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https://github.com/fluencelabs/assemblyscript
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Is it a strawberry, see boyanio/wasm-wheel#2
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// A simplified version of the game of life as seen on http://dcode.io
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let w: u32; // width
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let h: u32; // height
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let s: u32; // total size
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/** Initializes width and height. */
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export function init(w_: u32, h_: u32): void {
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w = w_;
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h = h_;
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s = w * h;
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}
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/** Performs one step. */
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export function step(): void {
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let y: u32, ym1: u32, yp1: u32; // y, y-1 and y+1
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let x: u32, xm1: u32, xp1: u32; // x, x-1 and x+1
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let hm1: u32 = h - 1, wm1: u32 = w - 1;
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let n: u32, v: u8, c: u32 = 0;
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for (y = 0; y < h; ++y) {
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ym1 = select<u32>(hm1, y - 1, y == 0);
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yp1 = select<u32>(0, y + 1, y == hm1);
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for (x = 0; x < w; ++x) {
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xm1 = select<u32>(wm1, x - 1, x == 0);
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xp1 = select<u32>(0, x + 1, x == wm1);
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n = load<u8>(ym1 * w + xm1) + load<u8>(ym1 * w + x) + load<u8>(ym1 * w + xp1)
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+ load<u8>(y * w + xm1) + load<u8>(y * w + xp1)
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+ load<u8>(yp1 * w + xm1) + load<u8>(yp1 * w + x) + load<u8>(yp1 * w + xp1);
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v = load<u8>(y * w + x);
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if (v) {
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if (n < 2 || n > 3)
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store<u8>(s + y * w + x, 0);
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} else if (n == 3)
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store<u8>(s + y * w + x, 1);
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}
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}
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}
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// Performing a step uses bytes [0, s-1] as the input and writes the output to [s, 2*s-1].
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// Note that the code above wastes a lot of space by using one byte per cell.
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