/// Initializes the parallel sum object to sum num_element entries from a cl_mem buffer.
/// allocate_temp_buffers: if true will automatically allocate/deallocate buffers. Otherwise you need to do this elsewhere
void CRoutine_Sum_NVidia::Init(int n)
{
int status = CL_SUCCESS;
mInputSize = n;
mBufferSize = n;
// The NVidia SDK kernel on which this routine is based is designed only for power-of-two
// sized buffers. Because of this, we'll create internal buffers that round up to the
// next highest power of two.
if(!isPow2(mBufferSize))
mBufferSize = nextPow2(mBufferSize);
// TODO: Workaround for issue 32 in which kernel fails to compute sums for N = [33 - 64]
// https://github.com/bkloppenborg/liboi/issues/32
if(mBufferSize < 128)
mBufferSize = 128;
BuildKernels();
if(mTempBuffer1 == NULL)
{
mTempBuffer1 = clCreateBuffer(mContext, CL_MEM_READ_WRITE, mBufferSize * sizeof(cl_float), NULL, &status);
CHECK_OPENCL_ERROR(status, "clCreateBuffer failed.");
}
if(mTempBuffer2 == NULL)
{
mTempBuffer2 = clCreateBuffer(mContext, CL_MEM_READ_WRITE, mBufferSize * sizeof(cl_float), NULL, &status);
CHECK_OPENCL_ERROR(status, "clCreateBuffer failed.");
}
}
/// Initializes the parallel sum object to sum num_element entries from a cl_mem buffer.
/// allocate_temp_buffers: if true will automatically allocate/deallocate buffers. Otherwise you need to do this elsewhere
void CRoutine_Sum::Init(int n)
{
int err = CL_SUCCESS;
mInputSize = n;
mBufferSize = n;
// The NVidia SDK kernel on which this routine is based is designed only for power-of-two
// sized buffers. Because of this, we'll create internal buffers that round up to the
// next highest power of two.
if(!isPow2(mBufferSize))
mBufferSize = nextPow2(mBufferSize);
// TODO: Workaround for issue 32
// https://github.com/bkloppenborg/liboi/issues/32
if(mBufferSize < 128)
mBufferSize = 128;
BuildKernels();
if(mTempBuffer1 == NULL)
{
mTempBuffer1 = clCreateBuffer(mContext, CL_MEM_READ_WRITE, mBufferSize * sizeof(cl_float), NULL, &err);
mTempBuffer2 = clCreateBuffer(mContext, CL_MEM_READ_WRITE, mBufferSize * sizeof(cl_float), NULL, &err);
COpenCL::CheckOCLError("Could not create parallel sum temporary buffer.", err);
}
}