[cfe-dev] __builtin_shufflevector

[Eli Friedman]

On Fri, Feb 13, 2009 at 6:40 AM, VanDung To <vandungto at gmail.com> wrote:
> In the Clang language extensions documentation, there's a heading for a
> builtin function called __builtin_shufflevector but no description.  Have
> this feature been implemented and could someone help me with a description?

Yes, it's implemented; it's roughly the equivalent of the LLVM
shufflevector instruction.  The first two arguments are vectors, then
the remaining arguments are the indices used for the returned vector.

-Eli