52 lines
1.3 KiB
Text
52 lines
1.3 KiB
Text
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int program (int argc, string[] argv) {
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return cla(11, 15);
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}
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int cla(int a, int b) {
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var prop0 = propagate(((a [&] 1) == 1), ((b [&] 1) == 1));
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var prop1 = propagate(((a [&] 2) == 2), ((b [&] 2) == 2));
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var prop2 = propagate(((a [&] 4) == 4), ((b [&] 4) == 4));
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var prop3 = propagate(((a [&] 8) == 8), ((b [&] 8) == 8));
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var gen0 = generate(((a [&] 1) == 1), ((b [&] 1) == 1));
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var gen1 = generate(((a [&] 2) == 2), ((b [&] 2) == 2));
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var gen2 = generate(((a [&] 4) == 4), ((b [&] 4) == 4));
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var gen3 = generate(((a [&] 8) == 8), ((b [&] 8) == 8));
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var c1 = gen0;
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var c2 = gen1 | (gen0 & prop1);
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var c3 = gen2 | (gen0 & prop1 & prop2) | (gen1 & prop2);
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var c4 = gen3 | (gen0 & prop1 & prop2 & prop3) | (gen1 & prop2 & prop3) | (gen2 & prop3);
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var carryValues = 0;
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if (c1) {
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carryValues = carryValues [|] 2;
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}
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if (c2) {
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carryValues = carryValues [|] 4;
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}
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if (c3) {
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carryValues = carryValues [|] 8;
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}
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if (c4) {
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carryValues = carryValues [|] 16;
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}
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var x = xor(a, b);
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var r = xor(carryValues, x);
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return r;
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}
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bool propagate (bool p1, bool p2)
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{
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return p1 | p2;
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}
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bool generate (bool g1, bool g2)
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{
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return g1 & g2;
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}
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int xor (int x, int y) {
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return ~(x [&] y) [&] (x [|] y);
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}
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