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 * 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

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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);

        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 {

        }

        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 {

        }

        return INT;

    }

    @Override

    public Type mul(final MethodVisitor method, final int programPoint) {

        if(programPoint == INVALID_PROGRAM_POINT) {

            method.visitInsn(IMUL);

        } else {

        }

        return INT;

    }

    @Override

    public Type div(final MethodVisitor method, final int programPoint) {

        if (programPoint == INVALID_PROGRAM_POINT) {

            JSType.DIV_ZERO.invoke(method);

        } else {

        }

        return INT;

    }

    @Override

    public Type rem(final MethodVisitor method, final int programPoint) {

        if (programPoint == INVALID_PROGRAM_POINT) {

            JSType.REM_ZERO.invoke(method);

        } else {

        }

        return INT;

    }

    @Override

    public Type neg(final MethodVisitor method, final int programPoint) {

        if(programPoint == INVALID_PROGRAM_POINT) {

            method.visitInsn(INEG);

        } else {

        }

        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");

    }

}