mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-22 22:09:12 +00:00
219 lines
No EOL
7.9 KiB
C#
219 lines
No EOL
7.9 KiB
C#
using System;
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using System.Linq;
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using Indy.IL2CPU.Assembler;
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using Indy.IL2CPU.Assembler.X86;
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using CPUx86 = Indy.IL2CPU.Assembler.X86;
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using Instruction = Mono.Cecil.Cil.Instruction;
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using Mono.Cecil.Cil;
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namespace Indy.IL2CPU.IL.X86 {
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public abstract class Op: IL.Op {
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private bool mNeedsExceptionPush;
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private bool mNeedsExceptionClear;
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public Op(Instruction aInstruction, MethodInformation aMethodInfo)
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: base(aInstruction, aMethodInfo) {
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//if (aMethodInfo != null && aMethodInfo.LabelName == "System_Void___Cosmos_Shell_Console_Commands_MatthijsCommand_Execute___System_String___") {
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// System.Diagnostics.Debugger.Break();
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//}
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if (aMethodInfo != null && aMethodInfo.CurrentHandler != null) {
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mNeedsExceptionPush = ((aMethodInfo.CurrentHandler.HandlerStart != null && aMethodInfo.CurrentHandler.HandlerStart.Offset == aInstruction.Offset) || (aMethodInfo.CurrentHandler.FilterStart != null && aMethodInfo.CurrentHandler.FilterStart.Offset == aInstruction.Offset)) && (aMethodInfo.CurrentHandler.Type == ExceptionHandlerType.Catch);
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mNeedsExceptionClear = (aMethodInfo.CurrentHandler.HandlerEnd != null && aMethodInfo.CurrentHandler.HandlerEnd.Offset == (aInstruction.Offset + 1)) || (aMethodInfo.CurrentHandler.FilterEnd != null && aMethodInfo.CurrentHandler.FilterEnd.Offset == (aInstruction.Offset + 1));
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}
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}
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public static void Ldarg(Assembler.Assembler aAssembler, MethodInformation.Argument aArg) {
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Ldarg(aAssembler, aArg, true);
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}
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public static void Ldarg(Assembler.Assembler aAssembler, MethodInformation.Argument aArg, bool aAddGCCode) {
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foreach (string xAddress in aArg.VirtualAddresses.Reverse()) {
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new Move(CPUx86.Registers.EAX, "[" + xAddress + "]");
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new Push(CPUx86.Registers.EAX);
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}
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aAssembler.StackSizes.Push(aArg.Size);
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if (!aAssembler.InMetalMode && aAddGCCode && aArg.IsReferenceType) {
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new CPUx86.Push(CPUx86.Registers.EAX);
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Engine.QueueMethodRef(GCImplementationRefs.IncRefCountRef);
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.IncRefCountRef));
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}
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}
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public static void Ldflda(Assembler.Assembler aAssembler, TypeInformation aType, TypeInformation.Field aField) {
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int aExtraOffset = 0;
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if (aType.NeedsGC && !aAssembler.InMetalMode) {
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aExtraOffset = 12;
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}
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new Popd(CPUx86.Registers.EAX);
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new CPUx86.Add(CPUx86.Registers.EAX, "0x" + (aField.Offset + aExtraOffset).ToString("X"));
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new Pushd(CPUx86.Registers.EAX);
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aAssembler.StackSizes.Push(4);
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}
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public static void Multiply(Assembler.Assembler aAssembler) {
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int xSize = aAssembler.StackSizes.Pop();
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new CPUx86.Xor("edx", "edx");
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if (xSize > 4) {
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new CPUx86.Pop("eax");
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new CPUx86.Add("esp", "4");
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new CPUx86.Multiply("dword [esp]");
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new CPUx86.Add("esp", "8");
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new Pushd("0");
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new Pushd("eax");
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} else {
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new CPUx86.Pop("eax");
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new CPUx86.Multiply("dword [esp]");
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new CPUx86.Add("esp", "4");
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new Pushd("eax");
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}
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}
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public static void Ldfld(Assembler.Assembler aAssembler, TypeInformation aType, TypeInformation.Field aField) {
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Ldfld(aAssembler, aType, aField, true);
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}
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public static void Ldfld(Assembler.Assembler aAssembler, TypeInformation aType, TypeInformation.Field aField, bool aAddGCCode) {
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aAssembler.StackSizes.Pop();
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int aExtraOffset = 0;
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if (aType.NeedsGC && !aAssembler.InMetalMode) {
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aExtraOffset = 12;
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}
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new CPUx86.Pop("ecx");
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new CPUx86.Add("ecx", "0x" + (aField.Offset + aExtraOffset).ToString("X"));
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if (aField.Size >= 4) {
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for (int i = 0; i < (aField.Size / 4); i++) {
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new CPUx86.Move("eax", "[ecx + 0x" + (i * 4).ToString("X") + "]");
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new CPUx86.Pushd("eax");
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}
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switch (aField.Size % 4) {
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case 1: {
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new CPUx86.Move("eax", "0");
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new CPUx86.Move("al", "[ecx + 0x" + (aField.Size - 1).ToString("X") + "]");
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new CPUx86.Push("eax");
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break;
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}
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case 2: {
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new CPUx86.Move("eax", "0");
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new CPUx86.Move("ax", "[ecx + 0x" + (aField.Size - 2).ToString("X") + "]");
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new CPUx86.Push("eax");
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break;
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}
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case 0: {
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break;
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}
