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A32: Implement VCVTT, VCVTB (#3710)

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* A32: Implement VCVTT, VCVTB

* A32: F16C implementation of VCVTT/VCVTB
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merry 2022-10-19 01:36:04 +01:00 • committed by GitHub
parent 5af8ce7c38
commit 8d41402fa6
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44
ARMeilleure/Decoders/OpCode32SimdCvtTB.cs Normal file
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@ -0,0 +1,44 @@
namespace ARMeilleure.Decoders
{
class OpCode32SimdCvtTB : OpCode32, IOpCode32Simd
{
public int Vd { get; }
public int Vm { get; }
public bool Op { get; } // Convert to Half / Convert from Half
public bool T { get; } // Top / Bottom
public int Size { get; } // Double / Single
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCode32SimdCvtTB(inst, address, opCode, false);
public static OpCode CreateT32(InstDescriptor inst, ulong address, int opCode) => new OpCode32SimdCvtTB(inst, address, opCode, true);
public OpCode32SimdCvtTB(InstDescriptor inst, ulong address, int opCode, bool isThumb) : base(inst, address, opCode)
{
IsThumb = isThumb;
Op = ((opCode >> 16) & 0x1) != 0;
T = ((opCode >> 7) & 0x1) != 0;
Size = ((opCode >> 8) & 0x1);
RegisterSize = Size == 1 ? RegisterSize.Int64 : RegisterSize.Int32;
if (Size == 1)
{
if (Op)
{
Vm = ((opCode >> 1) & 0x10) | ((opCode >> 0) & 0xf);
Vd = ((opCode >> 22) & 0x1) | ((opCode >> 11) & 0x1e);
}
else
{
Vm = ((opCode >> 5) & 0x1) | ((opCode << 1) & 0x1e);
Vd = ((opCode >> 18) & 0x10) | ((opCode >> 12) & 0xf);
}
}
else
{
Vm = ((opCode >> 5) & 0x1) | ((opCode << 1) & 0x1e);
Vd = ((opCode >> 22) & 0x1) | ((opCode >> 11) & 0x1e);
}
}
}
}

1
ARMeilleure/Decoders/OpCodeTable.cs
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@ -828,6 +828,7 @@ namespace ARMeilleure.Decoders
SetVfp("<<<<11101x11110xxxxx101x11x0xxxx", InstName.Vcvt, InstEmit32.Vcvt_FI, OpCode32SimdCvtFI.Create, OpCode32SimdCvtFI.CreateT32); // FP32 to int.
SetVfp("<<<<11101x111000xxxx101xx1x0xxxx", InstName.Vcvt, InstEmit32.Vcvt_FI, OpCode32SimdCvtFI.Create, OpCode32SimdCvtFI.CreateT32); // Int to FP32.
SetVfp("111111101x1111xxxxxx101xx1x0xxxx", InstName.Vcvt, InstEmit32.Vcvt_RM, OpCode32SimdCvtFI.Create, OpCode32SimdCvtFI.CreateT32); // The many FP32 to int encodings (fp).
SetVfp("<<<<11101x11001xxxxx101xx1x0xxxx", InstName.Vcvt, InstEmit32.Vcvt_TB, OpCode32SimdCvtTB.Create, OpCode32SimdCvtTB.CreateT32);
SetVfp("<<<<11101x00xxxxxxxx101xx0x0xxxx", InstName.Vdiv, InstEmit32.Vdiv_S, OpCode32SimdRegS.Create, OpCode32SimdRegS.CreateT32);
SetVfp("<<<<11101xx0xxxxxxxx1011x0x10000", InstName.Vdup, InstEmit32.Vdup, OpCode32SimdDupGP.Create, OpCode32SimdDupGP.CreateT32);
SetVfp("<<<<11101x10xxxxxxxx101xx0x0xxxx", InstName.Vfma, InstEmit32.Vfma_S, OpCode32SimdRegS.Create, OpCode32SimdRegS.CreateT32);

62
ARMeilleure/Instructions/InstEmitSimdCvt32.cs
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@ -261,6 +261,68 @@ namespace ARMeilleure.Instructions
}
}
public static void Vcvt_TB(ArmEmitterContext context)
{
OpCode32SimdCvtTB op = (OpCode32SimdCvtTB)context.CurrOp;
if (Optimizations.UseF16c)
{
Debug.Assert(!Optimizations.ForceLegacySse);
if (op.Op)
{
Operand res = ExtractScalar(context, op.Size == 1 ? OperandType.FP64 : OperandType.FP32, op.Vm);
if (op.Size == 1)
{
res = context.AddIntrinsic(Intrinsic.X86Cvtsd2ss, context.VectorZero(), res);
}
res = context.AddIntrinsic(Intrinsic.X86Vcvtps2ph, res, Const(X86GetRoundControl(FPRoundingMode.ToNearest)));
res = context.VectorExtract16(res, 0);
InsertScalar16(context, op.Vd, op.T, res);
}
else
{
Operand res = context.VectorCreateScalar(ExtractScalar16(context, op.Vm, op.T));
res = context.AddIntrinsic(Intrinsic.X86Vcvtph2ps, res);
if (op.Size == 1)
{
res = context.AddIntrinsic(Intrinsic.X86Cvtss2sd, context.VectorZero(), res);
}
res = context.VectorExtract(op.Size == 1 ? OperandType.I64 : OperandType.I32, res, 0);
InsertScalar(context, op.Vd, res);
}
}
else
{
if (op.Op)
{
// Convert to half
Operand src = ExtractScalar(context, op.Size == 1 ? OperandType.FP64 : OperandType.FP32, op.Vm);
MethodInfo method = op.Size == 1
? typeof(SoftFloat64_16).GetMethod(nameof(SoftFloat64_16.FPConvert))
: typeof(SoftFloat32_16).GetMethod(nameof(SoftFloat32_16.FPConvert));
Operand res = context.Call(method, src);
InsertScalar16(context, op.Vd, op.T, res);
}
else
{
// Convert from half
Operand src = ExtractScalar16(context, op.Vm, op.T);
MethodInfo method = op.Size == 1
? typeof(SoftFloat16_64).GetMethod(nameof(SoftFloat16_64.FPConvert))
: typeof(SoftFloat16_32).GetMethod(nameof(SoftFloat16_32.FPConvert));
Operand res = context.Call(method, src);
InsertScalar(context, op.Vd, res);
}
}
}
// VRINTA/M/N/P (floating-point).
public static void Vrint_RM(ArmEmitterContext context)
{

16
ARMeilleure/Instructions/InstEmitSimdHelper32.cs
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@ -70,6 +70,22 @@ namespace ARMeilleure.Instructions
context.Copy(vec, insert);
}
public static Operand ExtractScalar16(ArmEmitterContext context, int reg, bool top)
{
return context.VectorExtract16(GetVecA32(reg >> 2), ((reg & 3) << 1) | (top ? 1 : 0));
}
public static void InsertScalar16(ArmEmitterContext context, int reg, bool top, Operand value)
{
Debug.Assert(value.Type == OperandType.FP32 || value.Type == OperandType.I32);
Operand vec, insert;
vec = GetVecA32(reg >> 2);
insert = context.VectorInsert16(vec, value, ((reg & 3) << 1) | (top ? 1 : 0));
context.Copy(vec, insert);
}
public static Operand ExtractElement(ArmEmitterContext context, int reg, int size, bool signed)
{
return EmitVectorExtract32(context, reg >> (4 - size), reg & ((16 >> size) - 1), size, signed);