62 lines
No EOL
1.4 KiB
Text
62 lines
No EOL
1.4 KiB
Text
struct Adder {
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bool prop;
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bool gen
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}
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int program (int argc, string[] argv) {
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return cla(11, 20);
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}
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int cla(int a, int b) {
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var a0 = new Adder {prop = (propagate(((a [&] 1) == 1), ((b [&] 1) == 1)));
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gen = generate(((a [&] 1) == 1), ((b [&] 1) == 1))};
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var a1 = new Adder {prop = propagate(((a [&] 2) == 2), ((b [&] 2) == 2));
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gen = generate(((a [&] 2) == 2), ((b [&] 2) == 2)) };
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var a2 = new Adder {prop = propagate(((a [&] 4) == 4), ((b [&] 4) == 4));
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gen = generate(((a [&] 4) == 4), ((b [&] 4) == 4)) };
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var a3 = new Adder {prop = propagate(((a [&] 8) == 8), ((b [&] 8) == 8));
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gen = generate(((a [&] 8) == 8), ((b [&] 8) == 8))};
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var c1 = a0.gen;
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var c2 = a1.gen | (a0.gen & a1.prop);
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var c3 = a2.gen | (a0.gen & a1.prop & a2.prop) | (a1.gen & a2.prop);
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var c4 = a3.gen | (a0.gen & a1.prop & a2.prop & a3.prop) | (a1.gen & a2.prop & a3.prop) | (a2.gen & a3.prop);
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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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} |