On Thu Sep 9 11:59:55 2010 M?ns Rullg?rd wrote: >>> The presence of __sparc_v9__ clearly does not imply we are allowed >>> to use 64-bit registers; __arch64__ does. >> >> __sparc_v9__ means the v9 hardware, __arch64__ means the v9 abi. > >Exactly, and without the v9 ABI we can't use 64-bit registers. We can with v8+ and we do. Michael