FD         STD         Set DF flag


Description

Sets the DF flag in the EFLAGS register. When the DF flag is set to 1, string operations decrement the index registers (ESI and/or EDI).


Operands        Bytes                Clocks

               1                2   NP


Flags

The DF flag is set. The CF, OF, ZF, SF, AF, and PF flags are unaffected.

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