FSUBRP        Subtract Real Reversed and Pop    Exception Flags: I D O U P

SUBRP destination, source

       Logic:      ST(i) . ST - ST(i)
                   pop stack

     FSUBRP acts like FSUBP, except that it reverses the order of the
     operands. This instruction subtracts ST(i) from ST, leaves the
     result in ST(i), and pops the stack.

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   Operands            Clocks         Bytes           Example
   FSUBR ST(i), ST     75-105           3             FSUBR ST(1),ST
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