CUDA:实现归并排序
以下是一个使用CUDA实现归并排序的示例代码:
#include <iostream>
#include <cuda_runtime_api.h>
#define BLOCK_SIZE 256
// CUDA核函数:归并排序
__global__ void mergeSort(int* data, int* temp, int left, int right) {
int start = left + blockIdx.x * blockDim.x + threadIdx.x;
int end = min(start + blockDim.x, right);
if (start < right) {
// 拷贝数据到临时数组
temp[start] = data[start];
__syncthreads();
// 归并排序
for (int stride = 1; stride < blockDim.x; stride *= 2) {
int index = 2 * stride * threadIdx.x;
if (index < blockDim.x) {
int left = start + index;
int right = min(start + 2 * stride, end);