Re: Floating point inaccuracies
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- Subject: Re: Floating point inaccuracies
- From: Andrew Lentvorski <bsder@...>
- Date: 2010年11月28日 14:41:00 -0800
On 11/28/10 1:28 PM, Patrick Rapin wrote:
This sort of problems, not directly related to Lua but to the IEEE 754
floating point standard, comes up regularly to the list.
Wouldn't be possible to find a more generic solution?
1) Switch to Decimal Floating Point: http://speleotrove.com/decimal/
2) Cram Goldberg down the throat of everyone who asks:
"What Every Computer Scientist Should Know About Floating Point Arithmetic"
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.22.6768
Is that generic enough? :-)
Oddly, Decimal Floating Point works very well on 32-bit embedded systems
without floating point units (like ARM or MIPS). A decimal floating
point library is generally no slower (and often faster) than a
corresponding binary floating point library and converting to/from text
requires way less code, less working memory, less uncertainty and is
generally faster to boot.
-a