[llvm] Perform bitreverse using AVX512 GFNI for i32 and i64. (PR #81764)
Phoebe Wang via llvm-commits
llvm-commits at lists.llvm.org
Thu Feb 15 01:28:54 PST 2024
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@@ -1845,6 +1845,10 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
setOperationAction(ISD::UMULO, MVT::v64i8, Custom);
setOperationAction(ISD::BITREVERSE, MVT::v64i8, Custom);
+ if (Subtarget.hasGFNI())
+ for (auto VT : {MVT::i32, MVT::v4i32, MVT::v8i32, MVT::v16i32, MVT::i64,
+ MVT::v2i64, MVT::v4i64, MVT::v8i64})
+ setOperationAction(ISD::BITREVERSE, VT, Custom);
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phoebewang wrote:
Traditionally we need to change `hasVLX` for 128/256-bits vectors. I think we can loose the check now @RKSimon ?
https://github.com/llvm/llvm-project/pull/81764
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