[PATCH] D136759: [AArch64][SVE2] Add the SVE2.1 while & pext predicate pair instructions

[David Sherwood via Phabricator via llvm-commits]

david-arm created this revision.
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This patch adds the assembly/disassembly for the following
predicate pair instructions:

pext:     Set pair of predicates from predicate-as-counter
whilelt: While incrementing signed scalar less than scalar
whilele: While incrementing signed scalar less than or equal to scalar
whilegt: While incrementing signed scalar greater than scalar
whilege: While incrementing signed scalar greater than or equal to scalar
whilelo: While incrementing unsigned scalar lower than scalar
whilels: While incrementing unsigned scalar lower or same as scalar
whilehs: While decrementing unsigned scalar higher or same as scalar
whilehi: While decrementing unsigned scalar higher than scalar

The reference can be found here:
https://developer.arm.com/documentation/ddi0602/2022-09


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136759

Files:
  llvm/lib/Target/AArch64/AArch64RegisterInfo.td
  llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
  llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
  llvm/lib/Target/AArch64/Disassembler/AArch64Disassembler.cpp
  llvm/lib/Target/AArch64/MCTargetDesc/AArch64InstPrinter.cpp
  llvm/lib/Target/AArch64/SVEInstrFormats.td
  llvm/test/MC/AArch64/SVE2p1/pext-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/pext.s
  llvm/test/MC/AArch64/SVE2p1/whilege-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/whilege.s
  llvm/test/MC/AArch64/SVE2p1/whilegt-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/whilegt.s
  llvm/test/MC/AArch64/SVE2p1/whilehi-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/whilehi.s
  llvm/test/MC/AArch64/SVE2p1/whilehs-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/whilehs.s
  llvm/test/MC/AArch64/SVE2p1/whilele-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/whilele.s
  llvm/test/MC/AArch64/SVE2p1/whilelo-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/whilelo.s
  llvm/test/MC/AArch64/SVE2p1/whilels-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/whilels.s
  llvm/test/MC/AArch64/SVE2p1/whilelt-diagnostics.s
  llvm/test/MC/AArch64/SVE2p1/whilelt.s

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