gdb/testsuite/gdb.rocm/multi-func.cpp

   1 #include <stdio.h>
   2 #include <iostream>
   3 #include "hip/hip_runtime.h"
   4
   5 #define CHECK(cmd)                                                                                 \
   6     {                                                                                              \
   7         hipError_t error = cmd;                                                                    \
   8         if (error != hipSuccess) {                                                                 \
   9             fprintf(stderr, "error: '%s'(%d) at %s:%d\n", hipGetErrorString(error), error,         \
  10                     __FILE__, __LINE__);                                                           \
  11             exit(EXIT_FAILURE);                                                                    \
  12         }                                                                                          \
  13     }
  14
  15 // Defining number of elements in Array
  16 #define N 5
  17
  18 __device__ int add_one(int no) {
  19     return no + 1;
  20 }
  21
  22 __device__ int multiply_two(int no) {
  23     no = no*2;
  24     return no;
  25 }
  26
  27 __device__ int multiply_three(int no) {
  28     no = no*3;
  29     return no;
  30 }
  31
  32 //c = a*2 + b*3 + 1;
  33 __device__ int gpu_operations(int a,int b) {
  34     int c;
  35     c = multiply_two(a) + multiply_three(b);
  36     c = add_one(c);
  37     return c;
  38 }
  39
  40 __global__ void gpu_kernel_operations(int *d_a, int *d_b, int *d_c) {
  41     // Getting block index of current kernel
  42     int tid = blockIdx.x; // handle the data at this index
  43     if (tid < N)
  44         d_c[tid] = gpu_operations(d_a[tid],d_b[tid]);
  45 }
  46
  47 int main(void) {
  48     // Defining host arrays
  49     int h_a[N], h_b[N], h_c[N];
  50     // Defining device pointers
  51     int *d_a, *d_b, *d_c;
  52     // allocate the memory
  53     CHECK(hipMalloc((void**)&d_a, N * sizeof(int)));
  54     CHECK(hipMalloc((void**)&d_b, N * sizeof(int)));
  55     CHECK(hipMalloc((void**)&d_c, N * sizeof(int)));
  56
  57     // Initializing Arrays
  58     for (int i = 0; i < N; i++) {
  59         h_a[i] = i;
  60         h_b[i] = i + 1;
  61     }
  62
  63     // Copy input arrays from host to device memory
  64     CHECK(hipMemcpy(d_a, h_a, N * sizeof(int), hipMemcpyHostToDevice));
  65     CHECK(hipMemcpy(d_b, h_b, N * sizeof(int), hipMemcpyHostToDevice));
  66
  67     // Calling kernels with N blocks and one thread per block, passing
  68     // device pointers as parameters
  69     hipLaunchKernelGGL(gpu_kernel_operations, dim3(N), dim3(1 ), 0, 0, d_a, d_b, d_c);
  70
  71     // Copy result back to host memory from device memory
  72     CHECK(hipMemcpy(h_c, d_c, N * sizeof(int), hipMemcpyDeviceToHost));
  73
  74     // Printing result on console
  75     for (int i = 0; i < N; i++) {
  76         if (h_c[i] !=  h_a[i]*2 + h_b[i]*3 + 1) {
  77             fprintf(stderr, "ERROR: wrong result of %d element is %d*2 + %d*3 + 1 = %d\n",
  78                    i, h_a[i], h_b[i],h_c[i]);
  79             exit(EXIT_FAILURE);
  80         }
  81     }
  82     // Free up memory
  83     CHECK(hipFree(d_a));
  84     CHECK(hipFree(d_b));
  85     CHECK(hipFree(d_c));
  86     return 0;
  87 }
  88