/* * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package org.graalvm.compiler.nodes.test; import static org.graalvm.compiler.core.test.GraalCompilerTest.getInitialOptions; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import jdk.vm.ci.meta.JavaConstant; import jdk.vm.ci.meta.JavaKind; import org.junit.Before; import org.junit.Test; import org.graalvm.compiler.core.common.type.ArithmeticOpTable.IntegerConvertOp; import org.graalvm.compiler.core.common.type.ArithmeticOpTable.ShiftOp; import org.graalvm.compiler.core.common.type.IntegerStamp; import org.graalvm.compiler.core.common.type.Stamp; import org.graalvm.compiler.core.common.type.StampFactory; import org.graalvm.compiler.nodes.ConstantNode; import org.graalvm.compiler.nodes.StructuredGraph; import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; /** * This class tests that integer stamps are created correctly for constants. */ public class IntegerStampTest { private StructuredGraph graph; private static Stamp addIntStamp(Stamp a, Stamp b) { return IntegerStamp.OPS.getAdd().foldStamp(a, b); } @Before public void before() { graph = new StructuredGraph.Builder(getInitialOptions(), AllowAssumptions.YES).build(); } @Test public void testBooleanConstant() { assertEquals(IntegerStamp.create(32, 1, 1, 0x1, 0x1), ConstantNode.forBoolean(true, graph).stamp()); assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forBoolean(false, graph).stamp()); } @Test public void testByteConstant() { assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forByte((byte) 0, graph).stamp()); assertEquals(IntegerStamp.create(32, 16, 16, 0x10, 0x10), ConstantNode.forByte((byte) 16, graph).stamp()); assertEquals(IntegerStamp.create(32, -16, -16, 0xfffffff0L, 0xfffffff0L), ConstantNode.forByte((byte) -16, graph).stamp()); assertEquals(IntegerStamp.create(32, 127, 127, 0x7f, 0x7f), ConstantNode.forByte((byte) 127, graph).stamp()); assertEquals(IntegerStamp.create(32, -128, -128, 0xffffff80L, 0xffffff80L), ConstantNode.forByte((byte) -128, graph).stamp()); } @Test public void testShortConstant() { assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forShort((short) 0, graph).stamp()); assertEquals(IntegerStamp.create(32, 128, 128, 0x80, 0x80), ConstantNode.forShort((short) 128, graph).stamp()); assertEquals(IntegerStamp.create(32, -128, -128, 0xffffff80L, 0xffffff80L), ConstantNode.forShort((short) -128, graph).stamp()); assertEquals(IntegerStamp.create(32, 32767, 32767, 0x7fff, 0x7fff), ConstantNode.forShort((short) 32767, graph).stamp()); assertEquals(IntegerStamp.create(32, -32768, -32768, 0xffff8000L, 0xffff8000L), ConstantNode.forShort((short) -32768, graph).stamp()); } @Test public void testCharConstant() { assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forChar((char) 0, graph).stamp()); assertEquals(IntegerStamp.create(32, 'A', 'A', 'A', 'A'), ConstantNode.forChar('A', graph).stamp()); assertEquals(IntegerStamp.create(32, 128, 128, 0x80, 0x80), ConstantNode.forChar((char) 128, graph).stamp()); assertEquals(IntegerStamp.create(32, 65535, 65535, 0xffff, 0xffff), ConstantNode.forChar((char) 65535, graph).stamp()); } @Test public void testIntConstant() { assertEquals(IntegerStamp.create(32, 0, 0, 0x0, 