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using ChocolArm64.Decoders;
using ChocolArm64.Memory;
using ChocolArm64.State;
using ChocolArm64.Translation;
using System;
using System.Reflection.Emit;
using System.Runtime.Intrinsics.X86;
namespace ChocolArm64.Instructions
{
static class InstEmitMemoryHelper
{
private static int _tempIntAddress = ILEmitterCtx.GetIntTempIndex();
private static int _tempIntValue = ILEmitterCtx.GetIntTempIndex();
private static int _tempIntPtAddr = ILEmitterCtx.GetIntTempIndex();
private static int _tempVecValue = ILEmitterCtx.GetVecTempIndex();
private enum Extension
{
Zx,
Sx32,
Sx64
}
public static void EmitReadZxCall(ILEmitterCtx context, int size)
{
EmitReadCall(context, Extension.Zx, size);
}
public static void EmitReadSx32Call(ILEmitterCtx context, int size)
{
EmitReadCall(context, Extension.Sx32, size);
}
public static void EmitReadSx64Call(ILEmitterCtx context, int size)
{
EmitReadCall(context, Extension.Sx64, size);
}
private static void EmitReadCall(ILEmitterCtx context, Extension ext, int size)
{
//Save the address into a temp.
context.EmitStint(_tempIntAddress);
bool isSimd = IsSimd(context);
if (size < 0 || size > (isSimd ? 4 : 3))
{
throw new ArgumentOutOfRangeException(nameof(size));
}
if (isSimd)
{
if (context.Tier == TranslationTier.Tier0 || !Sse2.IsSupported || size < 2)
{
EmitReadVectorFallback(context, size);
}
else
{
EmitReadVector(context, size);
}
}
else
{
if (context.Tier == TranslationTier.Tier0)
{
EmitReadIntFallback(context, size);
}
else
{
EmitReadInt(context, size);
}
}
if (!isSimd)
{
if (ext == Extension.Sx32 ||
ext == Extension.Sx64)
{
switch (size)
{
case 0: context.Emit(OpCodes.Conv_I1); break;
case 1: context.Emit(OpCodes.Conv_I2); break;
case 2: context.Emit(OpCodes.Conv_I4); break;
}
}
if (size < 3)
{
context.Emit(ext == Extension.Sx64
? OpCodes.Conv_I8
: OpCodes.Conv_U8);
}
}
}
public static void EmitWriteCall(ILEmitterCtx context, int size)
{
bool isSimd = IsSimd(context);
//Save the value into a temp.
if (isSimd)
{
context.EmitStvec(_tempVecValue);
}
else
{
context.EmitStint(_tempIntValue);
}
//Save the address into a temp.
context.EmitStint(_tempIntAddress);
if (size < 0 || size > (isSimd ? 4 : 3))
{
throw new ArgumentOutOfRangeException(nameof(size));
}
if (isSimd)
{
if (context.Tier == TranslationTier.Tier0 || !Sse2.IsSupported || size < 2)
{
EmitWriteVectorFallback(context, size);
}
else
{
EmitWriteVector(context, size);
}
}
else
{
if (context.Tier == TranslationTier.Tier0)
{
EmitWriteIntFallback(context, size);
}
else
{
EmitWriteInt(context, size);
}
}
}
private static bool IsSimd(ILEmitterCtx context)
{
return context.CurrOp is IOpCodeSimd64 &&
!(context.CurrOp is OpCodeSimdMemMs64 ||
context.CurrOp is OpCodeSimdMemSs64);
}
private static void EmitReadInt(ILEmitterCtx context, int size)
{
EmitAddressCheck(context, size);
ILLabel lblFastPath = new ILLabel();
ILLabel lblSlowPath = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.Emit(OpCodes.Brfalse_S, lblFastPath);
context.MarkLabel(lblSlowPath);
EmitReadIntFallback(context, size);
context.Emit(OpCodes.Br, lblEnd);
context.MarkLabel(lblFastPath);
EmitPtPointerLoad(context, lblSlowPath);
switch (size)
{
case 0: context.Emit(OpCodes.Ldind_U1); break;
case 1: context.Emit(OpCodes.Ldind_U2); break;
case 2: context.Emit(OpCodes.Ldind_U4); break;
case 3: context.Emit(OpCodes.Ldind_I8); break;
}
context.MarkLabel(lblEnd);
