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| author | Giacomo Travaglini <giacomo.travaglini@arm.com> | 2017-11-08 11:24:58 +0000 |
|---|---|---|
| committer | Giacomo Travaglini <giacomo.travaglini@arm.com> | 2018-02-05 09:44:22 +0000 |
| commit | 0c208d94cac1f89a04a5adb242327fa9fd13d70e (patch) | |
| tree | bd6ac77f925cd6348440aa5bdc3c235c91df2de6 | |
| parent | eea11aedcfe18b29d6e63243bc1acb51441ef523 (diff) | |
| download | gem5-0c208d94cac1f89a04a5adb242327fa9fd13d70e.tar.xz | |
cpu: MinorCPU handling IsSquashAfter flag
MinorCPU was not handling IsSquashAfter flagged instructions. The
behaviour was to force a branch (hence enforcing refetching) for
SerializeAfter instructions only. This has now been extended to
SquashAfter in order to correctly support ISB barrier instruction
behaviour.
Change-Id: Ie525b23350b0de121372d3b98b433e36b097d5c4
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/5702
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
| -rw-r--r-- | src/cpu/minor/execute.cc | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/cpu/minor/execute.cc b/src/cpu/minor/execute.cc index a38a7677a..7b76ca2e1 100644 --- a/src/cpu/minor/execute.cc +++ b/src/cpu/minor/execute.cc @@ -219,13 +219,14 @@ Execute::tryToBranch(MinorDynInstPtr inst, Fault fault, BranchData &branch) const TheISA::PCState &pc_before = inst->pc; TheISA::PCState target = thread->pcState(); - /* Force a branch for SerializeAfter instructions at the end of micro-op - * sequence when we're not suspended */ + /* Force a branch for SerializeAfter/SquashAfter instructions + * at the end of micro-op sequence when we're not suspended */ bool force_branch = thread->status() != ThreadContext::Suspended && !inst->isFault() && inst->isLastOpInInst() && (inst->staticInst->isSerializeAfter() || - inst->staticInst->isIprAccess()); + inst->staticInst->isSquashAfter() || + inst->staticInst->isIprAccess()); DPRINTF(Branch, "tryToBranch before: %s after: %s%s\n", pc_before, target, (force_branch ? " (forcing)" : "")); |