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T16: Implement PUSH, POP

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merry 2022-02-11 21:04:28 +00:00
parent dabb5f2449
commit 34290d38e2
5 changed files with 50 additions and 3 deletions
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2
ARMeilleure/Decoders/IOpCode32MemMult.cs
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@ -9,5 +9,7 @@ namespace ARMeilleure.Decoders
int PostOffset { get; } int PostOffset { get; }
bool IsLoad { get; } bool IsLoad { get; }
int Offset { get; }
} }
} }

41
ARMeilleure/Decoders/OpCodeT16MemStack.cs Normal file
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@ -0,0 +1,41 @@
using ARMeilleure.Instructions;
using System;
using System.Numerics;
namespace ARMeilleure.Decoders
{
class OpCodeT16MemStack : OpCodeT16, IOpCode32MemMult
{
public int Rn => 13;
public int RegisterMask { get; }
public int PostOffset { get; }
public bool IsLoad { get; }
public int Offset { get; }
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode, bool inITBlock) => new OpCodeT16MemStack(inst, address, opCode, inITBlock);
public OpCodeT16MemStack(InstDescriptor inst, ulong address, int opCode, bool inITBlock) : base(inst, address, opCode, inITBlock)
{
int extra = (opCode >> 8) & 1;
int regCount = BitOperations.PopCount((uint)opCode & 0x1ff);
switch (inst.Name)
{
case InstName.Push:
RegisterMask = (opCode & 0xff) | (extra << 14);
IsLoad = false;
Offset = -4 * regCount;
PostOffset = -4 * regCount;
break;
case InstName.Pop:
RegisterMask = (opCode & 0xff) | (extra << 15);
IsLoad = true;
Offset = 0;
PostOffset = 4 * regCount;
break;
default:
throw new InvalidOperationException();
}
}
}
}

2
ARMeilleure/Decoders/OpCodeTable.cs
View file

@ -1030,7 +1030,9 @@ namespace ARMeilleure.Decoders
SetT16("1011001010xxxxxx", InstName.Uxth, InstEmit32.Uxth, OpCodeT16AluUx.Create); SetT16("1011001010xxxxxx", InstName.Uxth, InstEmit32.Uxth, OpCodeT16AluUx.Create);
SetT16("1011001011xxxxxx", InstName.Uxtb, InstEmit32.Uxtb, OpCodeT16AluUx.Create); SetT16("1011001011xxxxxx", InstName.Uxtb, InstEmit32.Uxtb, OpCodeT16AluUx.Create);
SetT16("101100x1xxxxxxxx", InstName.Cbz, InstEmit32.Cbz, OpCodeT16BImmCmp.Create); SetT16("101100x1xxxxxxxx", InstName.Cbz, InstEmit32.Cbz, OpCodeT16BImmCmp.Create);
SetT16("1011010xxxxxxxxx", InstName.Push, InstEmit32.Stm, OpCodeT16MemStack.Create);
SetT16("101110x1xxxxxxxx", InstName.Cbnz, InstEmit32.Cbnz, OpCodeT16BImmCmp.Create); SetT16("101110x1xxxxxxxx", InstName.Cbnz, InstEmit32.Cbnz, OpCodeT16BImmCmp.Create);
SetT16("1011110xxxxxxxxx", InstName.Pop, InstEmit32.Ldm, OpCodeT16MemStack.Create);
#endregion #endregion
FillFastLookupTable(InstA32FastLookup, AllInstA32, ToFastLookupIndexA); FillFastLookupTable(InstA32FastLookup, AllInstA32, ToFastLookupIndexA);

4
ARMeilleure/Instructions/InstEmitMemory32.cs
View file

@ -32,7 +32,7 @@ namespace ARMeilleure.Instructions
public static void Ldm(ArmEmitterContext context) public static void Ldm(ArmEmitterContext context)
{ {
OpCode32MemMult op = (OpCode32MemMult)context.CurrOp; IOpCode32MemMult op = (IOpCode32MemMult)context.CurrOp;
Operand n = GetIntA32(context, op.Rn); Operand n = GetIntA32(context, op.Rn);
@ -95,7 +95,7 @@ namespace ARMeilleure.Instructions
public static void Stm(ArmEmitterContext context) public static void Stm(ArmEmitterContext context)
{ {
OpCode32MemMult op = (OpCode32MemMult)context.CurrOp; IOpCode32MemMult op = (IOpCode32MemMult)context.CurrOp;
Operand n = context.Copy(GetIntA32(context, op.Rn)); Operand n = context.Copy(GetIntA32(context, op.Rn));

2
ARMeilleure/Instructions/InstName.cs
View file

@ -512,6 +512,8 @@ namespace ARMeilleure.Instructions
Mvn, Mvn,
Pkh, Pkh,
Pld, Pld,
Pop,
Push,
Rev, Rev,
Revsh, Revsh,
Rsb, Rsb,