43 lines
1.2 KiB
JavaScript
Executable File
43 lines
1.2 KiB
JavaScript
Executable File
"use strict";
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var BEST={}
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var MAXBITS=17
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//MAXBITS=12
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for (var n=1; n<MAXBITS; n++) {
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var mask = (1<<n)-1;
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var hibit = (1<<(n-1));
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for (var i=0; i < (1<<n); i++) {
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for (var invert=0; invert<2; invert++) {
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var x = 1;
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var seq = [];
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var seen = new Map();
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while (x && !seen.get(x)) {
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seq.push(x);
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seen.set(x, true);
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var feedback = (x & hibit) != 0;
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x = ((x << 1) & mask);
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if (invert && !feedback) x ^= i;
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if (!invert && feedback) x ^= i;
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}
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if (x) {
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var seqindex = seq.indexOf(x);
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var seqlen = seq.length - seqindex;
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if (seqlen > 1 && x == 1) {
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if (!BEST[seqlen] || n < BEST[seqlen].n) {
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BEST[seqlen] = {n:n, i:i, invert:invert};
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//console.log(seqlen + "\t" + n + "\t" + i.toString(2) + "\t" + x.toString(2));
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}
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}
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}
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}
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}
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}
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for (var seqlen in BEST) {
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var b = BEST[seqlen];
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console.log(seqlen+" &\t@"+b.n+"'b"+b.i.toString(2)+","+b.invert+"@ \\\\");
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}
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