cuda之curand生成随机数

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头文件中需包含

#include <curand_kernel.h>

实例代码：

__global__ void generateRandom(long rand)
{
    curandState state;
    int id = threadIdx.x;
    long seed = rand;
    curand_init(seed, id, 0, &state);
    printf("random double: %f \n",abs(curand_uniform_double(&state)));
}

int main()

{

       srand((unsigned int)time(NULL));

       cudaSetDevice(0);

       generateRandom<<<1,16>>>(rand());

       cudaDeviceReset();

       return 0;

}

关于cuRAND生成随机数的详细内容，可参考官方文档http://docs.nvidia.com/cuda/curand/device-api-overview.html#axzz4g04UXoC0，其中有详细的例子解释。

生成随机数的函数例子：

curandState localState;

unsigned int x = curand(&localState);

float x = curand_uniform(&localState);

float2 x = curand_normal2(&localState);

double x = curand_uniform_double(&localState);

double x = curand_normal_double(&localState);

另cuda随机数的生成 API 为: 

1. __device__ void
2. curand_init (
3.     unsigned long long seed, unsigned long long sequence,
4.     unsigned long long offset, curandState_t *state)