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Code Issues Releases Activity

Implement some 32-bit Thumb instructions (#3614)

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* Implement some 32-bit Thumb instructions

* Optimize OpCode32MemMult using PopCount
This commit is contained in:
gdkchan 2022-08-25 06:59:34 -03:00 committed by GitHub
parent b994dafe7a
commit eba682b767
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GPG key ID: 4AEE18F83AFDEB23
13 changed files with 190 additions and 15 deletions
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8
ARMeilleure/Decoders/IOpCode32MemRsImm.cs Normal file
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@ -0,0 +1,8 @@
namespace ARMeilleure.Decoders
{
interface IOpCode32MemRsImm : IOpCode32Mem
{
int Rm { get; }
ShiftType ShiftType { get; }
}
}

11
ARMeilleure/Decoders/OpCode32MemMult.cs
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@ -1,3 +1,5 @@
using System.Numerics;
namespace ARMeilleure.Decoders
{
class OpCode32MemMult : OpCode32, IOpCode32MemMult
@ -23,14 +25,7 @@ namespace ARMeilleure.Decoders
RegisterMask = opCode & 0xffff;
int regsSize = 0;
for (int index = 0; index < 16; index++)
{
regsSize += (RegisterMask >> index) & 1;
}
regsSize *= 4;
int regsSize = BitOperations.PopCount((uint)RegisterMask) * 4;
if (!u)
{

2
ARMeilleure/Decoders/OpCode32MemRsImm.cs
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@ -1,6 +1,6 @@
namespace ARMeilleure.Decoders
{
class OpCode32MemRsImm : OpCode32Mem
class OpCode32MemRsImm : OpCode32Mem, IOpCode32MemRsImm
{
public int Rm { get; }
public ShiftType ShiftType { get; }

4
ARMeilleure/Decoders/OpCodeT16BImmCmp.cs
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@ -1,10 +1,10 @@
namespace ARMeilleure.Decoders
{
class OpCodeT16BImmCmp : OpCodeT16
class OpCodeT16BImmCmp : OpCodeT16, IOpCode32BImm
{
public int Rn { get; }
public int Immediate { get; }
public long Immediate { get; }
public static new OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT16BImmCmp(inst, address, opCode);

31
ARMeilleure/Decoders/OpCodeT32MemImm8D.cs Normal file
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@ -0,0 +1,31 @@
namespace ARMeilleure.Decoders
{
class OpCodeT32MemImm8D : OpCodeT32, IOpCode32Mem
{
public int Rt { get; }
public int Rt2 { get; }
public int Rn { get; }
public bool WBack { get; }
public bool IsLoad { get; }
public bool Index { get; }
public bool Add { get; }
public int Immediate { get; }
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT32MemImm8D(inst, address, opCode);
public OpCodeT32MemImm8D(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
Rt2 = (opCode >> 8) & 0xf;
Rt = (opCode >> 12) & 0xf;
Rn = (opCode >> 16) & 0xf;
Index = ((opCode >> 24) & 1) != 0;
Add = ((opCode >> 23) & 1) != 0;
WBack = ((opCode >> 21) & 1) != 0;
Immediate = opCode & 0xff;
IsLoad = ((opCode >> 20) & 1) != 0;
}
}
}

24
ARMeilleure/Decoders/OpCodeT32MemLdEx.cs Normal file
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@ -0,0 +1,24 @@
namespace ARMeilleure.Decoders
{
class OpCodeT32MemLdEx : OpCodeT32, IOpCode32MemEx
{
public int Rd => 0;
public int Rt { get; }
public int Rn { get; }
public bool WBack => false;
public bool IsLoad => true;
public bool Index => false;
public bool Add => false;
public int Immediate => 0;
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT32MemLdEx(inst, address, opCode);
public OpCodeT32MemLdEx(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
Rt = (opCode >> 12) & 0xf;
Rn = (opCode >> 16) & 0xf;
}
}
}

52
ARMeilleure/Decoders/OpCodeT32MemMult.cs Normal file
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@ -0,0 +1,52 @@
using System.Numerics;
namespace ARMeilleure.Decoders
{
class OpCodeT32MemMult : OpCodeT32, IOpCode32MemMult
{
public int Rn { get; }
public int RegisterMask { get; }
public int Offset { get; }
public int PostOffset { get; }
public bool IsLoad { get; }
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT32MemMult(inst, address, opCode);
public OpCodeT32MemMult(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
Rn = (opCode >> 16) & 0xf;
bool isLoad = (opCode & (1 << 20)) != 0;
bool w = (opCode & (1 << 21)) != 0;
bool u = (opCode & (1 << 23)) != 0;
bool p = (opCode & (1 << 24)) != 0;
RegisterMask = opCode & 0xffff;
int regsSize = BitOperations.PopCount((uint)RegisterMask) * 4;
if (!u)
{
Offset -= regsSize;
}
if (u == p)
{
Offset += 4;
}
if (w)
{
PostOffset = u ? regsSize : -regsSize;
}
else
{
PostOffset = 0;
}
IsLoad = isLoad;
}
}
}

