FST               Store Real                  Exception Flags: I O U P

FST destination

       Logic:      destination . ST

     FST stores ST into destination. The destination can be a short or
     long real memory operand, or a coprocessor register, ST(i). If the value
     in ST is longer than the memory location, it is rounded according to the
     rounding control field, RC. (See FRNDINT for more information on
     rounding.)

  --------------------------------------------------------------------------
   Operands            Clocks         Bytes           Example
   FST  register       15-22            3             FST ST(1)
   FST  MEMORY_REAL    84-104+EA        5             FST REAL_NUMBER
  --------------------------------------------------------------------------

        Note:          If ST is tagged as special (i.e. if it contains .,
                       a NAN, or a denormal), it is not rounded before
                       storage; the least significant bits are dropped.