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- Path: sparky!uunet!portal!cup.portal.com!Joe_L_Martin
- From: Joe_L_Martin@cup.portal.com
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: What difference 68881 vs Motorola FFP routines?
- Message-ID: <71566@cup.portal.com>
- Date: Sat, 12 Dec 92 07:12:28 PST
- Organization: The Portal System (TM)
- References: <1992Dec11.210030.5624@vicorp.com>
- Lines: 14
-
- >
- >Please, does anyone have an idea of how fast math operations can be done with
- a
- >68881 as compared to the Motorola fast floating point routines? I'm
- >only seeing about a 20% speed increase which hardly makes it worthwhile
- >to buy a co-processor unless precision is necessary. Please reply via email.
- >ron@vicorp.com or uunet!vicorp!ron
- >
- Ron,
- I to saw the same sort of speed increase when I first compiled with 881
- cpu option. Sorry to say that's about all yu can expect, I thought it was
- going to be blazingly fast but well you know. 881 code is the way to go for
- precision only when IEEE would have to be used otherwise. This goes to show
- you how fast FFP is cmpared with IEEE.
-