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Author Topic: mp3 encoding without an FPU  (Read 1453 times)

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Offline olegil

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Re: mp3 encoding without an FPU
« on: May 15, 2003, 09:13:26 PM »
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Karlos wrote:
I dunno really.

You could always get some existing source and compile it yourself to use the amiga math libraries.
Pity, a lot of 68060 stuff assumes FPU and with good reason - the FPU in the 68060 is damn fast compared to any other 680x0. So much so that it even gets used for some integer calcs too (especially 64-bit mult/div emulation).



Not too odd, considering the 68060 doesn't have hardware mul64/div64, unlike the 020-040 CPU's. Running those via 68060.library really doesn't cut the mustard. :-)
 

Offline olegil

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Re: mp3 encoding without an FPU
« Reply #1 on: May 15, 2003, 09:20:21 PM »
Yeah, but even if it sucked at floating point it would still make sense running those two instructions in the FPU because the software exception handling sucks even MORE :-)


Edit: Or you could *cough* do it the old way with more 32 bit instructions. But I mean, that would mean engaging brain functions, right?