1*0957b409SSimon J. Gerraty /* 2*0957b409SSimon J. Gerraty * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org> 3*0957b409SSimon J. Gerraty * 4*0957b409SSimon J. Gerraty * Permission is hereby granted, free of charge, to any person obtaining 5*0957b409SSimon J. Gerraty * a copy of this software and associated documentation files (the 6*0957b409SSimon J. Gerraty * "Software"), to deal in the Software without restriction, including 7*0957b409SSimon J. Gerraty * without limitation the rights to use, copy, modify, merge, publish, 8*0957b409SSimon J. Gerraty * distribute, sublicense, and/or sell copies of the Software, and to 9*0957b409SSimon J. Gerraty * permit persons to whom the Software is furnished to do so, subject to 10*0957b409SSimon J. Gerraty * the following conditions: 11*0957b409SSimon J. Gerraty * 12*0957b409SSimon J. Gerraty * The above copyright notice and this permission notice shall be 13*0957b409SSimon J. Gerraty * included in all copies or substantial portions of the Software. 14*0957b409SSimon J. Gerraty * 15*0957b409SSimon J. Gerraty * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16*0957b409SSimon J. Gerraty * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17*0957b409SSimon J. Gerraty * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18*0957b409SSimon J. Gerraty * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19*0957b409SSimon J. Gerraty * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20*0957b409SSimon J. Gerraty * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21*0957b409SSimon J. Gerraty * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22*0957b409SSimon J. Gerraty * SOFTWARE. 23*0957b409SSimon J. Gerraty */ 24*0957b409SSimon J. Gerraty 25*0957b409SSimon J. Gerraty using System; 26*0957b409SSimon J. Gerraty using System.Collections.Generic; 27*0957b409SSimon J. Gerraty 28*0957b409SSimon J. Gerraty abstract class OpcodeJump : Opcode { 29*0957b409SSimon J. Gerraty 30*0957b409SSimon J. Gerraty int disp; 31*0957b409SSimon J. Gerraty OpcodeJump()32*0957b409SSimon J. Gerraty internal OpcodeJump() : this(Int32.MinValue) 33*0957b409SSimon J. Gerraty { 34*0957b409SSimon J. Gerraty } 35*0957b409SSimon J. Gerraty OpcodeJump(int disp)36*0957b409SSimon J. Gerraty internal OpcodeJump(int disp) 37*0957b409SSimon J. Gerraty { 38*0957b409SSimon J. Gerraty this.disp = disp; 39*0957b409SSimon J. Gerraty } 40*0957b409SSimon J. Gerraty 41*0957b409SSimon J. Gerraty internal override int JumpDisp { 42*0957b409SSimon J. Gerraty get { 43*0957b409SSimon J. Gerraty return disp; 44*0957b409SSimon J. Gerraty } 45*0957b409SSimon J. Gerraty } 46*0957b409SSimon J. Gerraty Run(CPU cpu)47*0957b409SSimon J. Gerraty internal override void Run(CPU cpu) 48*0957b409SSimon J. Gerraty { 49*0957b409SSimon J. Gerraty cpu.ipOff += disp; 50*0957b409SSimon J. Gerraty } 51*0957b409SSimon J. Gerraty ResolveJump(int disp)52*0957b409SSimon J. Gerraty internal override void ResolveJump(int disp) 53*0957b409SSimon J. Gerraty { 54*0957b409SSimon J. Gerraty if (this.disp != Int32.MinValue) { 55*0957b409SSimon J. Gerraty throw new Exception("Jump already resolved"); 56*0957b409SSimon J. Gerraty } 57*0957b409SSimon J. Gerraty this.disp = disp; 58*0957b409SSimon J. Gerraty } 59*0957b409SSimon J. Gerraty FixUp(CodeElement[] gcode, int off)60*0957b409SSimon J. Gerraty internal override void FixUp(CodeElement[] gcode, int off) 61*0957b409SSimon J. Gerraty { 62*0957b409SSimon J. Gerraty gcode[off].SetJumpTarget(gcode[off + 1 + disp]); 63*0957b409SSimon J. Gerraty } 64*0957b409SSimon J. Gerraty } 65