Commit Graph

10 Commits

Author SHA1 Message Date
Richard Henderson af93ccacc7 decodetree: Extend argument set syntax to allow types
Rather than force all structure members to be 'int',
allow the type of the member to be specified.

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-01 11:45:35 -07:00
Richard Henderson acfdd2398d decodetree: Improve identifier matching
Only argument set members have to be C identifiers, everything
else gets prefixed during conversion to C.  Some places just
checked the leading character, and some places matched a leading
character plus a C identifier.

Convert everything to match full identifiers, including the
[&%@&] prefix, and drop the full C identifier requirement.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20200903192334.1603773-1-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-09-14 14:23:19 +01:00
Richard Henderson fe079aa13d decodetree: Drop check for less than 2 patterns in a group
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>
2020-06-09 09:19:48 -07:00
Richard Henderson 33c0f25bfd tests/decode: Test non-overlapping groups
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-06-08 11:09:48 -07:00
Richard Henderson b44b3449a0 decodetree: Allow group covering the entire insn space
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>
2020-06-08 10:36:47 -07:00
Richard Henderson 94597b6146 decodetree: Allow !function with no input bits
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>
2019-08-19 08:03:41 -07:00
Richard Henderson 2decfc9558 decodetree: Properly diagnose fields overflowing an insn
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>
2019-03-12 09:46:58 -07:00
Bastian Koppelmann bf92118fa9 test/decode: Add tests for PatternGroups
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>
2019-03-12 09:46:58 -07:00
Richard Henderson 0eff2df4a2 decodetree: Allow grouping of overlapping patterns
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-03-12 09:46:58 -07:00
Richard Henderson 568ae7efae scripts: Add decodetree.py
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>
2018-02-22 15:44:07 -08:00