}
private static void EmitReadVector(ILEmitterCtx context, int size)
{
EmitAddressCheck(context, size);
ILLabel lblFastPath = new ILLabel();
ILLabel lblSlowPath = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.Emit(OpCodes.Brfalse_S, lblFastPath);
context.MarkLabel(lblSlowPath);
EmitReadVectorFallback(context, size);
context.Emit(OpCodes.Br, lblEnd);
context.MarkLabel(lblFastPath);
EmitPtPointerLoad(context, lblSlowPath);
switch (size)
{
case 2: context.EmitCall(typeof(Sse), nameof(Sse.LoadScalarVector128)); break;
case 3:
{
Type[] types = new Type[] { typeof(double*) };
context.EmitCall(typeof(Sse2).GetMethod(nameof(Sse2.LoadScalarVector128), types));
break;
}
case 4: context.EmitCall(typeof(Sse), nameof(Sse.LoadAlignedVector128)); break;
throw new InvalidOperationException($"Invalid vector load size of {1 << size} bytes.");
}
context.MarkLabel(lblEnd);
}
private static void EmitWriteInt(ILEmitterCtx context, int size)
{
EmitAddressCheck(context, size);
ILLabel lblFastPath = new ILLabel();
ILLabel lblSlowPath = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.Emit(OpCodes.Brfalse_S, lblFastPath);
context.MarkLabel(lblSlowPath);
EmitWriteIntFallback(context, size);
context.Emit(OpCodes.Br, lblEnd);
context.MarkLabel(lblFastPath);
EmitPtPointerLoad(context, lblSlowPath);
context.EmitLdint(_tempIntValue);
if (size < 3)
{
context.Emit(OpCodes.Conv_U4);
}
switch (size)
{
case 0: context.Emit(OpCodes.Stind_I1); break;
case 1: context.Emit(OpCodes.Stind_I2); break;
case 2: context.Emit(OpCodes.Stind_I4); break;
case 3: context.Emit(OpCodes.Stind_I8); break;
}
context.MarkLabel(lblEnd);
}
private static void EmitWriteVector(ILEmitterCtx context, int size)
{
EmitAddressCheck(context, size);
ILLabel lblFastPath = new ILLabel();
ILLabel lblSlowPath = new ILLabel();
ILLabel lblEnd = new ILLabel();
context.Emit(OpCodes.Brfalse_S, lblFastPath);
context.MarkLabel(lblSlowPath);
EmitWriteVectorFallback(context, size);
context.Emit(OpCodes.Br, lblEnd);
context.MarkLabel(lblFastPath);
EmitPtPointerLoad(context, lblSlowPath);
context.EmitLdvec(_tempVecValue);
switch (size)
{
case 2: context.EmitCall(typeof(Sse), nameof(Sse.StoreScalar)); break;
case 3: context.EmitCall(typeof(Sse2), nameof(Sse2.StoreScalar)); break;
case 4: context.EmitCall(typeof(Sse), nameof(Sse.StoreAligned)); break;
default: throw new InvalidOperationException($"Invalid vector store size of {1 << size} bytes.");
}
context.MarkLabel(lblEnd);
}
private static void EmitAddressCheck(ILEmitterCtx context, int size)
{
long addressCheckMask = ~(context.Memory.AddressSpaceSize - 1);
addressCheckMask |= (1u << size) - 1;
context.EmitLdint(_tempIntAddress);
context.EmitLdc_I(addressCheckMask);
context.Emit(OpCodes.And);
}
private static void EmitPtPointerLoad(ILEmitterCtx context, ILLabel lblFallbackPath)
{
context.EmitLdc_I8(context.Memory.PageTable.ToInt64());
context.Emit(OpCodes.Conv_I);
int bit = MemoryManager.PageBits;
do
{
context.EmitLdint(_tempIntAddress);
if (context.CurrOp.RegisterSize == RegisterSize.Int32)
{
context.Emit(OpCodes.Conv_U8);
}
context.EmitLsr(bit);
bit += context.Memory.PtLevelBits;
if (bit < context.Memory.AddressSpaceBits)
{
context.EmitLdc_I8(context.Memory.PtLevelMask);
context.Emit(OpCodes.And);
}
context.EmitLdc_I8(IntPtr.Size);
context.Emit(OpCodes.Mul);
context.Emit(OpCodes.Conv_I);
context.Emit(OpCodes.Add);
context.Emit(OpCodes.Ldind_I);
}
