text: //
  // Copyright (c) 2017 The Khronos Group Inc.
  // 
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //    http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  //
  #include "../../test_common/harness/compat.h"
  
  #include <stdio.h>
  #include <string.h>
  #include <sys/types.h>
  #include <sys/stat.h>
  
  #include "procs.h"
  
  static const char *fmax_kernel_code =
      "__kernel void test_fmax(__global float *srcA, __global float *srcB, __global float *dst)\n"
      "{\n"
      "    int  tid = get_global_id(0);\n"
      "    dst[tid] = fmax(srcA[tid], srcB[tid]);\n"
      "}\n";
  
  static const char *fmax2_kernel_code =
      "__kernel void test_fmax2(__global float2 *srcA, __global float2 *srcB, __global float2 *dst)\n"
      "{\n"
      "    int  tid = get_global_id(0);\n"
      "    dst[tid] = fmax(srcA[tid], srcB[tid]);\n"
      "}\n";
  
  static const char *fmax4_kernel_code =
      "__kernel void test_fmax4(__global float4 *srcA, __global float4 *srcB, __global float4 *dst)\n"
      "{\n"
      "    int  tid = get_global_id(0);\n"
      "    dst[tid] = fmax(srcA[tid], srcB[tid]);\n"
      "}\n";
  
  static const char *fmax8_kernel_code =
      "__kernel void test_fmax8(__global float8 *srcA, __global float8 *srcB, __global float8 *dst)\n"
      "{\n"
      "    int  tid = get_global_id(0);\n"
      "    dst[tid] = fmax(srcA[tid], srcB[tid]);\n"
      "}\n";
  
  static const char *fmax16_kernel_code =
      "__kernel void test_fmax16(__global float16 *srcA, __global float16 *srcB, __global float16 *dst)\n"
      "{\n"
      "    int  tid = get_global_id(0);\n"
      "    dst[tid] = fmax(srcA[tid], srcB[tid]);\n"
      "}\n";
  
  
  static const char *fmax3_kernel_code =
      "__kernel void test_fmax3(__global float *srcA, __global float *srcB, __global float *dst)\n"
      "{\n"
      "    int  tid = get_global_id(0);\n"
      "    vstore3(fmax(vload3(tid,srcA), vload3(tid,srcB)),tid,dst);\n"
      "}\n";
  
  static int
  verify_fmax(float *inptrA, float *inptrB, float *outptr, int n)
  {
      float       r;
      int         i;
  
      for (i=0; i<n; i++)
      {
          r = (inptrA[i] >= inptrB[i]) ? inptrA[i] : inptrB[i];
          if (r != outptr[i])
          return -1;
      }
  
      return 0;
  }
  
  int
  test_fmax(cl_device_id device, cl_context context, cl_command_queue queue, int n_elems)
  {
      cl_mem       streams[3];
      cl_float     *input_ptr[2], *output_ptr, *p;
      cl_program   *program;
      cl_kernel    *kernel;
      void        *values[3];
      size_t  threads[1];
      int num_elements;
      int err;
      int i;
      MTdata d;
  
      program = (cl_program*)malloc(sizeof(cl_program)*kTotalVecCount);
      kernel = (cl_kernel*)malloc(sizeof(cl_kernel)*kTotalVecCount);
  
      num_elements = n_elems * (1 << (kTotalVecCount-1));
  
      input_ptr[0] = (cl_float*)malloc(sizeof(cl_float) * num_elements);
      input_ptr[1] = (cl_float*)malloc(sizeof(cl_float) * num_elements);
      output_ptr = (cl_float*)malloc(sizeof(cl_float) * num_elements);
      streams[0] = clCreateBuffer( context, (cl_mem_flags)(CL_MEM_READ_WRITE),  sizeof(cl_float) * num_elements, NULL, NULL );
      if (!streams[0])
      {
          log_error("clCreateBuffer failed\n");
          return -1;
      }
      streams[1] = clCreateBuffer( context, (cl_mem_flags)(CL_MEM_READ_WRITE),  sizeof(cl_float) * num_elements, NULL, NULL );
      if (!streams[1])
      {
          log_error("clCreateBuffer failed\n");
          return -1;
      }
      streams[2] = clCreateBuffer( context, (cl_mem_flags)(CL_MEM_READ_WRITE),  sizeof(cl_float) * num_elements, NULL, NULL );
      if (!streams[2])
      {
          log_error("clCreateBuffer failed\n");
          return -1;
      }
  
