icybear/fabric-carpet
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Simplify and optimize bit roll operations

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Suggested in #1666, ran many testing to check it gives the same results
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altrisi committed 2023-03-08 13:24:37 +01:00
1 parent 3f19cce649
commit 93bec37dac
2 files changed
+8 -19
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src/main/java/carpet/script/language/Operators.java
+2 -14
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@@ -315,20 +315,8 @@ public class Operators
expression.addFunctionalEquivalence("<=", "nondecreasing");
expression.addMathematicalBinaryIntFunction("bitwise_shift_left", (num, amount) -> num << amount);
expression.addMathematicalBinaryIntFunction("bitwise_shift_right", (num, amount) -> num >> amount);
expression.addMathematicalBinaryIntFunction("bitwise_roll_left", (num, num2) -> {
long amount = num2 % 64;
long amountToRoll = 64 - amount;
long rolledBits = ((-1L) >> amountToRoll) << amountToRoll;
long rolledAmount = (num & rolledBits) >> amountToRoll;
return num << amount | rolledAmount;
});
expression.addMathematicalBinaryIntFunction("bitwise_roll_right", (num, num2) -> {
long amount = num2 % 64;
long amountToRoll = 64 - amount;
long rolledBits = ((-1L) << amountToRoll) >> amountToRoll;
long rolledAmount = (num & rolledBits) << amountToRoll;
return num >> amount | rolledAmount;
});
expression.addMathematicalBinaryIntFunction("bitwise_roll_left", (num, amount) -> Long.rotateLeft(num, (int)amount));
expression.addMathematicalBinaryIntFunction("bitwise_roll_right", (num, amount) -> Long.rotateRight(num, (int)amount));
expression.addMathematicalUnaryIntFunction("bitwise_not", d -> {
long num = (long) d;
return ~num;