[LLVMdev] [PATCH] x86: disambiguate unqualified btr, bts

Ramkumar Ramachandra artagnon at gmail.com
Wed Jul 10 13:44:39 PDT 2013

Jim Grosbach wrote:
> Also, please elaborate on why this is a good change. Because gas accepts it
> isn’t sufficient reason in and of itself.

That they're valid instructions isn't sufficient reason?  Should I
additionally say that linux.git uses them?

I wrote:
> The instructions btr and bts are perfectly valid, and have existed since
> Intel 386.

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