While it makes little sense for the end product to have a group
containing only a single pattern, avoiding this case within an
incremental patch set is troublesome.
Because this is expected to be a transient condition, do not
bother "optimizing" this case, e.g. by folding away the group.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This is an edge case for sure, but the logic that disallowed
this case was faulty. Further, a few fixes scattered about
can allow this to work.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Call this form a "parameter", returning a value extracted
from the DisasContext.
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Previously this would result in an exception for shifting
the field mask by a negative number.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This adds one test that supposed to succeed to test deep nesting
of pattern groups which is rarely exercised by targets using decode
tree. The remaining tests exercise various fail conditions.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-Id: <20190227120217.20794-1-kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
To be used to decode ARM SVE, but could be used for any fixed-width ISA.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
