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/* Tests a kernel with an early return before a barriered region.
Copyright (c) 2012 Pekka Jääskeläinen / Tampere University of Technology
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include "pocl_opencl.h"
// Enable OpenCL C++ exceptions
#define CL_HPP_ENABLE_EXCEPTIONS
#define CL_HPP_MINIMUM_OPENCL_VERSION 120
#define CL_HPP_TARGET_OPENCL_VERSION 120
#include <CL/opencl.hpp>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#define WINDOW_SIZE 32
#define WORK_ITEMS 2
#define BUFFER_SIZE (WORK_ITEMS + WINDOW_SIZE)
static char
kernelSourceCode[] =
"kernel \n"
"void test_kernel(__global float *input, \n"
" __global int *result) {\n"
" if (input[0] == 0.0f) return;\n"
" size_t gid = get_global_id(0);\n"
" barrier(CLK_GLOBAL_MEM_FENCE);\n"
" result[gid] = input[gid];\n"
"}\n";
int
main(void)
{
float A[BUFFER_SIZE];
int R[WORK_ITEMS];
for (int i = 0; i < BUFFER_SIZE; i++) {
A[i] = (float)i;
}
for (int i = 0; i < WORK_ITEMS; i++) {
R[i] = i;
}
std::vector<cl::Platform> platformList;
bool ok = true;
try {
// Pick platform
cl::Platform::get(&platformList);
// Pick first platform
cl_context_properties cprops[] = {
CL_CONTEXT_PLATFORM, (cl_context_properties)(platformList[0])(), 0};
cl::Context context(CL_DEVICE_TYPE_ALL, cprops);
// Query the set of devices attched to the context
std::vector<cl::Device> devices = context.getInfo<CL_CONTEXT_DEVICES>();
// Create and program from source
cl::Program::Sources sources({kernelSourceCode});
cl::Program program(context, sources);
// Build program
program.build(devices);
// Create buffer for A and copy host contents
cl::Buffer aBuffer = cl::Buffer(
context,
CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR,
BUFFER_SIZE * sizeof(float),
(void *) &A[0]);
// Create buffer for that uses the host ptr C
cl::Buffer cBuffer = cl::Buffer(
context,
CL_MEM_WRITE_ONLY | CL_MEM_USE_HOST_PTR,
WORK_ITEMS * sizeof(int),
(void *) &R[0]);
// Create kernel object
cl::Kernel kernel(program, "test_kernel");
// Set kernel args
kernel.setArg(0, aBuffer);
kernel.setArg(1, cBuffer);
// Create command queue
cl::CommandQueue queue(context, devices[0], 0);
// Do the work
queue.enqueueNDRangeKernel(
kernel,
cl::NullRange,
cl::NDRange(WORK_ITEMS),
cl::NullRange);
// Map cBuffer to host pointer. This enforces a sync with
// the host backing space, remember we choose GPU device.
int * output = (int *) queue.enqueueMapBuffer(
cBuffer,
CL_TRUE, // block
CL_MAP_READ,
0,
WORK_ITEMS * sizeof(int));
for (int i = 0; i < WORK_ITEMS; i++) {
int correct = i;
if ((int)R[i] != correct) {
std::cerr
<< "F(" << i << ": " << R[i] << " != " << correct
<< ") ";
ok = false;
}
}
// Finally release our hold on accessing the memory
queue.enqueueUnmapMemObject(
cBuffer,
(void *) output);
queue.finish();
}
catch (cl::Error &err) {
std::cerr << "ERROR: " << err.what() << "(" << err.err() << ")"
<< std::endl;
return EXIT_FAILURE;
}
platformList[0].unloadCompiler();
if (ok) {
std::cout << "OK" << std::endl;
return EXIT_SUCCESS;
} else {
std::cout << "FAIL" << std::endl;
return EXIT_FAILURE;
}
}
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