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FXCH Exchange Registers Exception Flags: I
FXCH [destination]
Logic: T1 . ST(i)
ST(i) . ST
ST . T1
FXCH exchanges the contents of ST with the contents of the
destination register. If no destination is specified, ST is
exchanged with ST(1).
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Operands Clocks Bytes Example
FXCH register 10-15 3 FXCH ST(2)
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Note: Many coprocessor instructions only use ST. This
instruction provides an easy way of moving an operand
into ST, while saving ST's original contents.
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