      d = init_genrand( gRandomSeed );
      p = input_ptr[0];
      for (i=0; i<num_elements; i++)
      {
          p[i] = get_random_float(-0x20000000, 0x20000000, d);
      }
      p = input_ptr[1];
      for (i=0; i<num_elements; i++)
      {
          p[i] = get_random_float(-0x20000000, 0x20000000,d );
      }
      free_mtdata(d); d = NULL;
  
      err = clEnqueueWriteBuffer( queue, streams[0], true, 0, sizeof(cl_float)*num_elements, (void *)input_ptr[0], 0, NULL, NULL );
      if (err != CL_SUCCESS)
      {
          log_error("clWriteArray failed\n");
          return -1;
      }
      err = clEnqueueWriteBuffer( queue, streams[1], true, 0, sizeof(cl_float)*num_elements, (void *)input_ptr[1], 0, NULL, NULL );
      if (err != CL_SUCCESS)
      {
          log_error("clWriteArray failed\n");
          return -1;
      }
  
      err = create_single_kernel_helper( context, &program[0], &kernel[0], 1, &fmax_kernel_code, "test_fmax" );
      if (err)
      return -1;
      err = create_single_kernel_helper( context, &program[1], &kernel[1], 1, &fmax2_kernel_code, "test_fmax2" );
      if (err)
      return -1;
      err = create_single_kernel_helper( context, &program[2], &kernel[2], 1, &fmax4_kernel_code, "test_fmax4" );
      if (err)
      return -1;
      err = create_single_kernel_helper( context, &program[3], &kernel[3], 1, &fmax8_kernel_code, "test_fmax8" );
      if (err)
      return -1;
      err = create_single_kernel_helper( context, &program[4], &kernel[4], 1, &fmax16_kernel_code, "test_fmax16" );
      if (err)
      return -1;
      err = create_single_kernel_helper( context, &program[5], &kernel[5], 1, &fmax3_kernel_code, "test_fmax3" );
      if (err)
      return -1;
  
  
      values[0] = streams[0];
      values[1] = streams[1];
      values[2] = streams[2];
      for (i=0; i < kTotalVecCount; i++)
      {
          err = clSetKernelArg(kernel[i], 0, sizeof streams[0], &streams[0] );
          err |= clSetKernelArg(kernel[i], 1, sizeof streams[1], &streams[1] );
          err |= clSetKernelArg(kernel[i], 2, sizeof streams[2], &streams[2] );
          if (err != CL_SUCCESS)
          {
              log_error("clSetKernelArgs failed\n");
              return -1;
          }
      }
  
      threads[0] = (size_t)n_elems;
      for (i=0; i < kTotalVecCount; i++)
      {
          err = clEnqueueNDRangeKernel( queue, kernel[i], 1, NULL, threads, NULL, 0, NULL, NULL );
          if (err != CL_SUCCESS)
          {
              log_error("clEnqueueNDRangeKernel failed\n");
              return -1;
          }
  
          err = clEnqueueReadBuffer( queue, streams[2], true, 0, sizeof(cl_float)*num_elements, output_ptr, 0, NULL, NULL );
          if (err != CL_SUCCESS)
          {
              log_error("clEnqueueReadBuffer failed\n");
              return -1;
          }
  
          if (verify_fmax(input_ptr[0], input_ptr[1], output_ptr, n_elems*((g_arrVecSizes[i]))))
          {
              log_error("FMAX float%d test failed\n", (g_arrVecSizes[i]));
              err = -1;
          }
          else
          {
              log_info("FMAX float%d test passed\n", (g_arrVecSizes[i]));
              err = 0;
          }
  
          if (err)
          break;
      }
  
      clReleaseMemObject(streams[0]);
      clReleaseMemObject(streams[1]);
      clReleaseMemObject(streams[2]);
      for (i=0; i < kTotalVecCount; i++)
      {
          clReleaseKernel(kernel[i]);
          clReleaseProgram(program[i]);
      }
      free(program);
      free(kernel);
      free(input_ptr[0]);
      free(input_ptr[1]);
      free(output_ptr);
  
      return err;
  }
  
  
  