Adds "Vector Advanced Encryption Standard" instruction set.
These are added via the `opcodesextra` mechanism #345, since they're missing
from the opcodes database.
Contributed by @vsivsi. Extracted from #349 with minor tweaks.
Co-authored-by: Vaughn Iverson <vsivsi@yahoo.com>
Adds support for the GFNI "Galois Field New Instructions" instruction set.
These instructions are not included in the Opcodes database, therefore they're
added using the "extras" mechanism introduced in #345.
For simplicity, the loading phase is updated slightly so that AVX-512 form
expansion rules are applied after extras are added to the list. This greatly
reduces the number of forms that have to be specified by hand.
Based on #343Fixes#335
Co-authored-by: Klaus Post <klauspost@gmail.com>
Supporting extra instructions not included in the Opcodes database is
currently a challenge. Short of migrating to an entirely different source
(such as #23), the options are either to patch the XML data file or to append
additional instructions at the loading phase.
An example of patching the XML was shown in the as-yet unlanded PR #234. This
shows the XML patching approach is unwieldy and requires more information than
we actually need (for example instruction form encodings).
In #335 we discussed the alternative of adding extra instructions during
loading. This has the advantage of using avo's simpler internal data
structure.
This PR prepares for using that approach by adding an `internal/opcodesextra`
package, intended to contain manually curated lists of extra instructions to
add to the instruction database during loading. At the moment, the only
instruction added here is the `MOVLQZX` instruction that's already handled
this way.
Updates #335#234#23
