| CVTSS2SD Reg Reg -- F32 to F64
| CVTSD2SS Reg Reg -- F64 to F32
- | CVTSS2SI Operand Reg -- F32 to I32/I64 (with rounding)
- | CVTSD2SI Operand Reg -- F64 to I32/I64 (with rounding)
+ | CVTTSS2SIQ Operand Reg -- F32 to I32/I64 (with truncation)
+ | CVTTSD2SIQ Operand Reg -- F64 to I32/I64 (with truncation)
| CVTSI2SS Operand Reg -- I32/I64 to F32
| CVTSI2SD Operand Reg -- I32/I64 to F64