public override X86Instruction Decode(uint op, X86Disassembler disasm)
{
var ctx = disasm.decodingContext;
if ((ctx.SizeOverridePrefix | ctx.F2Prefix | ctx.F3Prefix) ||
!disasm.TryReadByte(out byte op2))
{
return(disasm.CreateInvalidInstruction());
}
var r = (~op2 >> 5) & 4;
var vvvv = (~op2 >> 3) & 0xF;
var pp = op2 & 3;
ctx.IsVex = true;
ctx.VexRegister = (byte)vvvv;
ctx.RegisterExtensionPrefixByte = (byte)r;
ctx.VexLong = (op2 & 4) != 0;
ctx.F2Prefix = pp == 3;
ctx.F3Prefix = pp == 2;
ctx.SizeOverridePrefix = pp == 1;
if (!disasm.TryReadByte(out op2) ||
op2 == 0x38 || op2 == 0x3A)
{
return(disasm.CreateInvalidInstruction());
}
return(decoders0F[op2].Decode(op2, disasm));
}