Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
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FSQRT Instruction
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  Title:    Square Root
 
  Syntax:   FSQRT
 
  See also: FSCALE
 
  Description:
 
     Replaces the value of ST with its square root. The square root
     of -0 is -0.
                                    -♦-