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51 lines
1.1 KiB
51 lines
1.1 KiB
__kernel void helloworld(__global char* in, __global int* num_workers, __global int* grid_width, __global int* grid_height)
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{
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// Caclulate the start and end range that this worker will be calculating
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int data_length = *grid_width * *grid_height;
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int start_range = (data_length / *num_workers) * get_global_id(0) * 2; // * 2 = padding
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int end_range = (data_length / *num_workers) * (get_global_id(0) + 1) * 2;
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// x, y + 1
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int neighbors = 0;
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for (int i = start_range; i < end_range; i += 2){
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// add all 8 blocks to neghbors
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neighbors = 0;
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// Top
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neighbors += in[i - *grid_width * 2];
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// Top right
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neighbors += in[i - *grid_width * 2 + 2];
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// Right
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neighbors += in[i + 2];
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// Bottom Right
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neighbors += in[i + *grid_width * 2 + 2];
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// Bottom
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neighbors += in[i + *grid_width * 2];
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// Bottom Left
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neighbors += in[i + *grid_width * 2 - 2];
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// Left
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neighbors += in[i - 2];
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// Top left
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neighbors += in[i - *grid_width * 2 - 2];
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// push living status to the padded second char
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if (neighbors == 3 || (neighbors == 2 && in[i])){
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in[i + 1] = 1;
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}
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else
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in[i + 1] = 0;
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}
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} |