Phil Endecott wrote:
Is it time to raise the idea of a Boost fixed-point library again?
A long time ago, I read https://ccrma.stanford.edu/~bilbao/master/goodcopy.html The developed methods were also analyzed in a fixed-point context. But trying to think about fixed-point numbers, I soon realized that I don't even understand the basics, like negative numbers or multiplication. I think I did a web search at that time, but wasn't able to find much introductory material. However, I just did a web search again, and there was an extensive Wikipedia article on the subject, with many interesting references. I found the following in the first reference:
While there is nothing particularly difficult about this subject, I found little documentation either in hardcopy or on the web. What documentation I did find was disjointed, never putting together all of the aspects of fixed-point arithmetic that I think are important. I therefore decided to develop this material and to place it on the web not only for my own reference but for the benefit of others who, like myself, find themselves needing a complete understanding of the issues in implementing fixed-point algorithms on platforms utilizing integer arithmetic.
So perhaps it was really difficult to find introductory material on the web a long time ago, but the situation seems to have changed in the meantime. (Perhaps I will read some of the introductory material when I find time.) I also read the following on Wikipedia:
ISO/IEC TR 18037[5] specifies fixed-point data types for the C programming language; vendors are expected to implement the language extensions for fixed point arithmetic in coming years. Fixed-point support is implemented in GCC.[6][7]
This looks like fixed-point support will really become "mainstream" soon. How is this related to C++ and the idea of a Boost fixed-point library? Regards, Thomas