Changes

Algo holics

16 bytes added, 01:58, 8 April 2019

→‎Kernel 2

double atomicAdd(double* address, double value)

=====Kernel Version 2=====

{| class="wikitable mw-collapsible mw-collapsed"

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);

}

//square root of the whole cos transformed row term

if(j==n-1 && i<n){

b[i] *= sqrt ( 2.0 / ( double ) ( n ) );

}

57

edits