85 lines
3.6 KiB
JavaScript
85 lines
3.6 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.add5L = exports.add5H = exports.add4H = exports.add4L = exports.add3H = exports.add3L = exports.rotlBL = exports.rotlBH = exports.rotlSL = exports.rotlSH = exports.rotr32L = exports.rotr32H = exports.rotrBL = exports.rotrBH = exports.rotrSL = exports.rotrSH = exports.shrSL = exports.shrSH = exports.toBig = void 0;
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exports.fromBig = fromBig;
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exports.split = split;
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exports.add = add;
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const U32_MASK64 = /* @__PURE__ */ BigInt(2 ** 32 - 1);
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const _32n = /* @__PURE__ */ BigInt(32);
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// We are not using BigUint64Array, because they are extremely slow as per 2022
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function fromBig(n, le = false) {
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if (le)
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return { h: Number(n & U32_MASK64), l: Number((n >> _32n) & U32_MASK64) };
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return { h: Number((n >> _32n) & U32_MASK64) | 0, l: Number(n & U32_MASK64) | 0 };
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}
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function split(lst, le = false) {
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let Ah = new Uint32Array(lst.length);
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let Al = new Uint32Array(lst.length);
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for (let i = 0; i < lst.length; i++) {
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const { h, l } = fromBig(lst[i], le);
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[Ah[i], Al[i]] = [h, l];
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}
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return [Ah, Al];
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}
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const toBig = (h, l) => (BigInt(h >>> 0) << _32n) | BigInt(l >>> 0);
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exports.toBig = toBig;
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// for Shift in [0, 32)
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const shrSH = (h, _l, s) => h >>> s;
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exports.shrSH = shrSH;
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const shrSL = (h, l, s) => (h << (32 - s)) | (l >>> s);
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exports.shrSL = shrSL;
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// Right rotate for Shift in [1, 32)
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const rotrSH = (h, l, s) => (h >>> s) | (l << (32 - s));
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exports.rotrSH = rotrSH;
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const rotrSL = (h, l, s) => (h << (32 - s)) | (l >>> s);
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exports.rotrSL = rotrSL;
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// Right rotate for Shift in (32, 64), NOTE: 32 is special case.
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const rotrBH = (h, l, s) => (h << (64 - s)) | (l >>> (s - 32));
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exports.rotrBH = rotrBH;
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const rotrBL = (h, l, s) => (h >>> (s - 32)) | (l << (64 - s));
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exports.rotrBL = rotrBL;
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// Right rotate for shift===32 (just swaps l&h)
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const rotr32H = (_h, l) => l;
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exports.rotr32H = rotr32H;
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const rotr32L = (h, _l) => h;
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exports.rotr32L = rotr32L;
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// Left rotate for Shift in [1, 32)
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const rotlSH = (h, l, s) => (h << s) | (l >>> (32 - s));
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exports.rotlSH = rotlSH;
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const rotlSL = (h, l, s) => (l << s) | (h >>> (32 - s));
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exports.rotlSL = rotlSL;
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// Left rotate for Shift in (32, 64), NOTE: 32 is special case.
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const rotlBH = (h, l, s) => (l << (s - 32)) | (h >>> (64 - s));
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exports.rotlBH = rotlBH;
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const rotlBL = (h, l, s) => (h << (s - 32)) | (l >>> (64 - s));
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exports.rotlBL = rotlBL;
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// JS uses 32-bit signed integers for bitwise operations which means we cannot
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// simple take carry out of low bit sum by shift, we need to use division.
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function add(Ah, Al, Bh, Bl) {
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const l = (Al >>> 0) + (Bl >>> 0);
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return { h: (Ah + Bh + ((l / 2 ** 32) | 0)) | 0, l: l | 0 };
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}
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// Addition with more than 2 elements
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const add3L = (Al, Bl, Cl) => (Al >>> 0) + (Bl >>> 0) + (Cl >>> 0);
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exports.add3L = add3L;
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const add3H = (low, Ah, Bh, Ch) => (Ah + Bh + Ch + ((low / 2 ** 32) | 0)) | 0;
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exports.add3H = add3H;
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const add4L = (Al, Bl, Cl, Dl) => (Al >>> 0) + (Bl >>> 0) + (Cl >>> 0) + (Dl >>> 0);
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exports.add4L = add4L;
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const add4H = (low, Ah, Bh, Ch, Dh) => (Ah + Bh + Ch + Dh + ((low / 2 ** 32) | 0)) | 0;
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exports.add4H = add4H;
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const add5L = (Al, Bl, Cl, Dl, El) => (Al >>> 0) + (Bl >>> 0) + (Cl >>> 0) + (Dl >>> 0) + (El >>> 0);
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exports.add5L = add5L;
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const add5H = (low, Ah, Bh, Ch, Dh, Eh) => (Ah + Bh + Ch + Dh + Eh + ((low / 2 ** 32) | 0)) | 0;
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exports.add5H = add5H;
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// prettier-ignore
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const u64 = {
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fromBig, split, toBig,
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shrSH, shrSL,
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rotrSH, rotrSL, rotrBH, rotrBL,
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rotr32H, rotr32L,
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rotlSH, rotlSL, rotlBH, rotlBL,
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add, add3L, add3H, add4L, add4H, add5H, add5L,
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};
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exports.default = u64;
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//# sourceMappingURL=_u64.js.map
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