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default:
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throw new Exception("Remainder size " + (aField.Size % 4) + " not supported!");
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}
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} else {
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switch (aField.Size) {
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case 1: {
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new CPUx86.Move("eax", "0");
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new CPUx86.Move("al", "[ecx]");
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new CPUx86.Push("eax");
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break;
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}
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case 2: {
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new CPUx86.Move("eax", "0");
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new CPUx86.Move("ax", "[ecx]");
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new CPUx86.Push("eax");
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break;
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}
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case 0: {
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break;
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}
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default:
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throw new Exception("Remainder size " + (aField.Size) + " not supported!");
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}
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}
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if (aAddGCCode && aField.NeedsGC && !aAssembler.InMetalMode) {
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new CPUx86.Pushd(Registers.AtESP);
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Engine.QueueMethodRef(GCImplementationRefs.IncRefCountRef);
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.IncRefCountRef));
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}
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aAssembler.StackSizes.Push(aField.Size);
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}
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public static void Stfld(Assembler.Assembler aAssembler, TypeInformation aType, TypeInformation.Field aField) {
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aAssembler.StackSizes.Pop();
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int xRoundedSize = aField.Size;
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if (xRoundedSize % 4 != 0) {
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xRoundedSize += 4 - (xRoundedSize % 4);
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}
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int aExtraOffset = 0;
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if (aType.NeedsGC && !aAssembler.InMetalMode) {
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aExtraOffset = 12;
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new CPUx86.Pushd("[esp + 4]");
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Ldfld(aAssembler, aType, aField, false);
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Engine.QueueMethod(GCImplementationRefs.DecRefCountRef);
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.DecRefCountRef));
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}
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new CPUx86.Move("ecx", "[esp + 0x" + xRoundedSize.ToString("X") + "]");
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new CPUx86.Add("ecx", "0x" + (aField.Offset + aExtraOffset).ToString("X"));
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for (int i = 1; i <= (aField.Size / 4); i++) {
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new CPUx86.Pop("eax");
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new Move("dword [ecx + 0x" + (aField.Size - (i * 4)).ToString("X") + "]", "eax");
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}
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switch (aField.Size % 4) {
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case 1: {
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new CPUx86.Pop("eax");
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new Move("byte [ecx]", "al");
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break;
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}
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case 2: {
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new CPUx86.Pop("eax");
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new Move("word [ecx]", "ax");
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break;
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}
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case 0: {
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break;
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}
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default:
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throw new Exception("Remainder size " + (aField.Size % 4) + " not supported!");
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}
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if (aField.NeedsGC && !aAssembler.InMetalMode) {
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new CPUx86.Pushd(Registers.ECX);
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new CPUx86.Pushd(Registers.EAX);
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.DecRefCountRef));
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.DecRefCountRef));
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}
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new CPUx86.Add("esp", "4");
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aAssembler.StackSizes.Pop();
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}
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public static void Add(Assembler.Assembler aAssembler) {
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int xSize = aAssembler.StackSizes.Pop();
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new CPUx86.Pop("eax");
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if (xSize == 8) {
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new CPUx86.Add("esp", "4");
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}
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new CPUx86.Add("eax", "[esp]");
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new CPUx86.Add("esp", "4");
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new Pushd("eax");
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}
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public static void Ldloc(Assembler.Assembler aAssembler, MethodInformation.Variable aLocal) {
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Ldloc(aAssembler, aLocal, true);
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}
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public static void Ldloc(Assembler.Assembler aAssembler, MethodInformation.Variable aLocal, bool aAddGCCode) {
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foreach (string s in aLocal.VirtualAddresses) {
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new CPUx86.Move("eax", "[" + s + "]");
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new CPUx86.Push("eax");
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}
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aAssembler.StackSizes.Push(aLocal.Size);
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if (!aAssembler.InMetalMode && aAddGCCode && aLocal.IsReferenceType) {
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new CPUx86.Push("eax");
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Engine.QueueMethodRef(GCImplementationRefs.IncRefCountRef);
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.IncRefCountRef));
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}
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}
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protected override void AssembleHeader() {
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base.AssembleHeader();
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if (mNeedsExceptionPush) {
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new CPUx86.Push("dword [" + DataMember.GetStaticFieldName(IL2CPU.Assembler.Assembler.CurrentExceptionRef) + "]");
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Assembler.StackSizes.Push(4);
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}
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}
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}
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} |