[Bug web/46031] New: Atomic Builtins page should indicate that 16-byte compare-and-swap is available with -mcex16

[justin.lebar+bug at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46031

           Summary: Atomic Builtins page should indicate that 16-byte
                    compare-and-swap is available with -mcex16
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: web
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: justin.lebar+bug@gmail.com


The atomic builtins page doesn't indicate that gcc supports 16-byte
compare-and-swap instructions.  But gcc does in fact support this instruction,
so the page should indicate that the functionality can be enabled with -mcex16
(or, presumably, with the appropriate -march flag).

http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html