@koakuma I don't know a lot about their SPARC processors, some of the information must be available in the [book](http://www.mcst.ru/doc/book_121130.pdf), half of it is literally about their SPARCs, but it's older R500 and R1000, I suppose they should be somewhat close to UltraSparc III.

Their current SPARC CPU is R2000+, which according to binutils source also borrows and adds unique instructions...