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ryujinx-final/ChocolArm64/Instruction/AInstEmitSimdShift.cs

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using ChocolArm64.Decoder;
using ChocolArm64.State;
using ChocolArm64.Translation;
using System;
using System.Reflection.Emit;
using static ChocolArm64.Instruction.AInstEmitSimdHelper;
namespace ChocolArm64.Instruction
{
static partial class AInstEmit
{
public static void Shl_S(AILEmitterCtx Context)
{
AOpCodeSimdShImm Op = (AOpCodeSimdShImm)Context.CurrOp;
EmitScalarUnaryOpZx(Context, () =>
{
Context.EmitLdc_I4(GetImmShl(Op));
Context.Emit(OpCodes.Shl);
});
}
public static void Shl_V(AILEmitterCtx Context)
{
AOpCodeSimdShImm Op = (AOpCodeSimdShImm)Context.CurrOp;
EmitVectorUnaryOpZx(Context, () =>
{
Context.EmitLdc_I4(GetImmShl(Op));
Context.Emit(OpCodes.Shl);
});
}
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public static void Shll_V(AILEmitterCtx Context)
{
AOpCodeSimd Op = (AOpCodeSimd)Context.CurrOp;
int Shift = 8 << Op.Size;
EmitVectorShImmWidenBinaryZx(Context, () => Context.Emit(OpCodes.Shl), Shift);
}
public static void Shrn_V(AILEmitterCtx Context)
{
AOpCodeSimdShImm Op = (AOpCodeSimdShImm)Context.CurrOp;
EmitVectorShImmNarrowBinaryZx(Context, () => Context.Emit(OpCodes.Shr_Un), GetImmShr(Op));
}
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public static void Sli_V(AILEmitterCtx Context)
{
AOpCodeSimdShImm Op = (AOpCodeSimdShImm)Context.CurrOp;
int Bytes = Op.GetBitsCount() >> 3;
int Elems = Bytes >> Op.Size;
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int Shift = GetImmShl(Op);
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ulong Mask = Shift != 0 ? ulong.MaxValue >> (64 - Shift) : 0;
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for (int Index = 0; Index < Elems; Index++)
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{
EmitVectorExtractZx(Context, Op.Rn, Index, Op.Size);
Context.EmitLdc_I4(Shift);
Context.Emit(OpCodes.Shl);
EmitVectorExtractZx(Context, Op.Rd, Index, Op.Size);
Context.EmitLdc_I8((long)Mask);
Context.Emit(OpCodes.And);
Context.Emit(OpCodes.Or);
EmitVectorInsert(Context, Op.Rd, Index, Op.Size);
}
if (Op.RegisterSize == ARegisterSize.SIMD64)
{
EmitVectorZeroUpper(Context, Op.Rd);
}
}
public static void Sqrshrn_V(AILEmitterCtx Context)
{
AOpCodeSimdShImm Op = (AOpCodeSimdShImm)Context.CurrOp;
int Shift = GetImmShr(Op);
long RoundConst = 1L << (Shift - 1);
Action Emit = () =>
{
Context.EmitLdc_I8(RoundConst);
Context.Emit(OpCodes.Add);
Context.EmitLdc_I4(Shift);
Context.Emit(OpCodes.Shr);
};
EmitVectorSaturatingNarrowOpSxSx(Context, Emit);
}
public static void Srshr_S(AILEmitterCtx Context)
{
EmitScalarShrImmOpSx(Context, ShrImmFlags.Round);
}
public static void Srshr_V(AILEmitterCtx Context)
{
EmitVectorShrImmOpSx(Context, ShrImmFlags.Round);
}
public static void Srsra_S(AILEmitterCtx Context)
{
EmitScalarShrImmOpSx(Context, ShrImmFlags.Round | ShrImmFlags.Accumulate);
}
public static void Srsra_V(AILEmitterCtx Context)
{
EmitVectorShrImmOpSx(Context, ShrImmFlags.Round | ShrImmFlags.Accumulate);
}
public static void Sshl_V(AILEmitterCtx Context)
{
EmitVectorShl(Context, Signed: true);
}
public static void Sshll_V(AILEmitterCtx Context)
{
AOpCodeSimdShImm Op = (AOpCodeSimdShImm)Context.CurrOp;
EmitVectorShImmWidenBinarySx(Context, () => Context.Emit(OpCodes.Shl), GetImmShl(Op));
}
public static void Sshr_S(AILEmitterCtx Context)
