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From: raveling@vaxb.isi.edu (Paul Raveling)
Newsgroups: comp.graphics,comp.windows.x
Subject: Re: Luminance from RGB
Message-ID: <7280@venera.isi.edu>
Date: 17 Jan 89 02:04:17 GMT
References: <572@midgard.Midgard.MN.ORG> <10322@well.UUCP> <7266@venera.isi.edu>
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In article <7266@venera.isi.edu> raveling@vaxb.isi.edu (Paul Raveling) writes:
>
>	Next, maybe tomorrow, I'll try the same stuff with some
>	hand coded assembly language.  It should be easy to beat
>	the compiler by LOTS.
>

	Here's the result of using hand coded assembly language
	for the "table" algorithm:

	Test		Raw Timing	Less Overhead
	----		----------	-------------

	C version	   34.9		     16.1
	Assembly version   10.2		      6.4


	Anyone have a better C compiler?

	If anyone would like to check this hacked assembly version
	on other systems, let me know.  I can either email it or
	post it, but should take a few minutes to clean the source
	up a little & stick in warnings that very few 68K assemblers
	use identically the same source syntax.


---------------------
Paul Raveling
Raveling@vaxb.isi.edu