Exercise 3 for the course "Parallel and distributed systems" of THMMY in AUTH university.
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#include "meanshift_kernels.h"
#include <stdio.h>
__global__ void multiply_kernel(Matrix matrix1, Matrix matrix2, Matrix output){
// Each thread computes one element of output
// by accumulating results into cell_value
double cell_value = 0;
int row = blockIdx.y * blockDim.y + threadIdx.y;
int col = blockIdx.x * blockDim.x + threadIdx.x;
if (row < output.height && col < output.width){
for (int element_index = 0; element_index < matrix1.width; ++element_index){
cell_value += matrix1.elements[row * matrix1.width + element_index]
* matrix2.elements[element_index * matrix2.width + col];
}
printf("%f\n", cell_value);
output.elements[row * output.width + col] = cell_value;
}
}