[PATCH] D47310: [AArch64][SVE] Asm: Support for ADD (immediate) instructions.

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen created this revision.
sdesmalen added reviewers: rengolin, fhahn, samparker, SjoerdMeijer.
Herald added a reviewer: javed.absar.
Herald added subscribers: rkruppe, kristof.beyls, tschuett.

This patch adds addsub_imm8_opt_lsl_(i8|i16|i32|i64) operands
that are unsigned values in the range 0 to 255. For element widths of
16 bits or higher it may also be a signed multiple of 256 in the
range 0 to 65280.

Note: This also does some refactoring to reuse convenience function
getShiftedVal<shift>(), and now allows AArch64 scalar 'ADD #-4096' to be
accepted to be mapped to SUB #4096.


https://reviews.llvm.org/D47310

Files:
  lib/Target/AArch64/AArch64SVEInstrInfo.td
  lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
  lib/Target/AArch64/MCTargetDesc/AArch64AddressingModes.h
  lib/Target/AArch64/SVEInstrFormats.td
  test/MC/AArch64/SVE/add-diagnostics.s
  test/MC/AArch64/SVE/add.s
  test/MC/AArch64/SVE/sub-diagnostics.s
  test/MC/AArch64/SVE/sub.s
  test/MC/AArch64/alias-addsubimm.s
  test/MC/AArch64/basic-a64-diagnostics.s

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