[all-commits] [llvm/llvm-project] 151fad: [RISCV][MC] Support experimental Zvabd instructions

[Pengcheng Wang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 151fadecd15b8c0b2f233b0df4292776a093ee19
      https://github.com/llvm/llvm-project/commit/151fadecd15b8c0b2f233b0df4292776a093ee19
  Author: Pengcheng Wang <wangpengcheng.pp at bytedance.com>
  Date:   2026-02-09 (Mon, 09 Feb 2026)

  Changed paths:
    M clang/test/Driver/print-supported-extensions-riscv.c
    M clang/test/Preprocessor/riscv-target-features.c
    M llvm/docs/RISCVUsage.rst
    M llvm/docs/ReleaseNotes.md
    M llvm/lib/Target/RISCV/RISCVFeatures.td
    M llvm/lib/Target/RISCV/RISCVInstrInfo.td
    A llvm/lib/Target/RISCV/RISCVInstrInfoZvabd.td
    M llvm/test/CodeGen/RISCV/attributes.ll
    M llvm/test/CodeGen/RISCV/features-info.ll
    A llvm/test/MC/RISCV/rvv/zvabd-invalid.s
    A llvm/test/MC/RISCV/rvv/zvabd.s
    M llvm/unittests/TargetParser/RISCVISAInfoTest.cpp

  Log Message:
  -----------
  [RISCV][MC] Support experimental Zvabd instructions

The `Zvabd` is for `RISC-V Integer Vector Absolute Difference` and
it provides 5 instructions:

* `vabs.v`: Vector Signed Integer Absolute.
* `vabd.vv`: Vector Signed Integer Absolute Difference.
* `vabdu.vv`: Vector Unsigned Integer Absolute Difference.
* `vwabda.vv`: Vector Signed Integer Absolute Difference And Accumulate.
* `vwabdau.vv`: Vector Unsigned Integer Absolute Difference And Accumulate.

Doc: https://github.com/riscv/integer-vector-absolute-difference

Reviewers: topperc, lukel97, preames, tclin914, asb, kito-cheng, mshockwave

Pull Request: https://github.com/llvm/llvm-project/pull/180139



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