Can the following program be written in CUDA 9.0 using generic vector<>
types instead of raw dynamic arrays?
#include <vector>
#include <iostream>
__global__ void addVectors(float *a, float *b, float *c, int n) {
// Calculate the global thread ID
int tid = blockIdx.x * blockDim.x + threadIdx.x;
// Make sure we don't go out of bounds
if (tid < n) {
// Add the corresponding elements of a and b and store the result in c
c[tid] = a[tid] + b[tid];
}
}
int main() {
int n = 1024;
// Use vectors instead of raw pointers
std::vector<float> a(n), b(n), c(n);
// Initialize the input vectors
for (int i = 0; i < n; i++) {
a[i] = i;
b[i] = i * i;
}
// Allocate memory on the GPU
float* d_a, *d_b, *d_c;
cudaMalloc(&d_a, a.size() * sizeof(float));
cudaMalloc(&d_b, b.size() * sizeof(float));
cudaMalloc(&d_c, c.size() * sizeof(float));
// Copy vectors to GPU
cudaMemcpy(d_a, a.data(), a.size() * sizeof(float), cudaMemcpyHostToDevice);
// Similar for b and c
// Launch kernel
addVectors<<<1, 1024>>>(d_a, d_b, d_c, n);
// Copy result back from GPU
cudaMemcpy(c.data(), d_c, c.size() * sizeof(float),cudaMemcpyDeviceToHost);
// Free GPU memory
cudaFree(d_a);
cudaFree(d_b);
cudaFree(d_c);
// Print first 10 elements
for (int i = 0; i < 10; i++) {
std::cout << c[i] << '\n';
}
}
I want to replace *d_a
, *d_b
, and *d_c
with generic types.
How can I do that?