xcl2.hpp

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#pragma once

#define CL_HPP_CL_1_2_DEFAULT_BUILD
#define CL_HPP_TARGET_OPENCL_VERSION 120
#define CL_HPP_MINIMUM_OPENCL_VERSION 120
#define CL_HPP_ENABLE_PROGRAM_CONSTRUCTION_FROM_ARRAY_COMPATIBILITY 1

#include <CL/cl2.hpp>
#include <iostream>
#include <fstream>

// When creating a buffer with user pointer (CL_MEM_USE_HOST_PTR), under the hood
// User ptr is used if and only if it is properly aligned (page aligned). When not 
// aligned, runtime has no choice but to create its own host side buffer that backs
// user ptr. This in turn implies that all operations that move data to and from 
// device incur an extra memcpy to move data to/from runtime's own host buffer 
// from/to user pointer. So it is recommended to use this allocator if user wish to
// Create Buffer/Memory Object with CL_MEM_USE_HOST_PTR to align user buffer to the
// page boundary. It will ensure that user buffer will be used when user create 
// Buffer/Mem Object with CL_MEM_USE_HOST_PTR.
template <typename T>
struct aligned_allocator
{
  using value_type = T;
  T* allocate(std::size_t num)
  {
    void* ptr = nullptr;
    if (posix_memalign(&ptr,4096,num*sizeof(T)))
      throw std::bad_alloc();
    return reinterpret_cast<T*>(ptr);
  }
  void deallocate(T* p, std::size_t num)
  {
    free(p);
  }
};

namespace xcl {
std::vector<cl::Device> get_xil_devices();
std::vector<cl::Device> get_devices(const std::string& vendor_name);
/* find_xclbin_file
 *
 *
 * Description:
 *   Find precompiled program (as commonly created by the Xilinx OpenCL
 *   flow). Using search path below.
 *
 *   Search Path:
 *      $XCL_BINDIR/<name>.<target>.<device>.xclbin
 *      $XCL_BINDIR/<name>.<target>.<device_versionless>.xclbin
 *      $XCL_BINDIR/binary_container_1.xclbin
 *      $XCL_BINDIR/<name>.xclbin
 *      xclbin/<name>.<target>.<device>.xclbin
 *      xclbin/<name>.<target>.<device_versionless>.xclbin
 *      xclbin/binary_container_1.xclbin
 *      xclbin/<name>.xclbin
 *      ../<name>.<target>.<device>.xclbin
 *      ../<name>.<target>.<device_versionless>.xclbin
 *      ../binary_container_1.xclbin
 *      ../<name>.xclbin
 *      ./<name>.<target>.<device>.xclbin
 *      ./<name>.<target>.<device_versionless>.xclbin
 *      ./binary_container_1.xclbin
 *      ./<name>.xclbin
 *
 * Inputs:
 *   _device_name - Targeted Device name
 *   xclbin_name - base name of the xclbin to import.
 *
 * Returns:
 *   An opencl program Binaries object that was created from xclbin_name file.
 */
std::string find_binary_file(const std::string& _device_name, const std::string& xclbin_name);
cl::Program::Binaries import_binary_file(std::string xclbin_file_name); 
bool is_emulation () ;
bool is_hw_emulation () ;

}