0x0), ConstantNode.forInt(0, graph).stamp()); assertEquals(IntegerStamp.create(32, 128, 128, 0x80, 0x80), ConstantNode.forInt(128, graph).stamp()); assertEquals(IntegerStamp.create(32, -128, -128, 0xffffff80L, 0xffffff80L), ConstantNode.forInt(-128, graph).stamp()); assertEquals(IntegerStamp.create(32, Integer.MAX_VALUE, Integer.MAX_VALUE, 0x7fffffff, 0x7fffffff), ConstantNode.forInt(Integer.MAX_VALUE, graph).stamp()); assertEquals(IntegerStamp.create(32, Integer.MIN_VALUE, Integer.MIN_VALUE, 0x80000000L, 0x80000000L), ConstantNode.forInt(Integer.MIN_VALUE, graph).stamp()); } @Test public void testLongConstant() { assertEquals(IntegerStamp.create(64, 0, 0, 0x0, 0x0), ConstantNode.forLong(0, graph).stamp()); assertEquals(IntegerStamp.create(64, 128, 128, 0x80, 0x80), ConstantNode.forLong(128, graph).stamp()); assertEquals(IntegerStamp.create(64, -128, -128, 0xffffffffffffff80L, 0xffffffffffffff80L), ConstantNode.forLong(-128, graph).stamp()); assertEquals(IntegerStamp.create(64, Long.MAX_VALUE, Long.MAX_VALUE, 0x7fffffffffffffffL, 0x7fffffffffffffffL), ConstantNode.forLong(Long.MAX_VALUE, graph).stamp()); assertEquals(IntegerStamp.create(64, Long.MIN_VALUE, Long.MIN_VALUE, 0x8000000000000000L, 0x8000000000000000L), ConstantNode.forLong(Long.MIN_VALUE, graph).stamp()); } @Test public void testPositiveRanges() { assertEquals(IntegerStamp.create(32, 0, 0, 0, 0), StampFactory.forInteger(JavaKind.Int, 0, 0)); assertEquals(IntegerStamp.create(32, 0, 1, 0, 1), StampFactory.forInteger(JavaKind.Int, 0, 1)); assertEquals(IntegerStamp.create(32, 0, 0x123, 0, 0x1ff), StampFactory.forInteger(JavaKind.Int, 0, 0x123)); assertEquals(IntegerStamp.create(32, 0x120, 0x123, 0x120, 0x123), StampFactory.forInteger(JavaKind.Int, 0x120, 0x123)); assertEquals(IntegerStamp.create(32, 10000, 15000, 0x2000, 0x3fff), StampFactory.forInteger(JavaKind.Int, 10000, 15000)); assertEquals(IntegerStamp.create(64, 0, 1, 0, 1), StampFactory.forInteger(JavaKind.Long, 0, 1)); assertEquals(IntegerStamp.create(64, 10000, 15000, 0x2000, 0x3fff), StampFactory.forInteger(JavaKind.Long, 10000, 15000)); assertEquals(IntegerStamp.create(64, 140000000000L, 150000000000L, 0x2000000000L, 0x23ffffffffL), StampFactory.forInteger(JavaKind.Long, 140000000000L, 150000000000L)); } @Test public void testNegativeRanges() { assertEquals(IntegerStamp.create(32, -2, -1, 0xfffffffeL, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -2, -1)); assertEquals(IntegerStamp.create(32, -20, -10, 0xffffffe0L, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -20, -10)); assertEquals(IntegerStamp.create(32, -10000, 0, 0, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -10000, 0)); assertEquals(IntegerStamp.create(32, -10000, -1, 0xffffc000L, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -10000, -1)); assertEquals(IntegerStamp.create(32, -10010, -10000, 0xffffd8e0L, 0xffffd8ffL), StampFactory.forInteger(JavaKind.Int, -10010, -10000)); assertEquals(IntegerStamp.create(64, -2, -1, 0xfffffffffffffffeL, 0xffffffffffffffffL), StampFactory.forInteger(JavaKind.Long, -2, -1)); assertEquals(IntegerStamp.create(64, -10010, -10000, 0xffffffffffffd8e0L, 0xffffffffffffd8ffL), StampFactory.forInteger(JavaKind.Long, -10010, -10000)); assertEquals(IntegerStamp.create(64, -150000000000L, -140000000000L, 