Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
FLDCW/FSTCW Instructions
 ◄Summary►                                   ◄Up► ◄Contents► ◄Index► ◄Back►
────────────────┬─────────────────────────┬─────────────────────────────────
 FLDCW mem16    │ fldcw  ctrlword         │  87 (7-14)+EA
                │                         │ 287 7-14
                │                         │ 387 19
                │                         │ 486 4
────────────────┼─────────────────────────┼─────────────────────────────────
 FSTCW mem16    │ fstcw  ctrlword         │  87 12-18
 FNSTCW mem16   │                         │ 287 12-18
                │                         │ 387 15
                │                         │ 486 3
────────────────┴─────────────────────────┴─────────────────────────────────
 
  NOTE: The timings reflect the no-wait version of the FSTCW. The wait
        version may take additional clock cycles.
                                    -♦-