Method FILD

FEXCore/Source/Interface/Core/OpcodeDispatcher/X87.cpp:97–126

}

void OpDispatchBuilder::FILD(OpcodeArgs) {
  const auto ReadWidth = OpSizeFromSrc(Op);
  // Read from memory
  Ref Data = LoadSource_WithOpSize(GPRClass, Op, Op->Src[0], ReadWidth, Op->Flags);

  // Sign extend to 64bits
  if (ReadWidth != OpSize::i64Bit) {
    Data = _Sbfe(OpSize::i64Bit, IR::OpSizeAsBits(ReadWidth), 0, Data);
  }

  // We're about to clobber flags to grab the sign, so save NZCV.
  SaveNZCV();

  // Extract sign and make integer absolute
  auto zero = Constant(0);
  _SubNZCV(OpSize::i64Bit, Data, zero);
  auto sign = _NZCVSelect(OpSize::i64Bit, CondClassType {COND_SLT}, Constant(0x8000), zero);
  auto absolute = _Neg(OpSize::i64Bit, Data, CondClassType {COND_MI});

  // left justify the absolute integer
  auto shift = Sub(OpSize::i64Bit, Constant(63), _FindMSB(IR::OpSize::i64Bit, absolute));
  auto shifted = _Lshl(OpSize::i64Bit, absolute, shift);

  auto adjusted_exponent = Sub(OpSize::i64Bit, Constant(0x3fff + 63), shift);
  auto zeroed_exponent = _Select(COND_EQ, absolute, zero, zero, adjusted_exponent);
  auto upper = _Or(OpSize::i64Bit, sign, zeroed_exponent);

  Ref ConvertedData = _VLoadTwoGPRs(shifted, upper);
  _PushStack(ConvertedData, Data, ReadWidth, false);
}

void OpDispatchBuilder::FST(OpcodeArgs, IR::OpSize Width) {
  const auto SourceSize = ReducedPrecisionMode ? OpSize::i64Bit : OpSize::i128Bit;