/* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ using System; using System.Collections.Generic; abstract class OpcodeJump : Opcode { int disp; internal OpcodeJump() : this(Int32.MinValue) { } internal OpcodeJump(int disp) { this.disp = disp; } internal override int JumpDisp { get { return disp; } } internal override void Run(CPU cpu) { cpu.ipOff += disp; } internal override void ResolveJump(int disp) { if (this.disp != Int32.MinValue) { throw new Exception("Jump already resolved"); } this.disp = disp; } internal override void FixUp(CodeElement[] gcode, int off) { gcode[off].SetJumpTarget(gcode[off + 1 + disp]); } }