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> #Abstracted integer reg operands
> 'Dest': ('IntReg', 'uw', 'dest', 'IsInteger', 0,
> maybePCRead, maybePCWrite),
> 'Base': ('IntReg', 'uw', 'base', 'IsInteger', 1,
> maybePCRead, maybePCWrite),
> 'Index': ('IntReg', 'uw', 'index', 'IsInteger', 2,
> maybePCRead, maybePCWrite),