0xffffffdc00000000L, 0xffffffdfffffffffL), StampFactory.forInteger(JavaKind.Long, -150000000000L, -140000000000L)); } @Test public void testMixedRanges() { assertEquals(IntegerStamp.create(32, -1, 0, 0, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -1, 0)); assertEquals(IntegerStamp.create(32, -10000, 1000, 0, 0xffffffffL), StampFactory.forInteger(JavaKind.Int, -10000, 1000)); assertEquals(IntegerStamp.create(64, -10000, 1000, 0, 0xffffffffffffffffL), StampFactory.forInteger(JavaKind.Long, -10000, 1000)); } private static Stamp narrowingKindConversion(IntegerStamp stamp, JavaKind kind) { Stamp narrow = IntegerStamp.OPS.getNarrow().foldStamp(stamp.getBits(), kind.getBitCount(), stamp); IntegerConvertOp implicitExtend = kind.isUnsigned() ? IntegerStamp.OPS.getZeroExtend() : IntegerStamp.OPS.getSignExtend(); return implicitExtend.foldStamp(kind.getBitCount(), 32, narrow); } @Test public void testNarrowingConversions() { // byte cases assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 0), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 0, 0), JavaKind.Byte)); assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 0, 10), JavaKind.Byte)); assertEquals(StampFactory.forInteger(JavaKind.Int, 10, 20), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 10, 20), JavaKind.Byte)); assertEquals(StampFactory.forInteger(JavaKind.Int, -10, 0), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -10, 0), JavaKind.Byte)); assertEquals(StampFactory.forInteger(JavaKind.Int, -20, -10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -20, -10), JavaKind.Byte)); assertEquals(StampFactory.forInteger(JavaKind.Int, Byte.MIN_VALUE, Byte.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 100, 200), JavaKind.Byte)); assertEquals(StampFactory.forInteger(JavaKind.Int, Byte.MIN_VALUE, Byte.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -100, 200), JavaKind.Byte)); assertEquals(StampFactory.forInteger(JavaKind.Int, Byte.MIN_VALUE, Byte.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -200, -100), JavaKind.Byte)); // char cases assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 0, 10), JavaKind.Char)); assertEquals(StampFactory.forInteger(JavaKind.Int, 10, 20), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 10, 20), JavaKind.Char)); assertEquals(StampFactory.forInteger(JavaKind.Int, Character.MIN_VALUE, Character.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 20000, 80000), JavaKind.Char)); assertEquals(StampFactory.forInteger(JavaKind.Int, Character.MIN_VALUE, Character.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -10000, 40000), JavaKind.Char)); assertEquals(StampFactory.forInteger(JavaKind.Int, Character.MIN_VALUE, Character.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -40000, -10000), JavaKind.Char)); // short cases assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 0, 10), JavaKind.Short)); assertEquals(StampFactory.forInteger(JavaKind.Int, 10, 20), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 10, 20), JavaKind.Short)); assertEquals(StampFactory.forInteger(JavaKind.Int, Short.MIN_VALUE, Short.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, 20000, 40000), JavaKind.Short)); assertEquals(StampFactory.forInteger(JavaKind.Int, Short.MIN_VALUE, Short.