A three-way jump: one compare, three targets

Compare two registers once and jump on the trit: less, equal or greater. A binary machine needs two tests for the same branch.

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Where the numbers come from

gHashTag/t27 specs/ternary/trits.t27 (t27#8979): every value on the page is its fn bodies, compiled to wasm (logic.js), with 18 tests and 4108 runtime asserts
N. P. Brusentsov and others, the Setun computer, Moscow State University, 1958: a working balanced-ternary machine