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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.social/users/whitequark/statuses/111625403572958340">✧✦✶✷Catherine✷✶✦✧ (whitequark@mastodon.social)'s status on Saturday, 23-Dec-2023 03:21:59 JST</a><a href="https://mastodon.social/@whitequark" title="whitequark@mastodon.social"><img src="https://gnusocial.jp/avatar/105710-48-20230309163231.webp" width="48" height="48" alt="✧✦✶✷Catherine✷✶✦✧" style="position: absolute; left: 0; top: 0;">✧✦✶✷Catherine✷✶✦✧</a><div><a href="https://mastodon.social/@whitequark/111625332270627538" rel="in-reply-to">in reply to</a></div></section><article><p>nevermind it was faster to port it than to dig something useful out of npm</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/2487662#notice-4921945">In conversation</a><time datetime="2023-12-23T03:21:59+09:00" title="Saturday, 23-Dec-2023 03:21:59 JST">about a year ago</time> <span>from <span><a href="https://mastodon.social/@whitequark/111625403572958340" rel="external" title="Sent from mastodon.social via ActivityPub">mastodon.social</a></span></span><a href="https://mastodon.social/@whitequark/111625403572958340">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/2004816">class Xoroshiro128StarStar {
	constructor(seed = 1n) {
		if (BigInt(seed) === 0n) {
			throw new Error("xoroshiro128** must be seeded with a non-zero state")
		}
		this.s = [BigInt(seed) &amp; 0xffffffffffffffffn, (BigInt(seed) &gt;&gt; 64n) &amp; 0xffffffffffffffffn];
	}	next() {
		function trunc64(x) { return x &amp; 0xffffffffffffffffn; }
		function rotl(x, k) { return (x &lt;&lt; k) | (x &gt;&gt; (64n - k)); }		let [s0, s1] = this.s;
		const r = trunc64(rotl(s0 * 5n, 7n) * 9n);
		s1 ^= s0;
		s0 = trunc64(rotl(s0, 24n) ^ s1 ^ (s1 &lt;&lt; 16n));
		s1 = trunc64(rotl(s1, 37n));
		this.s = [s0, s1];
		return r;
	}
}</a></label><br><a href="https://files.mastodon.social/media_attachments/files/111/625/402/790/225/715/original/f9214ab935f52935.png" rel="external">https://files.mastodon.social/media_attachments/files/111/625/402/790/225/715/original/f9214ab935f52935.png</a></li></ol></footer></blockquote>

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✧✦✶✷Catherine✷✶✦✧ (whitequark@mastodon.social)'s status on Saturday, 23-Dec-2023 03:21:59 JST ✧✦✶✷Catherine✷✶✦✧
in reply to
nevermind it was faster to port it than to dig something useful out of npm
In conversationabout a year ago from mastodon.socialpermalink
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1. class Xoroshiro128StarStar { constructor(seed = 1n) { if (BigInt(seed) === 0n) { throw new Error("xoroshiro128** must be seeded with a non-zero state") } this.s = [BigInt(seed) & 0xffffffffffffffffn, (BigInt(seed) >> 64n) & 0xffffffffffffffffn]; } next() { function trunc64(x) { return x & 0xffffffffffffffffn; } function rotl(x, k) { return (x << k) | (x >> (64n - k)); } let [s0, s1] = this.s; const r = trunc64(rotl(s0 * 5n, 7n) * 9n); s1 ^= s0; s0 = trunc64(rotl(s0, 24n) ^ s1 ^ (s1 << 16n)); s1 = trunc64(rotl(s1, 37n)); this.s = [s0, s1]; return r; } }
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