Command: FADDP - Floating-Point Addition
Arguments: OP: floating point register, ST0 optional and fix second argument
Usage: FADDP OP or FADDP OP, ST0
Effects: Adds the OP to ST0 and stores the result back to OP. Pops the register stack after storing the result.
Flags to be set: only FPU flags
Misc: The given two-operand forms are synonyms for the one-operand forms.