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EXAMPLE
MULF R0, R0, R2
SD R0, 0(R11) (Store R0)
MULF R0, R4, R6
SD R0, 8(R11) (Store R0)
- Note that there is no data dependence between the MULF instructions, but
there is a WAR hazard (``anti-dependence'') between the first SD and the
second MULF.
- With the scoreboard scheme this results in a stall
- With Tomasulo's scheme it does not.
Paul H J Kelly
Mon Dec 1 20:07:28 GMT 1997