FTST              Test for Zero               Exception Flags: I D

FTST

       Logic:      ST . ST - 0.0

     FTST compares ST to 0.0. The result of the floating-point comparison is
     left in the condition codes:

                        C3 C0 Means
                        -- -- -----
                        0  0  ST > 0
                        0  1  ST < 0
                        1  0  ST = . 0
                        1  1  ST is not comparable

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   Operands            Clocks         Bytes           Example
   FTST                38-48            3             FTST
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