Data update

Task/Pseudo-random-numbers-Xorshift-star/JavaScript/pseudo-random-numbers-xorshift-star.js

@@ -0,0 +1,34 @@
+class Xorshift_star {
+	constructor(seed) {
+		this.state = BigInt(seed);
+		this.k = 0x2545F4914F6CDD1Dn;
+		this.mask64 = (1n << 64n) - 1n;
+		this.mask32 = (1n << 32n) - 1n;
+	}
+	
+	next_int() {
+		let x = this.state & this.mask64;
+		x = x ^ (x >> 12n) & this.mask64;
+		x = x ^ (x << 25n) & this.mask64;
+		x = x ^ (x >> 27n) & this.mask64;
+		this.state = x;
+		return Number((x * this.k) >> 32n & this.mask32);
+	}
+	
+	next_float() {
+		return this.next_int() / (2 ** 32);
+	}
+}
+
+const random_gen = new Xorshift_star(1234567);
+for (let i = 0; i < 5; i++) {
+	console.log(random_gen.next_int());
+}
+
+const random_gen2 = new Xorshift_star(987654321);
+let counts = Array(5).fill(0);
+for (let i = 0; i < 100000; i++) {
+	const res = Math.floor(random_gen2.next_float() * 5);
+	counts[res]++;
+}
+console.log(counts);