btc_o32_Ed_Gd_mem.java

package org.jpc.emulator.execution.opcodes.rm;

import org.jpc.emulator.execution.*;
import org.jpc.emulator.execution.decoder.*;
import org.jpc.emulator.processor.*;
import org.jpc.emulator.processor.fpu64.*;
import static org.jpc.emulator.processor.Processor.*;

public class btc_o32_Ed_Gd_mem extends Executable
{
    final Pointer op1;
    final int op2Index;

    public btc_o32_Ed_Gd_mem(int blockStart, Instruction parent)
    {
        super(blockStart, parent);
        op1 = new Pointer(parent.operand[0], parent.adr_mode);
        op2Index = Processor.getRegIndex(parent.operand[1].toString());
    }

    public Branch execute(Processor cpu)
    {
        Reg op2 = cpu.regs[op2Index];
        int bit = 1 << op2.get32();
        int offset = ((op2.get32() & ~(32-1))/8);
        cpu.cf = (0 != (op1.get32(cpu,  offset) & bit));
        cpu.flagStatus &= NCF;
        op1.set32(cpu,  offset, (op1.get32(cpu,  offset)^bit));
        return Branch.None;
    }

    public boolean isBranch()
    {
        return false;
    }

    public String toString()
    {
        return this.getClass().getName();
    }
}