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Add support for pow (^) #16
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42 changes: 42 additions & 0 deletions
42
src/main/java/com/oracle/truffle/sl/nodes/expression/SLPowNode.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| /* | ||
| * To change this license header, choose License Headers in Project Properties. | ||
| * To change this template file, choose Tools | Templates | ||
| * and open the template in the editor. | ||
| */ | ||
| package com.oracle.truffle.sl.nodes.expression; | ||
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| import com.oracle.truffle.api.CompilerDirectives; | ||
| import com.oracle.truffle.api.dsl.Specialization; | ||
| import com.oracle.truffle.api.nodes.NodeInfo; | ||
| import com.oracle.truffle.api.profiles.BranchProfile; | ||
| import com.oracle.truffle.sl.nodes.SLBinaryNode; | ||
| import java.math.BigDecimal; | ||
| import java.math.BigInteger; | ||
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| /** | ||
| * Performs the "^" operation - returns the value of the first argument | ||
| * raised to the power of the second argument. | ||
| */ | ||
| @NodeInfo(shortName = "^") | ||
| public abstract class SLPowNode extends SLBinaryNode { | ||
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| private final BranchProfile bigNumbers = BranchProfile.create(); | ||
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| @Specialization(rewriteOn = ArithmeticException.class) | ||
| protected long pow(long left, long right) { | ||
| double pow = Math.pow(left, right); | ||
| if (pow > Long.MAX_VALUE) { | ||
| bigNumbers.enter(); | ||
| throw new ArithmeticException(); | ||
| } | ||
| return (long) pow; | ||
| } | ||
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| @Specialization | ||
| @CompilerDirectives.TruffleBoundary | ||
| protected BigInteger pow(BigInteger left, BigInteger right) { | ||
| return new BigDecimal(Math.pow(left.doubleValue(), right.doubleValue())).toBigIntegerExact(); | ||
| } | ||
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| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| /* | ||
| * To change this license header, choose License Headers in Project Properties. | ||
| * To change this template file, choose Tools | Templates | ||
| * and open the template in the editor. | ||
| */ | ||
| package com.oracle.truffle.sl.test; | ||
|
|
||
| import com.oracle.truffle.api.interop.UnsupportedTypeException; | ||
| import com.oracle.truffle.api.source.Source; | ||
| import com.oracle.truffle.api.vm.PolyglotEngine; | ||
| import java.math.BigDecimal; | ||
| import org.junit.After; | ||
| import org.junit.Assert; | ||
| import org.junit.Before; | ||
| import org.junit.Test; | ||
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| import static org.junit.Assert.assertEquals; | ||
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| public class SLPowTest { | ||
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| private PolyglotEngine engine; | ||
| private PolyglotEngine.Value pow; | ||
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| @Before | ||
| public void initEngine() throws Exception { | ||
| engine = PolyglotEngine.newBuilder().build(); | ||
| engine.eval( | ||
| Source.newBuilder("\n" | ||
| + "function pow(a, b) {\n" | ||
| + " return a ^ b;\n" | ||
| + "}\n"). | ||
| name("pow.sl"). | ||
| mimeType("application/x-sl"). | ||
| build() | ||
| ); | ||
| pow = engine.findGlobalSymbol("pow"); | ||
| } | ||
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| @After | ||
| public void dispose() { | ||
| engine.dispose(); | ||
| } | ||
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| @Test | ||
| public void powOf2And2() throws Exception { | ||
| Number ret = pow.execute(2, 2).as(Number.class); | ||
| assertEquals(4, ret.intValue()); | ||
| } | ||
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| @Test | ||
| public void pow2And3() throws Exception { | ||
| Number ret = pow.execute(2, 3).as(Number.class); | ||
| assertEquals(8, ret.intValue()); | ||
| } | ||
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| @Test | ||
| public void powBigIntegers() throws Exception { | ||
| Number ret = pow.execute(Long.MAX_VALUE, 2).as(Number.class); | ||
| assertEquals(new BigDecimal(Math.pow(Long.MAX_VALUE, 2)).toBigIntegerExact(), ret); | ||
| } | ||
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| @Test | ||
| public void pow2AndString() throws Exception { | ||
| Exception exc = null; | ||
| try { | ||
| pow.execute(2, "test"); | ||
| Assert.fail("should not get here"); | ||
| } catch (RuntimeException ex) { | ||
| Throwable cause = ex.getCause(); | ||
| Assert.assertTrue(cause.getClass().getName(), cause instanceof UnsupportedTypeException); | ||
| exc = ex; | ||
| } | ||
| Assert.assertNotNull(exc); | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| function main() { | ||
| println(2 ^ 2); | ||
| println(2 ^ 3); | ||
| println(2 ^ 2 ^ 2); | ||
| println(3 + 2 ^ 2); | ||
| println(6465467984651316454646 ^ 4); | ||
| //println(2 ^ "test"); | ||
| //println(6465467984651316454646 ^ "test"); | ||
| } |
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Wrong license header.