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -10000, 40000), JavaKind.Short)); assertEquals(StampFactory.forInteger(JavaKind.Int, Short.MIN_VALUE, Short.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Int, -40000, -10000), JavaKind.Short)); // int cases assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 10), narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, 0, 10), JavaKind.Int)); assertEquals(StampFactory.forInteger(JavaKind.Int, 10, 20), narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, 10, 20), JavaKind.Int)); assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, 20000000000L, 40000000000L), JavaKind.Int)); assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, -10000000000L, 40000000000L), JavaKind.Int)); assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE), narrowingKindConversion(StampFactory.forInteger(JavaKind.Long, -40000000000L, -10000000000L), JavaKind.Int)); } @Test public void testMaskBasedNarrowing() { IntegerStamp stamp = IntegerStamp.create(32, 1, 2, 0x2, 0x3); IntegerStamp resultStamp = IntegerStamp.create(32, 2, 2); assertEquals(resultStamp, stamp); } @Test public void testJoinWeirdMasks() { IntegerStamp minusOneOrThree = IntegerStamp.create(32, -1, 3, 0x3, 0xFFFFFFFFL); IntegerStamp twoOrThree = IntegerStamp.create(32, 2, 3, 0x2, 0x3); IntegerStamp three = IntegerStamp.create(32, 3, 3, 0x3, 0x3); assertEquals(three, minusOneOrThree.join(twoOrThree)); IntegerStamp minusOneOrThreeOrOne = IntegerStamp.create(32, -1, 3, 0x1, 0xFFFFFFFFL); assertEquals(three, minusOneOrThreeOrOne.join(twoOrThree)); IntegerStamp a = IntegerStamp.create(32, 0b101, 0b110, 0b100, 0b111); IntegerStamp b = IntegerStamp.create(32, 0b011, 0b110, 0b010, 0b111); // This exercises a special case: // The new lowest bound is max(0b101, 0b011) = 0b101 // The new down mask is (0b100 | 0b010) = 0b110 // Now based on lowest bound and down mask, we know that the new lowest bound is 0b110 // Just making an or with the new down mask would give however (0b110 | 0b101) = 0b111 and // would therefore be wrong. // New upper bound is 0b110. IntegerStamp result = IntegerStamp.create(32, 0b110, 0b110, 0b110, 0b110); assertEquals(result, a.join(b)); } @Test public void testXor() { assertEquals(IntegerStamp.create(32, 0, 0xff, 0, 0xff), IntegerStamp.OPS.getXor().foldStamp(IntegerStamp.create(32, 0, 0, 0, 0), IntegerStamp.create(32, 0, 0xff, 0, 0xff))); assertEquals(IntegerStamp.create(32, 0x10, 0x1f, 0x10, 0x1f), IntegerStamp.OPS.getXor().foldStamp(IntegerStamp.create(32, 0, 0, 0, 0), IntegerStamp.create(32, 0x10, 0x1f, 0x10, 0x1f))); assertEquals(IntegerStamp.create(32, 0x0, 0xf, 0x0, 0xf), IntegerStamp.OPS.getXor().foldStamp(IntegerStamp.create(32, 0x10, 0x10, 0x10, 0x10), IntegerStamp.create(32, 0x10, 0x1f, 0x10, 0x1f))); assertEquals(IntegerStamp.create(32, 0x10, 0x1f, 0x10, 0x1f), IntegerStamp.OPS.getXor().foldStamp(IntegerStamp.create(32, 0x10, 0x10, 0x10, 0x10), IntegerStamp.create(32, 0x0, 0xf, 0x0, 0xf))); } @Test public void testNot() { assertEquals(IntegerStamp.create(32, -11, -1, 0xffff_fff0L, 0xffff_ffffL), IntegerStamp.OPS.getNot().foldStamp(IntegerStamp.create(32, 0, 10, 0, 0xf))); } @Test public void testAddIntSimple() { assertEquals(StampFactory.forInteger(JavaKind.Int, 