copy_xe.hpp

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#pragma once
#include <cute/arch/xe_copy_1B.hpp>
#include <cute/arch/xe_copy_2B.hpp>
#include <cute/arch/xe_copy_4B.hpp>
#include <cute/arch/xe_copy_8B.hpp>
#ifdef __SYCL_DEVICE_ONLY__
#define SYCL_DEVICE_BUILTIN(x) SYCL_EXTERNAL extern "C" x
#else
#define SYCL_DEVICE_BUILTIN(x) inline x { assert(false); }
#endif

using namespace cute;

// prefetch
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_uchar(
    const __attribute__((opencl_global)) uint8_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_ushort(
    const __attribute__((opencl_global)) uint16_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_uint(
    const __attribute__((opencl_global)) uint32_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_uint2(
    const __attribute__((opencl_global)) uint32_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_uint4(
    const __attribute__((opencl_global)) uint32_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_uint8(
    const __attribute__((opencl_global)) uint32_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_ulong(
    const __attribute__((opencl_global)) uint64_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_ulong2(
    const __attribute__((opencl_global)) uint64_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_ulong4(
    const __attribute__((opencl_global)) uint64_t *base, int immElemOff,
    enum CacheControl cacheOpt));
SYCL_DEVICE_BUILTIN(void __builtin_IB_lsc_prefetch_global_ulong8(
    const __attribute__((opencl_global)) uint64_t *base, int immElemOff,
    enum CacheControl cacheOpt));
#undef SYCL_DEVICE_BUILTIN

namespace cute
{
template<class S, class D = S>
struct XE_ATOMIC {
  using SRegisters = S[1];
  using DRegisters = D[1];

  CUTE_STATIC_ASSERT(is_same_v<S, float> || is_same_v<S, double> || is_same_v<S, int>);

  template<class S_, class D_>
  CUTE_HOST_DEVICE static void
  copy(S_ const& src, D_ & dst) {
    #if defined(SYCL_INTEL_TARGET)
      auto v = sycl::atomic_ref<D_, sycl::memory_order::relaxed,
                                  sycl::memory_scope::device,
                                  sycl::access::address_space::global_space>(*&dst);
      v += static_cast<D_>(*&src);
    #else
      CUTE_INVALID_CONTROL_PATH("Trying to use block loads on non-PVC hardware");
    #endif
  }
};

template <class S, class D = S>
struct XE_1D_LDSM {
  using SRegisters = S[1];
  using DRegisters = D[1];

  CUTE_STATIC_ASSERT(sizeof(D) % sizeof(S) == 0,
    "dst failed to vectorize into registers");
  static constexpr size_t N = sizeof(D) / sizeof(S);
  CUTE_STATIC_ASSERT(N == 1 || N == 2 || N == 4 || N == 8,
    "register vector only supports 1, 2, 4, 8");

  template<class S_, class D_>
  CUTE_HOST_DEVICE static void
  copy(const S_ &src, D_ &dst) {
    #if defined(SYCL_INTEL_TARGET)
      CUTE_STATIC_ASSERT(sizeof(S_) == sizeof(S));
      auto sg = sycl::ext::oneapi::this_work_item::get_nd_item<3>().get_sub_group();
      *(sycl::vec<S_, N>*)(&dst)
        = sg.load<N>(sycl::address_space_cast<sycl::access::address_space::local_space,
                  sycl::access::decorated::yes>(&*&src));
    #else
      CUTE_INVALID_CONTROL_PATH("Trying to use block loads on non-PVC hardware");
    #endif 
  }
};

template <class S, class D = S>
struct PREFETCH {
  using SRegisters = S[1];
  using DRegisters = D[1];

