mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 12:30:32 +00:00
91 lines
3.4 KiB
C#
91 lines
3.4 KiB
C#
using System;
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using System.Linq;
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using CPU = Cosmos.Assembler;
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using System.Text;
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using Cosmos.Assembler;
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using Cosmos.IL2CPU.ILOpCodes;
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using Cosmos.IL2CPU.IL.CustomImplementations.System;
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using Cosmos.Assembler.x86;
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namespace Cosmos.IL2CPU.X86.IL
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{
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[Cosmos.IL2CPU.OpCode(ILOpCode.Code.Ldstr)]
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public class LdStr: ILOp
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{
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public LdStr(Cosmos.Assembler.Assembler aAsmblr):base(aAsmblr)
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{
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}
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public override void Execute(MethodInfo aMethod, ILOpCode aOpCode) {
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var xOpString = aOpCode as OpString;
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string xDataName = GetContentsArrayName(xOpString.Value);
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new Comment( Assembler, "String Value: " + xOpString.Value.Replace( "\r", "\\r" ).Replace( "\n", "\\n" ) );
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new Mov { DestinationReg = RegistersEnum.EAX, SourceRef = Cosmos.Assembler.ElementReference.New(xDataName) };
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new Push { DestinationReg = RegistersEnum.EAX };
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// DEBUG VERIFICATION: leave it here for now. we have issues with fields ordering. if that changes, we need to change the code below!
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#region Debug verification
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var xFields = GetFieldsInfo(typeof(string), false).Where(i => !i.IsStatic).ToArray();
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if (xFields[0].Id != "System.Int32 System.String.m_stringLength"
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|| xFields[0].Offset != 0) {
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throw new Exception("Fields changed!");
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}
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if (xFields[1].Id != "System.Char System.String.m_firstChar"
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|| xFields[1].Offset != 4) {
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throw new Exception("Fields changed!");
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}
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#endregion
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}
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public static string GetContentsArrayName(string aLiteral) {
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var xAsm = CPU.Assembler.CurrentInstance;
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Encoding xEncoding = Encoding.Unicode;
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string xDataName = xAsm.GetIdentifier("StringLiteral");
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var xBytecount = xEncoding.GetByteCount(aLiteral);
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var xObjectData = new byte[(4*4) + (xBytecount)];
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Array.Copy(BitConverter.GetBytes((int)-1), 0, xObjectData, 0, 4);
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Array.Copy(BitConverter.GetBytes((uint)InstanceTypeEnum.StaticEmbeddedObject), 0, xObjectData, 4, 4);
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Array.Copy(BitConverter.GetBytes((int)1), 0, xObjectData, 8, 4);
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Array.Copy(BitConverter.GetBytes(aLiteral.Length), 0, xObjectData, 12, 4);
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Array.Copy(xEncoding.GetBytes(aLiteral), 0, xObjectData, 16, xBytecount);
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xAsm.DataMembers.Add(new CPU.DataMember(xDataName, xObjectData));
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return xDataName;
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}
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// using System;
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// using System.Linq;
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// using System.Text;
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// using Cosmos.IL2CPU.X86;
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// using Cosmos.IL2CPU.X86.X;
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// using CPUx86 = Cosmos.Assembler.x86;
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// using Asm = Assembler;
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// using System.Collections.Generic;
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//
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// namespace Cosmos.IL2CPU.IL.X86 {
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// [Cosmos.Assembler.OpCode(OpCodeEnum.Ldstr)]
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// public class LdStr : Op {
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// //private static Dictionary<string, DataMember> mDataMemberMap = new Dictionary<string, DataMember>();
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// public readonly string LiteralStr;
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//
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// //public static void ScanOp(ILReader aReader, MethodInformation aMethodInfo, SortedList<string, object> aMethodData) {
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// // Engine.RegisterType(typeof(string));
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// //}
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//
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// public LdStr(ILReader aReader, MethodInformation aMethodInfo)
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// : base(aReader, aMethodInfo) {
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// LiteralStr = aReader.OperandValueStr;
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// }
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//
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// public LdStr(string aLiteralStr)
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// : base(null, null) {
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// LiteralStr = aLiteralStr;
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// }
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//
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// }
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// }
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}
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}
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