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| author | Richard Henderson <richard.henderson@linaro.org> | 2019-02-27 18:34:38 -0800 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2019-03-12 09:46:58 -0700 |
| commit | 5d53b0f5d35248894bf7c223689e95600b88434e (patch) | |
| tree | 221a7445d047c8b0782fafa295c36fc017e4a8b4 | |
| parent | 3fdbf5d6794db253b0a5173204bbbcc8a17bc9d1 (diff) | |
decodetree: Document the usefulness of argument sets
Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| -rw-r--r-- | docs/devel/decodetree.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/devel/decodetree.rst b/docs/devel/decodetree.rst index d9be30b2db..62cb7f687c 100644 --- a/docs/devel/decodetree.rst +++ b/docs/devel/decodetree.rst @@ -69,6 +69,13 @@ with each of the fields being one of the member arguments. If ``!extern`` is specified, the backing structure is assumed to have been already declared, typically via a second decoder. +Argument sets are useful when one wants to define helper functions +for the translator functions that can perform operations on a common +set of arguments. This can ensure, for instance, that the ``AND`` +pattern and the ``OR`` pattern put their operands into the same named +structure, so that a common ``gen_logic_insn`` may be able to handle +the operations common between the two. + Argument set examples:: ®3 ra rb rc |