30
ARMeilleure/Decoders/OpCodeT32MemRsImm.cs Normal file
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@ -0,0 +1,30 @@
namespace ARMeilleure.Decoders
{
class OpCodeT32MemRsImm : OpCodeT32, IOpCode32MemRsImm
{
public int Rt { get; }
public int Rn { get; }
public int Rm { get; }
public ShiftType ShiftType => ShiftType.Lsl;
public bool WBack => false;
public bool IsLoad { get; }
public bool Index => true;
public bool Add => true;
public int Immediate { get; }
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT32MemRsImm(inst, address, opCode);
public OpCodeT32MemRsImm(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
Rm = (opCode >> 0) & 0xf;
Rt = (opCode >> 12) & 0xf;
Rn = (opCode >> 16) & 0xf;
IsLoad = (opCode & (1 << 20)) != 0;
Immediate = (opCode >> 4) & 3;
}
}
}

25
ARMeilleure/Decoders/OpCodeT32MemStEx.cs Normal file
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@ -0,0 +1,25 @@
namespace ARMeilleure.Decoders
{
class OpCodeT32MemStEx : OpCodeT32, IOpCode32MemEx
{
public int Rd { get; }
public int Rt { get; }
public int Rn { get; }
public bool WBack => false;
public bool IsLoad => false;
public bool Index => false;
public bool Add => false;
public int Immediate => 0;
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT32MemStEx(inst, address, opCode);
public OpCodeT32MemStEx(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
Rd = (opCode >> 0) & 0xf;
Rt = (opCode >> 12) & 0xf;
Rn = (opCode >> 16) & 0xf;
}
}
}

