Displaying 1 result from an estimated 1 matches for "subextensions".
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2020 Feb 13
2
[RFC] Extension to TableGen's AssemblerPredicates to support combining features with ORs
...t
this stage I don't propose allowing ANDs and ORs to combine exist in the
same predicate, this can be revisited in the future if a need is found.
My initial motivation for this relates to the RISC-V backend and it's
upcoming bit manipulation extension. Internally this comprises of
several subextensions, each of which has its own SubtargetFeature. Some
of the instructions in this set require one of two of these target
features to be enabled for the instruction to be valid. Beyond this, I
can see such a feature will be useful elsewhere in the RISC-V backend as
different releases of the ISA would me...