x86: Add support for loading 32-bit and 80-bit floats in the x87
x86: Add support for FLDENV & FNSTENV
x86: Add support for FXSAVE, FXSAVE64, FXRSTOR, and FXRSTOR64
x86: Add support for FILD/FIST/FISTP
x86: Add support for FADD & FSUB