7 lines
315 B
Plaintext
7 lines
315 B
Plaintext
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// Two-bit window lookup table using one constraint
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// Maps the bits `b` to a list of field elements `c`
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def main(bool[2] b, field[4] c) -> field {
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field alpha = c[1] - c[0] + (b[1] ? (c[3] - c[2] - c[1] + c[0]) : 0);
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field out = (b[0] ? alpha : 0) + c[0] - (b[1] ? (0 - c[2] + c[0]) : 0);
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return out;
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}
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