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Re: [avr-libc-dev] more accuracy...

From: Björn Haase
Subject: Re: [avr-libc-dev] more accuracy...
Date: Mon, 24 Apr 2006 00:25:32 +0200
User-agent: KMail/1.7.1

David Carr wrote on Montag, 24. April 2006 09:37 :
> Just as a point of reference:
> Execution times for the aforementioned benchmark
> 386 (with 387 co-processor) @ 33MHz
> .67s
> 486DX2 66MHz
> .121s
> Considering that the AVR is 8bit and has no hardware floating point, being
> only 12x slower than the 386 is impressive especially considering it runs
> at 1/5 the clock speed.
you are sure that the two PC results were obtained with true float 
calculations? Otherwise the comparison would not be fair :.). I'd assume that 
probably the tan/log/sqrt functions operate on doubles.?

Never the less: the FP emulation for AVR *is* quite efficient.


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