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2019-03-12decodetree: Properly diagnose fields overflowing an insnRichard Henderson
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>
2019-03-12test/decode: Add tests for PatternGroupsBastian Koppelmann
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>
2019-03-12decodetree: Allow grouping of overlapping patternsRichard Henderson
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-02-22scripts: Add decodetree.pyRichard Henderson
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>