10
ARMeilleure/Decoders/OpCodeTable.cs
View file

@ -1070,14 +1070,19 @@ namespace ARMeilleure.Decoders
SetT32("11110x011011xxxx0xxx1111xxxxxxxx", InstName.Cmp, InstEmit32.Cmp, OpCodeT32AluImm.Create);
SetT32("11101010100<xxxx0xxx<<<<xxxxxxxx", InstName.Eor, InstEmit32.Eor, OpCodeT32AluRsImm.Create);
SetT32("11110x00100<xxxx0xxx<<<<xxxxxxxx", InstName.Eor, InstEmit32.Eor, OpCodeT32AluImm.Create);
SetT32("111010001101xxxxxxxx111111101111", InstName.Ldaex, InstEmit32.Ldaex, OpCodeT32MemLdEx.Create);
SetT32("1110100010x1xxxxxxxxxxxxxxxxxxxx", InstName.Ldm, InstEmit32.Ldm, OpCodeT32MemMult.Create);
SetT32("1110100100x1xxxxxxxxxxxxxxxxxxxx", InstName.Ldm, InstEmit32.Ldm, OpCodeT32MemMult.Create);
SetT32("111110000101xxxx<<<<10x1xxxxxxxx", InstName.Ldr, InstEmit32.Ldr, OpCodeT32MemImm8.Create);
SetT32("111110000101xxxx<<<<1100xxxxxxxx", InstName.Ldr, InstEmit32.Ldr, OpCodeT32MemImm8.Create);
SetT32("111110000101xxxx<<<<11x1xxxxxxxx", InstName.Ldr, InstEmit32.Ldr, OpCodeT32MemImm8.Create);
SetT32("111110001101xxxxxxxxxxxxxxxxxxxx", InstName.Ldr, InstEmit32.Ldr, OpCodeT32MemImm12.Create);
SetT32("111110000101<<<<xxxx000000xxxxxx", InstName.Ldr, InstEmit32.Ldr, OpCodeT32MemRsImm.Create);
SetT32("111110000001xxxx<<<<10x1xxxxxxxx", InstName.Ldrb, InstEmit32.Ldrb, OpCodeT32MemImm8.Create);
SetT32("111110000001xxxx<<<<1100xxxxxxxx", InstName.Ldrb, InstEmit32.Ldrb, OpCodeT32MemImm8.Create);
SetT32("111110000001xxxx<<<<11x1xxxxxxxx", InstName.Ldrb, InstEmit32.Ldrb, OpCodeT32MemImm8.Create);
SetT32("111110001001xxxxxxxxxxxxxxxxxxxx", InstName.Ldrb, InstEmit32.Ldrb, OpCodeT32MemImm12.Create);
SetT32("1110100>x1>1<<<<xxxxxxxxxxxxxxxx", InstName.Ldrd, InstEmit32.Ldrd, OpCodeT32MemImm8D.Create);
SetT32("111110000011xxxx<<<<10x1xxxxxxxx", InstName.Ldrh, InstEmit32.Ldrh, OpCodeT32MemImm8.Create);
SetT32("111110000011xxxx<<<<1100xxxxxxxx", InstName.Ldrh, InstEmit32.Ldrh, OpCodeT32MemImm8.Create);
SetT32("111110000011xxxx<<<<11x1xxxxxxxx", InstName.Ldrh, InstEmit32.Ldrh, OpCodeT32MemImm8.Create);
@ -1102,10 +1107,15 @@ namespace ARMeilleure.Decoders
SetT32("11110x01110xxxxx0xxxxxxxxxxxxxxx", InstName.Rsb, InstEmit32.Rsb, OpCodeT32AluImm.Create);
SetT32("11101011011xxxxx0xxxxxxxxxxxxxxx", InstName.Sbc, InstEmit32.Sbc, OpCodeT32AluRsImm.Create);
SetT32("11110x01011xxxxx0xxxxxxxxxxxxxxx", InstName.Sbc, InstEmit32.Sbc, OpCodeT32AluImm.Create);
SetT32("111010001100xxxxxxxx11111110xxxx", InstName.Stlex, InstEmit32.Stlex, OpCodeT32MemStEx.Create);
SetT32("1110100010x0xxxx0xxxxxxxxxxxxxxx", InstName.Stm, InstEmit32.Stm, OpCodeT32MemMult.Create);
SetT32("1110100100x0xxxx0xxxxxxxxxxxxxxx", InstName.Stm, InstEmit32.Stm, OpCodeT32MemMult.Create);
SetT32("111110000100xxxxxxxx1<<>xxxxxxxx", InstName.Str, InstEmit32.Str, OpCodeT32MemImm8.Create);
SetT32("111110001100xxxxxxxxxxxxxxxxxxxx", InstName.Str, InstEmit32.Str, OpCodeT32MemImm12.Create);
SetT32("111110000100<<<<xxxx000000xxxxxx", InstName.Str, InstEmit32.Str, OpCodeT32MemRsImm.Create);
SetT32("111110000000xxxxxxxx1<<>xxxxxxxx", InstName.Strb, InstEmit32.Strb, OpCodeT32MemImm8.Create);
SetT32("111110001000xxxxxxxxxxxxxxxxxxxx", InstName.Strb, InstEmit32.Strb, OpCodeT32MemImm12.Create);
SetT32("1110100>x1>0<<<<xxxxxxxxxxxxxxxx", InstName.Strd, InstEmit32.Strd, OpCodeT32MemImm8D.Create);
SetT32("111110000010xxxxxxxx1<<>xxxxxxxx", InstName.Strh, InstEmit32.Strh, OpCodeT32MemImm8.Create);
SetT32("111110001010xxxxxxxxxxxxxxxxxxxx", InstName.Strh, InstEmit32.Strh, OpCodeT32MemImm12.Create);
SetT32("11101011101<xxxx0xxx<<<<xxxxxxxx", InstName.Sub, InstEmit32.Sub, OpCodeT32AluRsImm.Create);

2
ARMeilleure/Instructions/InstEmitFlow32.cs
View file

@ -88,7 +88,7 @@ namespace ARMeilleure.Instructions
{
OpCodeT16BImmCmp op = (OpCodeT16BImmCmp)context.CurrOp;
Operand value = GetIntOrZR(context, op.Rn);
Operand value = GetIntA32(context, op.Rn);
Operand lblTarget = context.GetLabel((ulong)op.Immediate);
if (onNotZero)

4
ARMeilleure/Instructions/InstEmitMemoryHelper.cs
View file

@ -547,7 +547,7 @@ namespace ARMeilleure.Instructions
{
switch (context.CurrOp)
{
case OpCode32MemRsImm op: return GetMShiftedByImmediate(context, op, setCarry);
case IOpCode32MemRsImm op: return GetMShiftedByImmediate(context, op, setCarry);
case IOpCode32MemReg op: return GetIntA32(context, op.Rm);
@ -564,7 +564,7 @@ namespace ARMeilleure.Instructions
return new InvalidOperationException($"Invalid OpCode type \"{opCode?.GetType().Name ?? "null"}\".");
}
public static Operand GetMShiftedByImmediate(ArmEmitterContext context, OpCode32MemRsImm op, bool setCarry)
public static Operand GetMShiftedByImmediate(ArmEmitterContext context, IOpCode32MemRsImm op, bool setCarry)
{
Operand m = GetIntA32(context, op.Rm);