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Summary: sext() modifier is supported in SDWA instructions only for integer operands. Spec is unclear should integer operands support abs and neg modifiers with sext - for now they are not supported. Renamed InputModsWithNoDefault to FloatInputMods. Added SextInputMods for operands that support sext() modifier. Added AMDGPUOperand::Modifier struct to handle register and immediate modifiers. Code cleaning in AMDGPUOperand class: organize method in groups (render-, predicate-methods...). Reviewers: vpykhtin, artem.tamazov, tstellarAMD Subscribers: arsenm, kzhuravl Differential Revision: http://reviews.llvm.org/D20968 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272384 91177308-0d34-0410-b5e6-96231b3b80d8
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