[PATCH] D137026: [X86] Use GFNI for vXi8 shifts/rotates

[Phoebe Wang via Phabricator via llvm-commits]

pengfei added inline comments.


================
Comment at: llvm/lib/Target/X86/X86ISelLowering.cpp:29935
+    return (getGFNICtrlImm(ISD::SRL, Amt) |
+            ((0x8080808080808080ULL >> (64 - (8 * Amt))) & (0ULL - (Amt > 0))));
+  case ISD::ROTL:
----------------
`Amt > 0 && Amt < 8`?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137026/new/

https://reviews.llvm.org/D137026