[Bug tree-optimization/56829] New: Feature request: "generic" builtin for "movemask"

[vincenzo.innocente at cern dot ch]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56829



             Bug #: 56829

           Summary: Feature request: "generic" builtin for "movemask"

    Classification: Unclassified

           Product: gcc

           Version: 4.9.0

            Status: UNCONFIRMED

          Severity: enhancement

          Priority: P3

         Component: tree-optimization

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: vincenzo.innoce...@cern.ch





I would like to ask if is possible to add a builtin for "movemask" instructions

supporting vectors of any size (on the same line of  __builtin_shuffle)

One could call it __builtin_ballot following CUDA syntax

implementing any,all,popcnt is then rather trivial using the existing builtins



The rational is described in PR55645