1 /* 2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org> 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining 5 * a copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sublicense, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 25 using System; 26 using System.Collections.Generic; 27 28 class OpcodeCall : Opcode { 29 30 Word target; 31 32 internal OpcodeCall() : this(null) 33 { 34 } 35 36 internal OpcodeCall(Word target) 37 { 38 this.target = target; 39 } 40 41 internal override void ResolveTarget(Word target) 42 { 43 if (this.target != null) { 44 throw new Exception("Opcode already resolved"); 45 } 46 this.target = target; 47 } 48 49 internal override void Run(CPU cpu) 50 { 51 target.Run(cpu); 52 } 53 54 internal override Word GetReference(T0Comp ctx) 55 { 56 if (target == null) { 57 throw new Exception("Unresolved call target"); 58 } 59 return target; 60 } 61 62 internal override CodeElement ToCodeElement() 63 { 64 return new CodeElementUInt((uint)target.Slot); 65 } 66 67 public override string ToString() 68 { 69 return "call " + (target == null ? "UNRESOLVED" : target.Name); 70 } 71 } 72