[Bug target/53877] New: __lzcnt_u16/__lzcnt_u32/__lzcnt_u64 aren't implemented

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53877

             Bug #: 53877
           Summary: __lzcnt_u16/__lzcnt_u32/__lzcnt_u64 aren't implemented
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: hjl.to...@gmail.com
                CC: kirill.yuk...@intel.com, ubiz...@gmail.com


Intel AVX spec specifies __lzcnt_u16/__lzcnt_u32/__lzcnt_u64
intrinsics.  They aren't implemented in GCC.