public static void Vtbl(ArmEmitterContext context)
{
OpCode32SimdTbl op = (OpCode32SimdTbl)context.CurrOp;
bool extension = op.Opc == 1;
int elems = op.GetBytesCount() >> op.Size;
int length = op.Length + 1;
(int Qx, int Ix)[] tableTuples = new (int, int)[length];
public static void Vtbl(ArmEmitterContext context)
{
OpCode32SimdTbl op = (OpCode32SimdTbl)context.CurrOp;
bool extension = op.Opc == 1;
int length = op.Length + 1;
if (Optimizations.UseSsse3)
{
Operand d = GetVecA32(op.Qd);
Operand m = EmitMoveDoubleWordToSide(context, GetVecA32(op.Qm), op.Vm, 0);
Operand res;
Operand mask = X86GetAllElements(context, 0x0707070707070707L);
// Fast path for single register table.
{
Operand n = EmitMoveDoubleWordToSide(context, GetVecA32(op.Qn), op.Vn, 0);
Operand mMask = context.AddIntrinsic(Intrinsic.X86Pcmpgtb, m, mask);
mMask = context.AddIntrinsic(Intrinsic.X86Por, mMask, m);
res = context.AddIntrinsic(Intrinsic.X86Pshufb, n, mMask);
}
for (int index = 1; index < length; index++)
{
int newVn = (op.Vn + index) & 0x1F;
(int qn, int ind) = GetQuadwordAndSubindex(newVn, op.RegisterSize);
Operand ni = EmitMoveDoubleWordToSide(context, GetVecA32(qn), newVn, 0);
Operand idxMask = X86GetAllElements(context, 0x0808080808080808L * index);
Operand mSubMask = context.AddIntrinsic(Intrinsic.X86Psubb, m, idxMask);
Operand mMask = context.AddIntrinsic(Intrinsic.X86Pcmpgtb, mSubMask, mask);
mMask = context.AddIntrinsic(Intrinsic.X86Por, mMask, mSubMask);
Operand res2 = context.AddIntrinsic(Intrinsic.X86Pshufb, ni, mMask);
res = context.AddIntrinsic(Intrinsic.X86Por, res, res2);
}
if (extension)
{
Operand idxMask = X86GetAllElements(context, (0x0808080808080808L * length) - 0x0101010101010101L);
Operand zeroMask = context.VectorZero();
Operand mPosMask = context.AddIntrinsic(Intrinsic.X86Pcmpgtb, m, idxMask);
Operand mNegMask = context.AddIntrinsic(Intrinsic.X86Pcmpgtb, zeroMask, m);
Operand mMask = context.AddIntrinsic(Intrinsic.X86Por, mPosMask, mNegMask);
Operand dMask = context.AddIntrinsic(Intrinsic.X86Pand, EmitMoveDoubleWordToSide(context, d, op.Vd, 0), mMask);
res = context.AddIntrinsic(Intrinsic.X86Por, res, dMask);
}
res = EmitMoveDoubleWordToSide(context, res, 0, op.Vd);
context.Copy(d, EmitDoubleWordInsert(context, d, res, op.Vd));
}
else
{
int elems = op.GetBytesCount() >> op.Size;
(int Qx, int Ix)[] tableTuples = new (int, int)[length];
