FSQRT           Square root                          Exceptions: I D P
                                                     C3 C2 C1 C0: ? ? * ?
FSQRT

        Logic   ST ← square root (ST)

    FSQRT replaces the value in ST with its square root. ST must be
    greater than or equal to -0.0. The square root of -0.0 is -0.0.


    Opcode      Format
    D9 FA       FSQRT


    Timing
    Operand       8087         287        387      486     Pentium
    -           180-186      180-186    122-129   83-87    70      NP