[PATCH] D131389: [AArch64] Add Missing v8.8a ALLINT PSTATE

[Sam Elliott via Phabricator via llvm-commits]

lenary created this revision.
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I noticed, on close reading of the Arm ARM, that llvm is missing
assembly support for a recently-added PSTATE: ALLINT from FEAT_NMI.

This patch:

- Adds the missing PSTATE
- Aligns the decoder more closely with the Arm ARM Decoder pseudocode, including allowing 4-bit immediates for all PSTATES except those explicitly noted (ALLINT, and the SVCRs that we handle separately).
- Tries to centralise the information about the immediates accepted by a given named PSTATE, rather than spreading it around the LLVM codebase.
- Updates tests for existing pstates to reflect these changes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D131389

Files:
  llvm/lib/Target/AArch64/AArch64.td
  llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
  llvm/lib/Target/AArch64/AArch64SystemOperands.td
  llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
  llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp
  llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h
  llvm/test/MC/AArch64/armv8.1a-pan.s
  llvm/test/MC/AArch64/armv8.2a-uao.s
  llvm/test/MC/AArch64/armv8.4a-dit.s
  llvm/test/MC/AArch64/armv8.5a-ssbs-error.s
  llvm/test/MC/AArch64/armv8.8a-nmi-error.s
  llvm/test/MC/AArch64/armv8.8a-nmi.s
  llvm/test/MC/Disassembler/AArch64/armv8.1a-pan.txt
  llvm/test/MC/Disassembler/AArch64/armv8.2a-uao.txt
  llvm/test/MC/Disassembler/AArch64/armv8.8a-nmi.txt

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