------- Additional Comments From schwab at suse dot de 2004-11-03 23:44 ------- Even the 68020 should already show slight improvement when using 4 byte aligment due to the 32 bit data bus (the 68000/010 only have a 16 bit data bus). Adding an aligned attribute to the _Atomic_int type doesn't help for automatic variables as gcc limits the alignment to STACK_BOUNDARY. But it will work for static variables. About the ABI change you are of course safe if everything is using the changed aligment (including the interface to the RTEMS kernel).
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17627
