diff options
Diffstat (limited to 'ChocolArm64/Decoders/OpCodeSimdMemSs64.cs')
| -rw-r--r-- | ChocolArm64/Decoders/OpCodeSimdMemSs64.cs | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/ChocolArm64/Decoders/OpCodeSimdMemSs64.cs b/ChocolArm64/Decoders/OpCodeSimdMemSs64.cs new file mode 100644 index 00000000..07ec8ab7 --- /dev/null +++ b/ChocolArm64/Decoders/OpCodeSimdMemSs64.cs @@ -0,0 +1,98 @@ +using ChocolArm64.Instructions; +using ChocolArm64.State; + +namespace ChocolArm64.Decoders +{ + class OpCodeSimdMemSs64 : OpCodeMemReg64, IOpCodeSimd64 + { + public int SElems { get; private set; } + public int Index { get; private set; } + public bool Replicate { get; private set; } + public bool WBack { get; private set; } + + public OpCodeSimdMemSs64(Inst inst, long position, int opCode) : base(inst, position, opCode) + { + int size = (opCode >> 10) & 3; + int s = (opCode >> 12) & 1; + int sElems = (opCode >> 12) & 2; + int scale = (opCode >> 14) & 3; + int l = (opCode >> 22) & 1; + int q = (opCode >> 30) & 1; + + sElems |= (opCode >> 21) & 1; + + sElems++; + + int index = (q << 3) | (s << 2) | size; + + switch (scale) + { + case 1: + { + if ((size & 1) != 0) + { + inst = Inst.Undefined; + + return; + } + + index >>= 1; + + break; + } + + case 2: + { + if ((size & 2) != 0 || + ((size & 1) != 0 && s != 0)) + { + inst = Inst.Undefined; + + return; + } + + if ((size & 1) != 0) + { + index >>= 3; + + scale = 3; + } + else + { + index >>= 2; + } + + break; + } + + case 3: + { + if (l == 0 || s != 0) + { + inst = Inst.Undefined; + + return; + } + + scale = size; + + Replicate = true; + + break; + } + } + + Index = index; + SElems = sElems; + Size = scale; + + Extend64 = false; + + WBack = ((opCode >> 23) & 1) != 0; + + RegisterSize = q != 0 + ? State.RegisterSize.Simd128 + : State.RegisterSize.Simd64; + } + } +}
\ No newline at end of file |