Best version of 68040.library to use with WinUAE.

[xeron]

Why not just use 020 emulation, since it'll run more or less the same speed as 040 emulation, and support more instructions? :-?

[xeron]

whabang wrote:
040 optimized apps run faster... (just a little)

Errmm.. under emulation? It shouldn't make any difference.

[xeron]

Karlos wrote:
Whilst I don't pretend to understand why, this isn't my experience at all. 68040 optimised code runs about 5% faster on my installation of UAE running in 040 mode than the 020/882 optimised version of the same code in 020+68882 emulation mode.

Run the 040 code on the 020/882 emulation mode and see if it makes any difference.

[xeron]

Karlos wrote:
Basically all I am saying is that on my (old and a bit slow PC) system, 040 optimised code running in 040 emulation mode is measurably faster (sometimes upto 10%) than any other combo I've tried...

How very odd. I personally havent seen the UAE sources, but I can't imagine they're using a different emulation core if you select 040 instead of 020.

I don't know why they don't just emulate a generic "680x0" processor that supports all instructions and addressing modes of the whole range.

[xeron]

I can't understand why the 040 emulation should be any faster. Surely if its a different emulation core, it would be a good idea to just add the missing instructions and use the same core for both so that it runs faster whatever mode you select? :-?