Comment 23 for bug 411439

@Mike & David: I have proposed deprecating SPARC V8 support entirely as part of the fix for bug 502696.

@Robert: The fastest SPARCstation 5 ever made ran at 170MHz and the 170MHz doesn't even run on Linux as it doesn't support the Fujitsu TurboSPARC (for whatever reason).

To put this in perspective, I tried to today to run Firefox on a multi-core 400MHz UltraSparc-II system (significantly faster clock rate and 3 times as many instructions per cycle). Technically speaking, it was usable, but 30 seconds to render "google.com" is not encouraging.

Besides which, NativeSparc.cpp already emits V9 instructions. So assuming that the CPU in use is an ultrasparc is completely safe.