InstructionFactory9900.java

/*
  InstructionFactory9900.java

  (c) 2011-2014 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.machine.ti99.asm;

import v9t9.common.asm.IDecompileInfo;
import v9t9.common.asm.IInstructionFactory;
import v9t9.common.asm.RawInstruction;
import v9t9.common.cpu.ICpuState;
import v9t9.common.memory.IMemoryDomain;
import v9t9.machine.ti99.cpu.InstTable9900;
import v9t9.machine.ti99.cpu.Instruction9900;

/**
 * @author ejs
 *
 */
public class InstructionFactory9900 implements IInstructionFactory {

	public static final IInstructionFactory INSTANCE = new InstructionFactory9900();

	/**
	 * 
	 */
	public InstructionFactory9900() {
		super();
	}

	@Override
	public byte[] encodeInstruction(RawInstruction instruction) {
		short[] words = InstTable9900.encode(instruction);
		byte[] bytes = new byte[words.length * 2];
		for (int idx = 0; idx < words.length; idx++) {
			bytes[idx*2] = (byte) (words[idx] >> 8);
			bytes[idx*2+1] = (byte) (words[idx] & 0xff);
		}
		return bytes;
	}

	@Override
	public RawInstruction decodeInstruction(int pc, IMemoryDomain domain) {
		return new Instruction9900(
				InstTable9900.decodeInstruction(domain.readWord(pc), pc, domain), domain);
	}

	public boolean isByteInst(int inst) {
		return InstTable9900.isByteInst(inst);
	}

	@Override
	public boolean isJumpInst(int inst) {
		return InstTable9900.isJumpInst(inst);
	}

	@Override
	public String getInstName(int inst) {
		return InstTable9900.getInstName(inst);
	}

	@Override
	public int getInstructionFlags(RawInstruction inst) {
		return Instruction9900.getInstructionFlags(inst);
	}

	@Override
	public IDecompileInfo createDecompileInfo(ICpuState cpuState) {
		return new HighLevelCodeInfo(cpuState, this);
	}

}