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| H A D | lsq_unit_impl.hh | 10149:45a67d84fd4a Tue Mar 25 14:15:00 EDT 2014 Marco Elver <marco.elver@ed.ac.uk> cpu: o3: lsq: Fix TSO implementation This patch fixes violation of TSO in the O3CPU, as all loads must be ordered with all other loads. In the LQ, if a snoop is observed, all subsequent loads need to be squashed if the system is TSO. Prior to this patch, the following case could be violated: P0 | P1 ; MOV [x],mail=/usr/spool/mail/nilay | MOV EAX,[y] ; MOV [y],mail=/usr/spool/mail/nilay | MOV EBX,[x] ; exists (1:EAX=1 /\ 1:EBX=0) [is a violation] The problem was found using litmus [http://diy.inria.fr]. Committed by: Nilay Vaish <nilay@cs.wisc.edu |
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