[PATCH] D84592: [X86] Add custom lowering for llvm.roundeven with sse4.1.

[Serge Pavlov via Phabricator via llvm-commits]

sepavloff added inline comments.


================
Comment at: llvm/lib/Target/X86/X86ISelDAGToDAG.cpp:1026
+      case ISD::STRICT_FROUNDEVEN:
+      case ISD::FROUNDEVEN: Imm = 0x8; break;
       case ISD::STRICT_FNEARBYINT:
----------------
Should it be 0?
>From ROUNDSS description:
```
Precision (signaled only if imm[3] = ‘0; if imm[3] = ‘1, then the Precision Mask in the MXSCSR is ignored and precision
exception is not signaled.)
```


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D84592/new/

https://reviews.llvm.org/D84592