{
EmitShrImmOp(Context, ShrImmFlags.ScalarSx);
}
public static void Sshr_V(AILEmitterCtx Context)
{
EmitShrImmOp(Context, ShrImmFlags.VectorSx);
}
public static void Ssra_S(AILEmitterCtx Context)
{
EmitScalarShrImmOpSx(Context, ShrImmFlags.Accumulate);
}
public static void Ssra_V(AILEmitterCtx Context)
{
EmitVectorShrImmOpSx(Context, ShrImmFlags.Accumulate);
}
public static void Urshr_S(AILEmitterCtx Context)
{
EmitScalarShrImmOpZx(Context, ShrImmFlags.Round);
}
public static void Urshr_V(AILEmitterCtx Context)
{
EmitVectorShrImmOpZx(Context, ShrImmFlags.Round);
}
public static void Ursra_S(AILEmitterCtx Context)
{
EmitScalarShrImmOpZx(Context, ShrImmFlags.Round | ShrImmFlags.Accumulate);
}
public static void Ursra_V(AILEmitterCtx Context)
{
EmitVectorShrImmOpZx(Context, ShrImmFlags.Round | ShrImmFlags.Accumulate);
}
public static void Ushl_V(AILEmitterCtx Context)
{
EmitVectorShl(Context, Signed: false);
}
public static void Ushll_V(AILEmitterCtx Context)
{
AOpCodeSimdShImm Op = (AOpCodeSimdShImm)Context.CurrOp;
EmitVectorShImmWidenBinaryZx(Context, () => Context.Emit(OpCodes.Shl), GetImmShl(Op));
}
public static void Ushr_S(AILEmitterCtx Context)
{
EmitShrImmOp(Context, ShrImmFlags.ScalarZx);
}
public static void Ushr_V(AILEmitterCtx Context)
{
EmitShrImmOp(Context, ShrImmFlags.VectorZx);
}
public static void Usra_S(AILEmitterCtx Context)
{
EmitScalarShrImmOpZx(Context, ShrImmFlags.Accumulate);
}
public static void Usra_V(AILEmitterCtx Context)
{
EmitVectorShrImmOpZx(Context, ShrImmFlags.Accumulate);
}
private static void EmitVectorShl(AILEmitterCtx Context, bool Signed)
{
//This instruction shifts the value on vector A by the number of bits
//specified on the signed, lower 8 bits of vector B. If the shift value
//is greater or equal to the data size of each lane, then the result is zero.
//Additionally, negative shifts produces right shifts by the negated shift value.
AOpCodeSimd Op = (AOpCodeSimd)Context.CurrOp;
int MaxShift = 8 << Op.Size;
Action Emit = () =>
{
AILLabel LblShl = new AILLabel();
AILLabel LblZero = new AILLabel();
AILLabel LblEnd = new AILLabel();
void EmitShift(OpCode ILOp)
{
Context.Emit(OpCodes.Dup);
Context.EmitLdc_I4(MaxShift);
Context.Emit(OpCodes.Bge_S, LblZero);
Context.Emit(ILOp);
Context.Emit(OpCodes.Br_S, LblEnd);
}
Context.Emit(OpCodes.Conv_I1);
Context.Emit(OpCodes.Dup);
Context.EmitLdc_I4(0);
Context.Emit(OpCodes.Bge_S, LblShl);
Context.Emit(OpCodes.Neg);
EmitShift(Signed
? OpCodes.Shr
: OpCodes.Shr_Un);
Context.MarkLabel(LblShl);
EmitShift(OpCodes.Shl);
Context.MarkLabel(LblZero);
Context.Emit(OpCodes.Pop);
Context.Emit(OpCodes.Pop);
Context.EmitLdc_I8(0);
Context.MarkLabel(LblEnd);
};
if (Signed)
{
EmitVectorBinaryOpSx(Context, Emit);
}
else
{
EmitVectorBinaryOpZx(Context, Emit);
}
}
[Flags]
private enum ShrImmFlags
{
Scalar = 1 << 0,
Signed = 1 << 1,
Round = 1 << 2,
Accumulate = 1 << 3,
ScalarSx = Scalar | Signed,
ScalarZx = Scalar,
VectorSx = Signed,
VectorZx = 0
}
private static void EmitScalarShrImmOpSx(AILEmitterCtx Context, ShrImmFlags Flags)
{
EmitShrImmOp(Context, ShrImmFlags.ScalarSx | Flags);
}
private static void EmitScalarShrImmOpZx(AILEmitterCtx Context, ShrImmFlags Flags)
{
EmitShrImmOp(Context, ShrImmFlags.ScalarZx | Flags);
}
private static void EmitVectorShrImmOpSx(AILEmitterCtx Context, ShrImmFlags Flags)
{
EmitShrImmOp(Context, ShrImmFlags.VectorSx | Flags);
}
private static void EmitVectorShrImmOpZx(AILEmitterCtx Context, ShrImmFlags Flags)
