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   ◄Summary►  ◄Timings►  ◄Example►
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Subtract
 
Syntax:  FSUB dest,src
 
Subtracts the source from the destination and returns the difference in
the destination. If two register operands are specified, one must be ST.
If a memory operand is specified, the result replaces the value in ST.
Memory operands can be 32- or 64-bit real numbers or 16- or 32-bit
integers. If no operand is specified, ST is subtracted from ST(1) and
the stack is popped, returning the difference in ST. For FSUBP, the
source must be ST; the difference (destination minus source) is returned
in the destination register and ST is popped.
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