English Amiga Board - View Single Post - xmaplay - My asm port of FT2's XM replayer for 68020+ Amigas

8bitbubsy · 10 November 2022, 20:57

So moving the D2 change code did make a speed improvement!
movem -> move+ext however, turned out to not be any faster (but also not slower). Didn't try it for the 16-bit mixer, as it would require 2x move and 2x ext, which I assume will be slower.

I released a new version (w/ source) with the optimizations. If I were to guess, it should be around 1-4% faster.
https://16-bits.org/etc/xmaplay060_v041.zip

I spent a lot of time shuffling code around, and this is the fastest I could get it (even if it may look like more stuff should go inbetween D2 change and D2 use).

10 November 2022, 20:57	#31
8bitbubsy Registered User Join Date: Sep 2009 Location: Norway Posts: 1,712	So moving the D2 change code did make a speed improvement! movem -> move+ext however, turned out to not be any faster (but also not slower). Didn't try it for the 16-bit mixer, as it would require 2x move and 2x ext, which I assume will be slower. I released a new version (w/ source) with the optimizations. If I were to guess, it should be around 1-4% faster. https://16-bits.org/etc/xmaplay060_v041.zip I spent a lot of time shuffling code around, and this is the fastest I could get it (even if it may look like more stuff should go inbetween D2 change and D2 use). Last edited by 8bitbubsy; 10 November 2022 at 21:46.