{
EmitShrImmOp(Context, ShrImmFlags.VectorZx | Flags);
}
private static void EmitShrImmOp(AILEmitterCtx Context, ShrImmFlags Flags)
{
AOpCodeSimdShImm Op = (AOpCodeSimdShImm)Context.CurrOp;
bool Scalar = (Flags & ShrImmFlags.Scalar) != 0;
bool Signed = (Flags & ShrImmFlags.Signed) != 0;
bool Round = (Flags & ShrImmFlags.Round) != 0;
bool Accumulate = (Flags & ShrImmFlags.Accumulate) != 0;
int Shift = GetImmShr(Op);
long RoundConst = 1L << (Shift - 1);
int Bytes = Op.GetBitsCount() >> 3;
int Elems = !Scalar ? Bytes >> Op.Size : 1;
for (int Index = 0; Index < Elems; Index++)
{
EmitVectorExtract(Context, Op.Rn, Index, Op.Size, Signed);
if (Op.Size <= 2)
{
if (Round)
{
Context.EmitLdc_I8(RoundConst);
Context.Emit(OpCodes.Add);
}
Context.EmitLdc_I4(Shift);
Context.Emit(Signed ? OpCodes.Shr : OpCodes.Shr_Un);
}
else /* if (Op.Size == 3) */
{
EmitShrImm_64(Context, Signed, Round ? RoundConst : 0L, Shift);
}
if (Accumulate)
{
EmitVectorExtract(Context, Op.Rd, Index, Op.Size, Signed);
Context.Emit(OpCodes.Add);
}
EmitVectorInsertTmp(Context, Index, Op.Size);
}
Context.EmitLdvectmp();
Context.EmitStvec(Op.Rd);
if ((Op.RegisterSize == ARegisterSize.SIMD64) || Scalar)
{
EmitVectorZeroUpper(Context, Op.Rd);
}
}
// Dst_64 = (Int(Src_64, Signed) + RoundConst) >> Shift;
private static void EmitShrImm_64(
AILEmitterCtx Context,
bool Signed,
long RoundConst,
int Shift)
{
if (((AOpCodeSimd)Context.CurrOp).Size < 3)
{
throw new InvalidOperationException();
}
Context.EmitLdc_I8(RoundConst);
Context.EmitLdc_I4(Shift);
ASoftFallback.EmitCall(Context, Signed
? nameof(ASoftFallback.SignedShrImm_64)
: nameof(ASoftFallback.UnsignedShrImm_64));
}
private static void EmitVectorShImmNarrowBinarySx(AILEmitterCtx Context, Action Emit, int Imm)
{
EmitVectorShImmNarrowBinaryOp(Context, Emit, Imm, true);
}
private static void EmitVectorShImmNarrowBinaryZx(AILEmitterCtx Context, Action Emit, int Imm)
{
EmitVectorShImmNarrowBinaryOp(Context, Emit, Imm, false);
}
private static void EmitVectorShImmNarrowBinaryOp(AILEmitterCtx Context, Action Emit, int Imm, bool Signed)
{
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AOpCodeSimd Op = (AOpCodeSimd)Context.CurrOp;
int Elems = 8 >> Op.Size;
int Part = Op.RegisterSize == ARegisterSize.SIMD128 ? Elems : 0;
for (int Index = 0; Index < Elems; Index++)
{
EmitVectorExtract(Context, Op.Rn, Index, Op.Size + 1, Signed);
Context.EmitLdc_I4(Imm);
Emit();
EmitVectorInsert(Context, Op.Rd, Part + Index, Op.Size);
}
if (Part == 0)
{
EmitVectorZeroUpper(Context, Op.Rd);
}
}
private static void EmitVectorShImmWidenBinarySx(AILEmitterCtx Context, Action Emit, int Imm)
{
EmitVectorShImmWidenBinaryOp(Context, Emit, Imm, true);
}
private static void EmitVectorShImmWidenBinaryZx(AILEmitterCtx Context, Action Emit, int Imm)
{
EmitVectorShImmWidenBinaryOp(Context, Emit, Imm, false);
}
private static void EmitVectorShImmWidenBinaryOp(AILEmitterCtx Context, Action Emit, int Imm, bool Signed)
{
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AOpCodeSimd Op = (AOpCodeSimd)Context.CurrOp;
int Elems = 8 >> Op.Size;
int Part = Op.RegisterSize == ARegisterSize.SIMD128 ? Elems : 0;
for (int Index = 0; Index < Elems; Index++)
{
EmitVectorExtract(Context, Op.Rn, Part + Index, Op.Size, Signed);
Context.EmitLdc_I4(Imm);
Emit();
EmitVectorInsertTmp(Context, Index, Op.Size + 1);
}
Context.EmitLdvectmp();
Context.EmitStvec(Op.Rd);
}
}
}