InstInfo.java

/*
  InstInfo.java

  (c) 2010-2013 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.common.asm;

/**
 * @author  Ed
 */
public class InstInfo {
	/**
	 * machine cycles 
	 */
	//public short cycles;
	/**
	 * bit mask from Status.ST_xxx
	 */
	public int stsetBefore;
	/**
	 * bit mask from Status.ST_xxx
	 */
	public int stsetAfter;
	/**
	 * bit mask from Status.ST_xxx
	 */
	public int stReads;
	/**
	 * bit mask from Status.ST_xxx
	 */
	public int stWrites;
	/** operand is a jump (INST_JUMP_COND = conditional) */
	public int jump;
	/**
	 * INST_RSRC_xxx mask
	 */
	public int reads;
	/**
	 * INST_RSRC_xxx mask
	 * 
	 */
	public int writes;
	/** Instruction does not jump */
	public static final int INST_JUMP_FALSE = 0;
	/** Instruction always jumps */
	public static final int INST_JUMP_TRUE = 1;
	/** Instruction jumps conditionally */
	public static final int INST_JUMP_COND = 2;
	public static final int INST_RSRC_PC = 1;	// program counter
	public static final int INST_RSRC_WP = 2;	// workspace pointer (9900)
	public static final int INST_RSRC_ST = 4;	// status
	public static final int INST_RSRC_IO = 8;	// I/O
	public static final int INST_RSRC_EMU = 16; // emulator itself (builtin)
	public static final int INST_RSRC_CTX = 32;	// context switch (writer only)

	/**
	 * 
	 */
	public InstInfo() {
	}
}