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2012 Nov 02
0
[LLVMdev] Alternate instruction encoding for subtargets - SOLVED
>> Can I tell tablegen to have two encodings and switch between them
>> using a predicate?
After some deliberations, I modified tablegen to generate several
versions of the GenCodeEmitter file. My tablegen now accepts a new
command line parameter called "emitter-instfld". This specifies the
name of the field in Instruction that holds the encoded bytes. In my
target's td files I simply specify both encodings at the same time.
This is my target's Instruction base class. It defines the traditional
field Inst and also an additional field Inst6 that holds...