while (bit < context.Memory.AddressSpaceBits);
if (!context.Memory.HasWriteWatchSupport)
{
context.Emit(OpCodes.Conv_U8);
context.EmitStint(_tempIntPtAddr);
context.EmitLdint(_tempIntPtAddr);
context.EmitLdc_I8(MemoryManager.PteFlagsMask);
context.Emit(OpCodes.And);
context.Emit(OpCodes.Brtrue, lblFallbackPath);
context.EmitLdint(_tempIntPtAddr);
context.Emit(OpCodes.Conv_I);
}
context.EmitLdint(_tempIntAddress);
context.EmitLdc_I(MemoryManager.PageMask);
context.Emit(OpCodes.And);
context.Emit(OpCodes.Conv_I);
context.Emit(OpCodes.Add);
}
private static void EmitReadIntFallback(ILEmitterCtx context, int size)
{
context.EmitLdarg(TranslatedSub.MemoryArgIdx);
context.EmitLdint(_tempIntAddress);
if (context.CurrOp.RegisterSize == RegisterSize.Int32)
{
context.Emit(OpCodes.Conv_U8);
}
string fallbackMethodName = null;
switch (size)
{
case 0: fallbackMethodName = nameof(MemoryManager.ReadByte); break;
case 1: fallbackMethodName = nameof(MemoryManager.ReadUInt16); break;
case 2: fallbackMethodName = nameof(MemoryManager.ReadUInt32); break;
case 3: fallbackMethodName = nameof(MemoryManager.ReadUInt64); break;
}
context.EmitCall(typeof(MemoryManager), fallbackMethodName);
}
private static void EmitReadVectorFallback(ILEmitterCtx context, int size)
{
context.EmitLdarg(TranslatedSub.MemoryArgIdx);
context.EmitLdint(_tempIntAddress);
if (context.CurrOp.RegisterSize == RegisterSize.Int32)
{
context.Emit(OpCodes.Conv_U8);
}
string fallbackMethodName = null;
switch (size)
{
case 0: fallbackMethodName = nameof(MemoryManager.ReadVector8); break;
case 1: fallbackMethodName = nameof(MemoryManager.ReadVector16); break;
case 2: fallbackMethodName = nameof(MemoryManager.ReadVector32); break;
case 3: fallbackMethodName = nameof(MemoryManager.ReadVector64); break;
case 4: fallbackMethodName = nameof(MemoryManager.ReadVector128); break;
}
context.EmitCall(typeof(MemoryManager), fallbackMethodName);
}
private static void EmitWriteIntFallback(ILEmitterCtx context, int size)
{
context.EmitLdarg(TranslatedSub.MemoryArgIdx);
context.EmitLdint(_tempIntAddress);
if (context.CurrOp.RegisterSize == RegisterSize.Int32)
{
context.Emit(OpCodes.Conv_U8);
}
context.EmitLdint(_tempIntValue);
if (size < 3)
{
context.Emit(OpCodes.Conv_U4);
}
string fallbackMethodName = null;
switch (size)
{
case 0: fallbackMethodName = nameof(MemoryManager.WriteByte); break;
case 1: fallbackMethodName = nameof(MemoryManager.WriteUInt16); break;
case 2: fallbackMethodName = nameof(MemoryManager.WriteUInt32); break;
case 3: fallbackMethodName = nameof(MemoryManager.WriteUInt64); break;
}
context.EmitCall(typeof(MemoryManager), fallbackMethodName);
}
private static void EmitWriteVectorFallback(ILEmitterCtx context, int size)
{
context.EmitLdarg(TranslatedSub.MemoryArgIdx);
context.EmitLdint(_tempIntAddress);
if (context.CurrOp.RegisterSize == RegisterSize.Int32)
{
context.Emit(OpCodes.Conv_U8);
}
context.EmitLdvec(_tempVecValue);
string fallbackMethodName = null;
switch (size)
{
case 0: fallbackMethodName = nameof(MemoryManager.WriteVector8); break;
case 1: fallbackMethodName = nameof(MemoryManager.WriteVector16); break;
case 2: fallbackMethodName = nameof(MemoryManager.WriteVector32); break;
case 3: fallbackMethodName = nameof(MemoryManager.WriteVector64); break;
case 4: fallbackMethodName = nameof(MemoryManager.WriteVector128); break;
}
context.EmitCall(typeof(MemoryManager), fallbackMethodName);
}
}
}
|
