| /* |
| * 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; |
| |
| /** |
| * Type class: INT |
| */ |
| class IntType extends BitwiseType { |
| |
| 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 LONG; |
| } |
| |
| @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) { |
| // Never perform non-optimistic integer division in JavaScript. |
| assert programPoint != INVALID_PROGRAM_POINT; |
| |
| method.visitInvokeDynamicInsn("idiv", "(II)I", MATHBOOTSTRAP, programPoint); |
| return INT; |
| } |
| |
| @Override |
| public Type rem(final MethodVisitor method, final int programPoint) { |
| // Never perform non-optimistic integer remainder in JavaScript. |
| assert programPoint != INVALID_PROGRAM_POINT; |
| |
| 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"); |
| } |
| |
| } |