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- Newsgroups: comp.sys.amiga.programmer
- References: <38232041@kone.fipnet.fi> <30fb2659@canit.se>
- From: "Frank Wille" <frank@phoenix.owl.de>
- Date: Thu, 18 Jan 1996 21:22:07 +0200
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- Subject: Re: FPU and games?
- Message-ID: <42116441@phoenix.owl.de>
- Organization: Phantasm
-
- Andreas Fredriksson wrote on 15 Jan 96 22:15:21 CET
- about "FPU and Games?" :
-
-
- AF> Jyrki Saarinen (jsaarinen@kone.fipnet.fi) wrote regarding 'FPU and
- AF> games?':
- AF>
- AF> [...]
- AF>
- AF> JS> The only place I could think of FPU being useful is 3d
- AF> JS> transformations which contain very much multiplyings. 040 fmul is
- AF> JS> only 5 cycles, but fadd is slower than normal add.
- AF>
- AF> JS> Then again, the real problem is that the 68040 does not have fint
- AF> JS> (float to integer) instruction in hardware, so it is trapped and
- AF> JS> emulated
- AF> JS> -->áVERY slow.
- AF>
- AF> How about the 68060?
-
- fint and fintrz are indeed realized in hardware.
-
-
- -- _
- _ // Frank EMail: frank@phoenix.owl.de
- \X/ IRC: Phx @ #amiga(ger)
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