Intel i86W Manual page 115

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FLOATING-POINT INSTRUCTIONS
Programming Notes
In a pipelined graphics operation, if
fdest
is not
fO,
then
fdest
must not be the same as
fsrcl
or
fsrc2.
For best performance, the result of a scalar operation should not be a source operand in
the next instruction, unless the next instruction is a multiplier or adder operation.
6-27

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