diff options
Diffstat (limited to 'ChocolArm64/Decoders/OpCodeSimdMemMs64.cs')
| -rw-r--r-- | ChocolArm64/Decoders/OpCodeSimdMemMs64.cs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/ChocolArm64/Decoders/OpCodeSimdMemMs64.cs b/ChocolArm64/Decoders/OpCodeSimdMemMs64.cs new file mode 100644 index 00000000..0748ef43 --- /dev/null +++ b/ChocolArm64/Decoders/OpCodeSimdMemMs64.cs @@ -0,0 +1,49 @@ +using ChocolArm64.Instructions; +using ChocolArm64.State; + +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; + } + } +}
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