Changes

Algo holics

14 bytes added, 03:00, 8 April 2019

→‎Kernel Version 2

int i = blockIdx.y * blockDim.y + threadIdx.y;

if(i<n && j<n){

angle = pi * ( double ) ( i * ( 2 * j + 1 ) ) / ( double ) ( 2 * n );

double value = cos ( angle ) * a[j];

b[i] = atomicAdd(&b[i], value);

}

int main (int argc, char* argv[] ){

if (argc != 2) {

//copy randomly generated values from host to device

for(int i=0; i<n; i++)

s[i]=0.0;

cudaMemcpy(d_a,r,sizeof(double)*n,cudaMemcpyHostToDevice);

cudaMemcpy(d_b,s,sizeof(double)*n,cudaMemcpyHostToDevice);

57

edits