Changeset 10264:c3977836244e
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sim: stopgap for race-conditions when using multiple EventQueues

This patch fixes several race conditions that appear in multi-
threaded mode. Currently the decode cache race condition is
fixed only for x86, and in a temporary non-optimal fashion. We
still need to decide on a more optimal solution for the decode
cache and apply it to all the ISAs.

- Quick regression tests on x86, arm, alpha
- Made sure that sparc, power, mips can be built with this patch
- Tested using up to 28 EventQueues (28 threads)