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16 lines
582 B
Plaintext
16 lines
582 B
Plaintext
import "env.memory" memory(4);
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import "env.random" fn random() -> i32;
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export fn upd() {
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let i: i32;
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loop pixels {
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let inline left = i32.load8_u((i + (320*240 - 319)) % (320*240), 120);
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let inline top = i32.load8_u((i + 320*239) % (320*240), 120, 0);
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let inline here = i32.load16_u(i, 119);
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let inline all = (left << 24) | (top << 16) | here;
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let lazy r = random();
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let inline new = (all #>> ((r & 3) * 8)) ^ ((r & 31) * !(r #>> 22));
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i32.store8(new, i, 120);
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branch_if (i := i + 1) < 320*240: pixels;
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}
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} |