0, 30, 0, 31), addIntStamp(StampFactory.forInteger(JavaKind.Int, 0, 10), StampFactory.forInteger(JavaKind.Int, 0, 20))); } @Test public void testAddNegativeOverFlowInt1() { assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE, 0, 0xffff_ffffL), addIntStamp(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, 0), StampFactory.forInteger(JavaKind.Int, -1, 0))); } @Test public void testAddNegativeOverFlowInt2() { assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MAX_VALUE - 2, Integer.MAX_VALUE, 0x7fff_fffcL, 0x7fff_ffffL), addIntStamp(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MIN_VALUE + 1), StampFactory.forInteger(JavaKind.Int, -3, -2))); } @Test public void testAddPositiveOverFlowInt1() { assertEquals(StampFactory.forKind(JavaKind.Int), addIntStamp(StampFactory.forInteger(JavaKind.Int, 0, 1), StampFactory.forInteger(JavaKind.Int, 0, Integer.MAX_VALUE))); } @Test public void testAddPositiveOverFlowInt2() { assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MIN_VALUE + 2), addIntStamp(StampFactory.forInteger(JavaKind.Int, Integer.MAX_VALUE - 1, Integer.MAX_VALUE), StampFactory.forInteger(JavaKind.Int, 2, 3))); } @Test public void testAddOverFlowsInt() { assertEquals(StampFactory.forKind(JavaKind.Int), addIntStamp(StampFactory.forInteger(JavaKind.Int, -1, 1), StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE, Integer.MAX_VALUE))); } @Test public void testAddLongSimple() { assertEquals(StampFactory.forInteger(JavaKind.Long, 0, 30, 0, 31), addIntStamp(StampFactory.forInteger(JavaKind.Long, 0, 10), StampFactory.forInteger(JavaKind.Long, 0, 20))); } @Test public void testAddNegativOverFlowLong1() { assertEquals(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE, 0, 0xffff_ffff_ffff_ffffL), addIntStamp(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MIN_VALUE + 1), StampFactory.forInteger(JavaKind.Long, Integer.MIN_VALUE, Integer.MAX_VALUE))); } @Test public void testAddNegativeOverFlowLong2() { assertEquals(StampFactory.forInteger(JavaKind.Long, Long.MAX_VALUE - 2, Long.MAX_VALUE), addIntStamp(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MIN_VALUE + 1), StampFactory.forInteger(JavaKind.Long, -3, -2))); } @Test public void testAddPositiveOverFlowLong1() { assertEquals(StampFactory.forKind(JavaKind.Long), addIntStamp(StampFactory.forInteger(JavaKind.Long, 0, 1), StampFactory.forInteger(JavaKind.Long, 0, Long.MAX_VALUE))); } @Test public void testAddPositiveOverFlowLong2() { assertEquals(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MIN_VALUE + 2), addIntStamp(StampFactory.forInteger(JavaKind.Long, Long.MAX_VALUE - 1, Long.MAX_VALUE), StampFactory.forInteger(JavaKind.Long, 2, 3))); } @Test public void testAddOverFlowsLong() { assertEquals(StampFactory.forKind(JavaKind.Long), addIntStamp(StampFactory.forInteger(JavaKind.Long, -1, 1), StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE))); } @Test public void testAdd1() { assertEquals(StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE + 1, 31 + (Integer.MIN_VALUE + 1)), addIntStamp(StampFactory.forInteger(JavaKind.Int, 0, 31), StampFactory.forInteger(JavaKind.Int, Integer.MIN_VALUE + 1, Integer.MIN_VALUE + 1))); } @Test public void testAdd2() { assertEquals(StampFactory.forInteger(JavaKind.Int, 