_CPP11_FEATURES
// Use cuda::std:: for type_traits
# if defined(_CG_USE_CUDA_STL)
#  define _CG_STL_NAMESPACE cuda::std
#  include <cuda/std/type_traits>
// Use CG's implementation of type traits
# else
#  define _CG_STL_NAMESPACE cooperative_groups::details::templates
# endif
#endif

#ifdef _CG_CPP11_FEATURES
# define _CG_STATIC_CONST_DECL static constexpr
# define _CG_CONST_DECL constexpr
#else
# define _CG_STATIC_CONST_DECL static const
# define _CG_CONST_DECL const
#endif

#if (defined(_MSC_VER) && !defined(_WIN64)) || defined(__arm__)
# define _CG_ASM_PTR_CONSTRAINT "r"
#else
#  define _CG_ASM_PTR_CONSTRAINT "l"
#endif

/*
** Define: CG_DEBUG
** What: Enables various runtime safety checks
*/
#if defined(__CUDACC_DEBUG__) && defined(CG_DEBUG) && !defined(NDEBUG)
# define _CG_DEBUG
#endif

#if defined(_CG_DEBUG)
# include <assert.h>
# define _CG_ASSERT(x) assert((x));
# define _CG_ABORT() assert(0);
#else
# define _CG_ASSERT(x)
# define _CG_ABORT() __trap();
#endif

_CG_BEGIN_NAMESPACE

namespace details {
    _CG_STATIC_CONST_DECL unsigned int default_max_block_size = 1024;

#if defined(_CG_CPP11_FEATURES) && !defined(_CG_USE_CUDA_STL)
namespace templates {

/**
 * Integral constants
 **/
template <typename Ty, Ty Val>
struct integral_constant {
    static constexpr Ty value = Val;
    typedef Ty type;

    _CG_QUALIFIER constexpr operator type() const noexcept { return value; }
    _CG_QUALIFIER constexpr type operator()() const noexcept { return value; }
};

typedef integral_constant<bool, true>  true_type;
typedef integral_constant<bool, false> false_type;

/**
 * CV Qualifiers
 **/
template <class Ty> struct is_lvalue_reference       : public details::templates::false_type {};
template <class Ty> struct is_lvalue_reference<Ty&>  : public details::templates::true_type {};

template <class Ty> struct remove_reference       {typedef Ty type;};
template <class Ty> struct remove_reference<Ty&>  {typedef Ty type;};
template <class Ty> struct remove_reference<Ty&&> {typedef Ty type;};

template <class Ty>
using remove_reference_t = typename details::templates::remove_reference<Ty>::type;

template <class Ty> struct remove_const           {typedef Ty type;};
template <class Ty> struct remove_const<const Ty> {typedef Ty type;};

template <class Ty> struct remove_volatile              {typedef Ty type;};
template <class Ty> struct remove_volatile<volatile Ty> {typedef Ty type;};

template <class Ty> struct remove_cv {typedef typename details::templates::remove_volatile<typename details::templates::remove_const<Ty>::type>::type type;};

template <class Ty>
using remove_cv_t = typename details::templates::remove_cv<Ty>::type;

template <class Ty>
_CG_QUALIFIER Ty&& forward(remove_reference_t<Ty> &t) noexcept {
    return static_cast<Ty&&>(t);
}

template <class Ty>
_CG_QUALIFIER Ty&& forward(remove_reference_t<Ty> &&t) noexcept {
    static_assert(!details::templates::is_lvalue_reference<Ty>::value, "Forwarding an rvalue as an lvalue is not allowed.");
    return static_cast<Ty&&>(t);
}

/**
 * is_integral
 **/
template <class Ty> struct _is_integral                     : public details::templates::false_type {};
template <>         struct _is_integral<bool>               : public details::templates::true_type {};
template <>         struct _is_integral<char>               : public details::templates::true_type {};
template <>         struct _is_integral<unsigned char>      : public details::templates::true_type {};
template <>         struct _is_integral<short>              : public details::templates::true_type {};
template <>         struct _is_integral<unsigned short>     : public details::templates::true_type {};
template <>         struct _is_integral<int>                : public details::templates::true_type {};
template <>         struct _is_integral<unsigned int>       : public details::templates::true_type {};
template <>         struct _is_integral<long>               : public details::templates::true_type {};
template <>         struct _is_integral<long long>          : public details::templates::true_type {};
template <>         struct _is_integral<unsigned long>      : public details::templates::true_type {};
template <>         struct _is_integral<unsigned long long> : public details::templates::true_type {};
//Vector type support?

template <typename Ty>
struct is_integral : public details::templates::_is_integral<typename details::templates::remove_cv<Ty>::type> {};

/**
 * is_floating_point
 **/
template <class Ty> struct _is_floating_point              : public details::templates::false_type {};
template <>         struct _is_floating_point<float>       : public details::templates::true_type {};
template <>         struct _is_floating_point<double>      : public details::templates::true_type {};
template <>         struct _is_floating_point<long double> : public details::templates::true_type {};
# ifdef __CUDA_FP16_TYPES_EXIST__
template <>         struct _is_floating_point<__half>      : public details::templates::true_type {};
template <>         struct _is_floating_point<__half2>     : public details::templates::true_type {};
# endif
//Vector type support?

template <typename Ty>
struct is_floating_point : public details::templates::_is_floating_point<typename details::templates::remove_cv<Ty>::type> {};

template <class T>
struct is_arithmetic : details::templates::integral_constant<
    bool,
    details::templates::is_integral<T>::value ||
    details::templates::is_floating_point<T>::value> {};

template <typename Ty, bool = details::templates::is_arithmetic<Ty>::value>
struct _is_unsigned : details::templates::integral_constant<bool, Ty(0) < Ty(-1)> {};

template <typename Ty>
struct _is_unsigned<Ty,false> : details::templates::false_type {};

template <typename Ty>
struct is_unsigned : _is_unsigned<typename details::templates::remove_cv<Ty>::type> {};

template <typename Ty> struct _is_pointer      : public details::templates::false_type {};
template <typename Ty> struct _is_pointer<Ty*> : public details::templates::true_type {};

template <typename Ty>
struct is_pointer : _is_pointer<typename details::templates::remove_cv<Ty>::type> {};

/**
 * programmatic type traits
 **/
template<bool B, class Ty = void>
struct enable_if {};

template<class Ty>
struct enable_if<true, Ty> { typedef Ty type; };

template<bool Cond, typename Ty = void>
using enable_if_t = typename details::templates::enable_if<Cond, Ty>::type;

template<class Ty1, class Ty2>
struct is_same : details::templates::false_type {};

template<class Ty>
struct is_same<Ty, Ty> : details::templates::true_type {};

} // templates
#endif // _CG_CPP11_FEATURES

} // details
_CG_END_NAMESPACE


#endif // _CG_INFO_H_