[PATCH] D125130: [CodeGen] Clarify the semantics of ADDCARRY/SUBCARRY

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> What is meant by "native carry flag" here? X86's carry flag matches the USUBO output.

Sorry, missed a few words.  Meant to say "Explicitly call out that for subtraction, on many targets, the native carry flag is the inverse of what USUBO produces."  x86 is not one of those targets.  AArch64 is.


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  https://reviews.llvm.org/D125130/new/

https://reviews.llvm.org/D125130