ChocolArm64/Decoders/OpCodeSimdMemMs64.cs

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using ChocolArm64.Instructions;
namespace ChocolArm64.Decoders
{
class OpCodeSimdMemMs64 : OpCodeMemReg64, IOpCodeSimd64
{
public int Reps { get; private set; }
public int SElems { get; private set; }
public int Elems { get; private set; }
public bool WBack { get; private set; }
public OpCodeSimdMemMs64(Inst inst, long position, int opCode) : base(inst, position, opCode)
{
switch ((opCode >> 12) & 0xf)
{
case 0b0000: Reps = 1; SElems = 4; break;
case 0b0010: Reps = 4; SElems = 1; break;
case 0b0100: Reps = 1; SElems = 3; break;
case 0b0110: Reps = 3; SElems = 1; break;
case 0b0111: Reps = 1; SElems = 1; break;
case 0b1000: Reps = 1; SElems = 2; break;
case 0b1010: Reps = 2; SElems = 1; break;
default: inst = Inst.Undefined; return;
}
Size = (opCode >> 10) & 3;
WBack = ((opCode >> 23) & 1) != 0;
bool q = ((opCode >> 30) & 1) != 0;
if (!q && Size == 3 && SElems != 1)
{
inst = Inst.Undefined;
return;
}
Extend64 = false;
RegisterSize = q
? State.RegisterSize.Simd128
: State.RegisterSize.Simd64;
Elems = (GetBitsCount() >> 3) >> Size;
}
}
}