[uae] Re: 68060 and JIT

  • From: Toni Wilen <twilen@xxxxxxxxxx>
  • To: uae@xxxxxxxxxxxxx
  • Date: Thu, 04 Nov 2004 12:04:50 +0200

I've just downloaded e-uae 0.8.27 RC2 and I've got a little problem with 68060 emulation - it seems I cannot enable JIT together with 68060, so it works terribly slow. For example, SysInfo sais, that with 68040 emulation and no JIT the CPU speed is similar to A4000, with 68040+JIT it's about 30 times faster. 68060 emulation works always with A4000 speeed, whether I enable JIT or not.

There is no working 68060 emulation yet. "68060"-cpu setting is only simple experiment that fools CPU detection programs to see 68060 instead of 68040, also FPU is not working correctly in "68060" mode.

Anyway, emulation of 68060 is mostly pointless. (68060 == 68040 minus some FPU instructions plus couple of new special 68060 mode-setting instructions)

Other related posts: