GNU Info

(nasm.info)Section B.4.64

---

Next: Section B.4.65 Prev: Section B.4.63 Up: Section B.4

---

Enter node , (file) or (file)node

B.4.64. `EMMS': Empty MMX State
-------------------------------

     EMMS                          ; 0F 77                [PENT,MMX]

   `EMMS' sets the FPU tag word (marking which floating-point registers
are available) to all ones, meaning all registers are available for the
FPU to use. It should be used after executing `MMX' instructions and
before executing any subsequent floating-point operations.