/* * Copyright (c) 2010, 2013, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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 jdk.nashorn.internal.codegen.types; import static jdk.internal.org.objectweb.asm.Opcodes.BIPUSH; import static jdk.internal.org.objectweb.asm.Opcodes.I2D; import static jdk.internal.org.objectweb.asm.Opcodes.I2L; import static jdk.internal.org.objectweb.asm.Opcodes.IADD; import static jdk.internal.org.objectweb.asm.Opcodes.IAND; import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_0; import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_1; import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_2; import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_3; import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_4; import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_5; import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_M1; import static jdk.internal.org.objectweb.asm.Opcodes.ILOAD; import static jdk.internal.org.objectweb.asm.Opcodes.IMUL; import static jdk.internal.org.objectweb.asm.Opcodes.INEG; import static jdk.internal.org.objectweb.asm.Opcodes.IOR; import static jdk.internal.org.objectweb.asm.Opcodes.IRETURN; import static jdk.internal.org.objectweb.asm.Opcodes.ISHL; import static jdk.internal.org.objectweb.asm.Opcodes.ISHR; import static jdk.internal.org.objectweb.asm.Opcodes.ISTORE; import static jdk.internal.org.objectweb.asm.Opcodes.ISUB; import static jdk.internal.org.objectweb.asm.Opcodes.IUSHR; import static jdk.internal.org.objectweb.asm.Opcodes.IXOR; import static jdk.internal.org.objectweb.asm.Opcodes.SIPUSH; import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup; import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_INT; import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT; import jdk.internal.org.objectweb.asm.MethodVisitor; import jdk.nashorn.internal.codegen.CompilerConstants; import jdk.nashorn.internal.runtime.JSType; /** * Type class: INT */ class IntType extends BitwiseType { private static final long serialVersionUID = 1L; private static final CompilerConstants.Call TO_STRING = staticCallNoLookup(Integer.class, "toString", String.class, int.class); private static final CompilerConstants.Call VALUE_OF = staticCallNoLookup(Integer.class, "valueOf", Integer.class, int.class); protected IntType() { super("int", int.class, 2, 1); } @Override public Type nextWider() { return NUMBER; } @Override public Class getBoxedType() { return Integer.class; } @Override public char getBytecodeStackType() { return 'I'; } @Override public Type ldc(final MethodVisitor method, final Object c) { assert c instanceof Integer; final int value = ((Integer) c).intValue(); switch (value) { case -1: method.visitInsn(ICONST_M1); break; case 0: method.visitInsn(ICONST_0); break; case 1: method.visitInsn(ICONST_1); break; case 2: method.visitInsn(ICONST_2); break; case 3: method.visitInsn(ICONST_3); break; case 4: method.visitInsn(ICONST_4); break; case 5: method.visitInsn(ICONST_5); break; default: if (value == (byte) value) { method.visitIntInsn(BIPUSH, value); } else if (value == (short) value) { method.visitIntInsn(SIPUSH, value); } else { method.visitLdcInsn(c); } break; } return Type.INT; } @Override public Type convert(final MethodVisitor method, final Type to) { if (to.isEquivalentTo(this)) { return to; } if (to.isNumber()) { method.visitInsn(I2D); } else if (to.isLong()) { method.visitInsn(I2L); } else if (to.isBoolean()) { //nop } else if (to.isString()) { invokestatic(method, TO_STRING); } else if (to.isObject()) { invokestatic(method, VALUE_OF); } else { throw new UnsupportedOperationException("Illegal conversion " + this + " -> " + to); } return to; } @Override public Type add(final MethodVisitor method, final int programPoint) { if(programPoint == INVALID_PROGRAM_POINT) { method.visitInsn(IADD); } else { method.visitInvokeDynamicInsn("iadd", "(II)I", MATHBOOTSTRAP, programPoint); } return INT; } @Override public Type shr(final MethodVisitor method) { method.visitInsn(IUSHR); return INT; } @Override public Type sar(final MethodVisitor method) { method.visitInsn(ISHR); return INT; } @Override public Type shl(final MethodVisitor method) { method.visitInsn(ISHL); return INT; } @Override public Type and(final MethodVisitor method) { method.visitInsn(IAND); return INT; } @Override public Type or(final MethodVisitor method) { method.visitInsn(IOR); return INT; } @Override public Type xor(final MethodVisitor method) { method.visitInsn(IXOR); return INT; } @Override public Type load(final MethodVisitor method, final int slot) { assert slot != -1; method.visitVarInsn(ILOAD, slot); return INT; } @Override public void store(final MethodVisitor method, final int slot) { assert slot != -1; method.visitVarInsn(ISTORE, slot); } @Override public Type sub(final MethodVisitor method, final int programPoint) { if(programPoint == INVALID_PROGRAM_POINT) { method.visitInsn(ISUB); } else { method.visitInvokeDynamicInsn("isub", "(II)I", MATHBOOTSTRAP, programPoint); } return INT; } @Override public Type mul(final MethodVisitor method, final int programPoint) { if(programPoint == INVALID_PROGRAM_POINT) { method.visitInsn(IMUL); } else { method.visitInvokeDynamicInsn("imul", "(II)I", MATHBOOTSTRAP, programPoint); } return INT; } @Override public Type div(final MethodVisitor method, final int programPoint) { if (programPoint == INVALID_PROGRAM_POINT) { JSType.DIV_ZERO.invoke(method); } else { method.visitInvokeDynamicInsn("idiv", "(II)I", MATHBOOTSTRAP, programPoint); } return INT; } @Override public Type rem(final MethodVisitor method, final int programPoint) { if (programPoint == INVALID_PROGRAM_POINT) { JSType.REM_ZERO.invoke(method); } else { method.visitInvokeDynamicInsn("irem", "(II)I", MATHBOOTSTRAP, programPoint); } return INT; } @Override public Type neg(final MethodVisitor method, final int programPoint) { if(programPoint == INVALID_PROGRAM_POINT) { method.visitInsn(INEG); } else { method.visitInvokeDynamicInsn("ineg", "(I)I", MATHBOOTSTRAP, programPoint); } return INT; } @Override public void _return(final MethodVisitor method) { method.visitInsn(IRETURN); } @Override public Type loadUndefined(final MethodVisitor method) { method.visitLdcInsn(UNDEFINED_INT); return INT; } @Override public Type loadForcedInitializer(final MethodVisitor method) { method.visitInsn(ICONST_0); return INT; } @Override public Type cmp(final MethodVisitor method, final boolean isCmpG) { throw new UnsupportedOperationException("cmp" + (isCmpG ? 'g' : 'l')); } @Override public Type cmp(final MethodVisitor method) { throw new UnsupportedOperationException("cmp"); } }