scalar_residual.c

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/*
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   * Redistributions in binary form must reproduce the above
     copyright notice, this list of conditions and the following
     disclaimer in the documentation and/or other materials provided
     with the distribution.
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     contributors may be used to endorse or promote products derived
     from this software without specific prior written permission.
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 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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#ifdef __APPLE__
#include <OpenCL/cl.h>
#else
#include <CL/cl.h>
#endif
 
#include <stdio.h>
#include <device/device_config.h>
#include <device/opencl/jit.h>
#include <device/opencl/prgm_lib.h>
#include <device/opencl/check.h>
 
#include "scalar_residual_kernel.cl.h"
 
 
void scalar_residual_update_opencl(void *s_res, void *f_s, int *n) {
  cl_int err;
  
  if (scalar_residual_program == NULL)
    opencl_kernel_jit(scalar_residual_kernel, (cl_program *) &scalar_residual_program);
 
  cl_kernel kernel = clCreateKernel(scalar_residual_program,
                                    "scalar_residual_update_kernel", &err);
  CL_CHECK(err);
 
  CL_CHECK(clSetKernelArg(kernel, 0, sizeof(cl_mem), (void *) &s_res));
  CL_CHECK(clSetKernelArg(kernel, 1, sizeof(cl_mem), (void *) &f_s));
  CL_CHECK(clSetKernelArg(kernel, 2, sizeof(int), n));
  
  const int nb = ((*n) + 256 - 1) / 256;
  const size_t global_item_size = 256 * nb;
  const size_t local_item_size = 256;
 
  CL_CHECK(clEnqueueNDRangeKernel((cl_command_queue) glb_cmd_queue, kernel, 1,
                                  NULL, &global_item_size, &local_item_size,
                                  0, NULL, NULL));
}