[PATCH] D62000: [AArch64][SVE2] Asm: add int halving add/sub (predicated) instructions

[Cullen Rhodes via Phabricator via llvm-commits]

c-rhodes created this revision.
c-rhodes added reviewers: sdesmalen, SjoerdMeijer, ostannard, rovka.
Herald added subscribers: kristof.beyls, tschuett, javed.absar.
Herald added a project: LLVM.

This patch adds support for the predicated integer halving add/sub
instructions:

- SHADD, UHADD, SRHADD, URHADD
- SHSUB, UHSUB, SHSUBR, UHSUBR

The specification can be found here:
https://developer.arm.com/docs/ddi0602/latest


Repository:
  rL LLVM

https://reviews.llvm.org/D62000

Files:
  lib/Target/AArch64/AArch64SVEInstrInfo.td
  lib/Target/AArch64/SVEInstrFormats.td
  test/MC/AArch64/SVE2/shadd-diagnostics.s
  test/MC/AArch64/SVE2/shadd.s
  test/MC/AArch64/SVE2/shsub-diagnostics.s
  test/MC/AArch64/SVE2/shsub.s
  test/MC/AArch64/SVE2/shsubr-diagnostics.s
  test/MC/AArch64/SVE2/shsubr.s
  test/MC/AArch64/SVE2/srhadd-diagnostics.s
  test/MC/AArch64/SVE2/srhadd.s
  test/MC/AArch64/SVE2/uhadd-diagnostics.s
  test/MC/AArch64/SVE2/uhadd.s
  test/MC/AArch64/SVE2/uhsub-diagnostics.s
  test/MC/AArch64/SVE2/uhsub.s
  test/MC/AArch64/SVE2/uhsubr-diagnostics.s
  test/MC/AArch64/SVE2/uhsubr.s
  test/MC/AArch64/SVE2/urhadd-diagnostics.s
  test/MC/AArch64/SVE2/urhadd.s

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