0x8000_007e, 0x8000_007f, 0x8000_007eL, 0x8000_007fL), addIntStamp(StampFactory.forInteger(JavaKind.Int, 0x7fff_fffe, 0x7fff_ffff, 0x7fff_fffeL, 0x7ffff_fffL), StampFactory.forInteger(JavaKind.Int, 128, 128))); } @Test public void testAdd3() { assertEquals(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE - 1, 0, 0xffff_ffff_ffff_fffeL), addIntStamp(StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE - 1, 0, 0xffff_ffff_ffff_fffeL), StampFactory.forInteger(JavaKind.Long, Long.MIN_VALUE, Long.MAX_VALUE - 1, 0, 0xffff_ffff_ffff_fffeL))); } @Test public void testAnd() { assertEquals(IntegerStamp.create(32, Integer.MIN_VALUE, 0x40000000L, 0, 0xc0000000L), IntegerStamp.OPS.getAnd().foldStamp(StampFactory.forKind(JavaKind.Int), StampFactory.forConstant(JavaConstant.forInt(0xc0000000)))); } private static void testSignExtendShort(long lower, long upper) { Stamp shortStamp = StampFactory.forInteger(16, lower, upper); Stamp intStamp = IntegerStamp.OPS.getSignExtend().foldStamp(16, 32, shortStamp); assertEquals(StampFactory.forInteger(32, lower, upper), intStamp); } @Test public void testSignExtend() { testSignExtendShort(5, 7); testSignExtendShort(0, 42); testSignExtendShort(-42, -1); testSignExtendShort(-42, 0); testSignExtendShort(-1, 1); testSignExtendShort(Short.MIN_VALUE, Short.MAX_VALUE); } private static void testZeroExtendShort(long lower, long upper, long newLower, long newUpper) { Stamp shortStamp = StampFactory.forInteger(16, lower, upper); Stamp intStamp = IntegerStamp.OPS.getZeroExtend().foldStamp(16, 32, shortStamp); assertEquals(StampFactory.forInteger(32, newLower, newUpper), intStamp); } @Test public void testZeroExtend() { testZeroExtendShort(5, 7, 5, 7); testZeroExtendShort(0, 42, 0, 42); testZeroExtendShort(-42, -1, 0xFFFF - 41, 0xFFFF); testZeroExtendShort(-42, 0, 0, 0xFFFF); testZeroExtendShort(-1, 1, 0, 0xFFFF); testZeroExtendShort(Short.MIN_VALUE, Short.MAX_VALUE, 0, 0xFFFF); } @Test public void testIllegalJoin() { assertFalse(IntegerStamp.create(32, 0, 0xff00, 0, 0xff00).join(IntegerStamp.create(32, 1, 0xff, 0x00, 0xff)).hasValues()); assertFalse(IntegerStamp.create(32, 0x100, 0xff00, 0, 0xff00).join(IntegerStamp.create(32, 0, 0xff, 0x00, 0xff)).hasValues()); } @Test public void testShiftLeft() { ShiftOp shl = IntegerStamp.OPS.getShl(); assertEquals(IntegerStamp.create(32, 0, 0x1ff, 0, 0x1ff), shl.foldStamp(IntegerStamp.create(32, 0, 0xff, 0, 0xff), IntegerStamp.create(32, 0, 1, 0, 1))); assertEquals(IntegerStamp.create(32, 0, 0x1fe0, 0, 0x1fe0), shl.foldStamp(IntegerStamp.create(32, 0, 0xff, 0, 0xff), IntegerStamp.create(32, 5, 5, 5, 5))); assertEquals(IntegerStamp.create(32, 0x1e0, 0x1fe0, 0, 0x1fe0), shl.foldStamp(IntegerStamp.create(32, 0xf, 0xff, 0, 0xff), IntegerStamp.create(32, 5, 5, 5, 5))); assertEquals(IntegerStamp.create(64, 0, 0x1ff, 0, 0x1ff), shl.foldStamp(IntegerStamp.create(64, 0, 0xff, 0, 0xff), IntegerStamp.create(32, 0, 1, 0, 1))); assertEquals(IntegerStamp.create(64, 0, 0x1fe0, 0, 0x1fe0), shl.foldStamp(IntegerStamp.create(64, 0, 0xff, 0, 0xff), IntegerStamp.create(32, 5, 5, 5, 5))); assertEquals(IntegerStamp.create(64, 0x1e0, 0x1fe0, 0, 0x1fe0), shl.foldStamp(IntegerStamp.create(64, 0xf, 0xff, 0, 0xff), IntegerStamp.create(32, 5, 5, 5, 5))); } }