[all-commits] [llvm/llvm-project] 2253d7: [PowerPC] Add builtins for Post Quantum Cryptograp...

[Lei Huang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2253d7575a52918b37012e20d2fa5d6758bc8017
      https://github.com/llvm/llvm-project/commit/2253d7575a52918b37012e20d2fa5d6758bc8017
  Author: Lei Huang <lei at ca.ibm.com>
  Date:   2026-04-17 (Fri, 17 Apr 2026)

  Changed paths:
    M clang/include/clang/Basic/BuiltinsPPC.def
    M clang/lib/Headers/altivec.h
    A clang/test/CodeGen/PowerPC/builtins-post-quantum-crypto.c
    A clang/test/Sema/PowerPC/builtins-post-quantum-crypto-error.c
    M llvm/include/llvm/IR/IntrinsicsPowerPC.td
    M llvm/lib/Target/PowerPC/PPCInstrFuture.td
    A llvm/test/CodeGen/PowerPC/post-quantum-crypto.ll

  Log Message:
  -----------
  [PowerPC] Add builtins for Post Quantum Cryptography Acceleration (#184717)

This patch implements Post Quantum Cryptography (PQC) Acceleration
builtins for PowerPC's future ISA by ensuring that vector operations
(vec_add, vec_sub, vec_mul, vec_mulh) correctly map to VSX instructions
(xvadduwm, xvadduhm, xvsubuwm, xvsubuhm, xvmuluwm, xvmuluhm, xvmulhsw,
xvmulhsh, xvmulhuw, xvmulhuh) when targeting mcpu=future.

Implement new builtin for vec_mulh:
* vector short vec_mulh(vector signed short, vector signed short)
* vector unsigned short vec_mulh(vector unsigned short, vector unsigned
short)

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