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Reply-To: "Kevin Aylward"
From: "Kevin Aylward"
References: <firstname.lastname@example.org> <01c2b41a$cafe2d80$a893eb41@stupidwin95>
Subject: Re: To C or not to C
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Date: Sun, 5 Jan 2003 09:33:33 -0000
NNTP-Posting-Date: Sun, 05 Jan 2003 09:33:40 GMT
Kevin G. Rhoads wrote:
>> One final note: you would be surprised how much you can do without
>> floating point math. Eliminating this from your C library will save
>> lots of room in projects where code size is critical. Smaller and
>> faster scalable long-integer functions (included in the Dunfield
>> suite) will often take care of most higher precision math when
> Alan Turing is said to have been strongly opposed to the
> use of floating point math, and felt that scaled fixed point
> was more than adequate for all needs.
Then he would be wrong.
After all, if you
> did not understand how your numbers would be scaling
> through the intermediate calculations, you would likely
> be throwing precision away, often to the point of getting
> meaningless results. It is amazing to me how insightful
> this seems when I look at all the posts in comp.lang.fortran
> or sci.math.num-analysis &c where people get meaningless
> results due to ill-advised algorithms and then want quad-precision
> floating point just to save a digit or two of meaningful result.
> Floating point is MUCH more convenient AT FIRST,
Just as it is all the time if you are writing *generalized* mathematical
The idea of not using floating point for certain types of mathematical
software, e.g. spice, mathcad etc is plain daft. Indeed, you want higher
levels mathematical constructions, e.g. a class for complex numbers to
further reduce the details of routine multiplication and division. There
is simple far to much going in in these types of programs to bother
pissing about with something as basic as what a number is.
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.
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