69 lines
1.7 KiB
JavaScript
69 lines
1.7 KiB
JavaScript
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
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//#region src/generator/xorshift128plus.ts
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var XorShift128Plus = class XorShift128Plus {
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constructor(s01, s00, s11, s10) {
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this.s01 = s01;
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this.s00 = s00;
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this.s11 = s11;
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this.s10 = s10;
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}
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clone() {
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return new XorShift128Plus(this.s01, this.s00, this.s11, this.s10);
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}
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next() {
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const a0 = this.s00 ^ this.s00 << 23;
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const a1 = this.s01 ^ (this.s01 << 23 | this.s00 >>> 9);
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const b0 = a0 ^ this.s10 ^ (a0 >>> 18 | a1 << 14) ^ (this.s10 >>> 5 | this.s11 << 27);
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const b1 = a1 ^ this.s11 ^ a1 >>> 18 ^ this.s11 >>> 5;
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const out = this.s00 + this.s10 | 0;
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this.s01 = this.s11;
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this.s00 = this.s10;
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this.s11 = b1;
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this.s10 = b0;
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return out;
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}
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jump() {
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let ns01 = 0;
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let ns00 = 0;
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let ns11 = 0;
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let ns10 = 0;
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const jump = [
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1667051007,
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2321340297,
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1548169110,
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304075285
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];
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for (let i = 0; i !== 4; ++i) for (let mask = 1; mask; mask <<= 1) {
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if (jump[i] & mask) {
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ns01 ^= this.s01;
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ns00 ^= this.s00;
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ns11 ^= this.s11;
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ns10 ^= this.s10;
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}
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this.next();
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}
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this.s01 = ns01;
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this.s00 = ns00;
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this.s11 = ns11;
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this.s10 = ns10;
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}
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getState() {
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return [
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this.s01,
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this.s00,
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this.s11,
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this.s10
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];
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}
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};
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function xorshift128plusFromState(state) {
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if (!(state.length === 4)) throw new Error("The state must have been produced by a xorshift128plus RandomGenerator");
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return new XorShift128Plus(state[0], state[1], state[2], state[3]);
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}
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function xorshift128plus(seed) {
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return new XorShift128Plus(-1, ~seed, seed | 0, 0);
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}
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//#endregion
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exports.xorshift128plus = xorshift128plus;
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exports.xorshift128plusFromState = xorshift128plusFromState;
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