  template <class S_, class D_>
  CUTE_HOST_DEVICE static void copy(const S_ &src, D_ &dst) {
#if defined(SYCL_INTEL_TARGET)
    if constexpr(sizeof(D) == 1) {
      __builtin_IB_lsc_prefetch_global_uchar(
          (const __attribute__((opencl_global)) uint8_t *)(&*&src), 0, CacheControl::kL1C_L3C);
    }
    else if constexpr(sizeof(D) == 2) {
      __builtin_IB_lsc_prefetch_global_ushort(
          (const __attribute__((opencl_global)) uint16_t *)(&*&src), 0, CacheControl::kL1C_L3C);
    }
    else if constexpr(sizeof(D) == 4) {
      __builtin_IB_lsc_prefetch_global_uint(
          (const __attribute__((opencl_global)) uint32_t *)(&*&src), 0, CacheControl::kL1C_L3C);
    }
    else if constexpr(sizeof(D) == 8) {
      __builtin_IB_lsc_prefetch_global_uint2(
          (const __attribute__((opencl_global)) uint32_t *)(&*&src), 0, CacheControl::kL1C_L3C);
    }
    else if constexpr(sizeof(D) == 16) {
      __builtin_IB_lsc_prefetch_global_uint4(
          (const __attribute__((opencl_global)) uint32_t *)(&*&src), 0, CacheControl::kL1C_L3C);
    }
    else if constexpr(sizeof(D) == 32) {
      __builtin_IB_lsc_prefetch_global_uint8(
          (const __attribute__((opencl_global)) uint32_t *)(&*&src), 0, CacheControl::kL1C_L3C);
    }
    else if constexpr(sizeof(D) == 64) {
      __builtin_IB_lsc_prefetch_global_ulong8(
          (const __attribute__((opencl_global)) uint64_t *)(&*&src), 0, CacheControl::kL1C_L3C);
    }
#else
      CUTE_INVALID_CONTROL_PATH(
          "Trying to use block prefetch on non-PVC hardware");
#endif
    }
};

template <class S, class D = S>
struct XE_1D_LOAD_GLOBAL {
  using SRegisters = S[1];
  using DRegisters = D[1];

  CUTE_STATIC_ASSERT(sizeof(D) % sizeof(S) == 0,
    "dst failed to vectorize into registers");
  static constexpr size_t N = sizeof(D) / sizeof(S);
  CUTE_STATIC_ASSERT(N == 1 || N == 2 || N == 4 || N == 8,
    "register vector only supports 1, 2, 4, 8");

  template<class S_, class D_>
  CUTE_HOST_DEVICE static void
  copy(const S_ &src, D_ &dst) {
    #if defined(SYCL_INTEL_TARGET)
      CUTE_STATIC_ASSERT(sizeof(S_) == sizeof(S));
      CUTE_STATIC_ASSERT(sizeof(D_) == sizeof(D));
      auto sg = sycl::ext::oneapi::this_work_item::get_nd_item<3>().get_sub_group();
      *(sycl::vec<S_, N>*)(&dst) 
        = sg.load<N>(sycl::address_space_cast<sycl::access::address_space::global_space,
                  sycl::access::decorated::yes>(&*&src));
    #else
      CUTE_INVALID_CONTROL_PATH("Trying to use block loads on non-PVC hardware");
    #endif 
  }

  using PREFETCH = PREFETCH<S, D>;

};

template<class S, class D = S>
struct XE_1D_STSM {
  using SRegisters = S[1];
  using DRegisters = D[1];

  CUTE_STATIC_ASSERT(sizeof(S) % sizeof(D) == 0,
      "src failed to vectorize into registers");
  static constexpr size_t N = sizeof(S) / sizeof(D);
  CUTE_STATIC_ASSERT(N == 1 || N == 2 || N == 4 || N == 8,
      "register vector only supports 1, 2, 4, 8");

  template<class S_, class D_>
  CUTE_HOST_DEVICE static void
  copy(S_ const& src, D_ & dst) {
    #if defined(SYCL_INTEL_TARGET)
      auto sg = sycl::ext::oneapi::this_work_item::get_nd_item<3>().get_sub_group();
      sg.store<N>(sycl::address_space_cast<sycl::access::address_space::local_space,
            sycl::access::decorated::yes>(&*&dst), *(sycl::vec<D_, N>*)(&src));
    #else
      CUTE_INVALID_CONTROL_PATH("Trying to use block loads on non-PVC hardware");
    #endif
  }
};

template<class S, class D = S>
struct XE_1D_STORE_GLOBAL {
  using SRegisters = S[1];
  using DRegisters = D[1];

  CUTE_STATIC_ASSERT(sizeof(S) % sizeof(D) == 0,
      "src failed to vectorize into registers");
  static constexpr size_t N = sizeof(S) / sizeof(D);
  CUTE_STATIC_ASSERT(N == 1 || N == 2 || N == 4 || N == 8,
      "register vector only supports 1, 2, 4, 8");

  template<class S_, class D_>
  CUTE_HOST_DEVICE static void
  copy(S_ const& src, D_ &dst) {
    #if defined(SYCL_INTEL_TARGET)
      auto sg = sycl::ext::oneapi::this_work_item::get_nd_item<3>().get_sub_group();
      sg.store<N>(sycl::address_space_cast<sycl::access::address_space::global_space,
            sycl::access::decorated::yes>(&*&dst), *(sycl::vec<D_, N>*)(&src));
    #else
      CUTE_INVALID_CONTROL_PATH("Trying to use block loads on non-PVC hardware");
    #endif
  }
};
} // end namespace cute