Phobos unit testing uncovers a CPU bug

Ali Çehreli acehreli at yahoo.com
Wed Dec 1 20:04:49 PST 2010


Kagamin wrote:

 > It's not me, it's the programmer. He was disgusted that his
 > algorithm produced garbage, which means, the error was
 > unacceptable. Mat be it was 1%, may be 80%, I don't, that was
 > his decision, that the result was unacceptable. The bug
 > description assumes the problem was in the last bit, which
 > means, he wanted precision higher than the machine precision.

This thread is about a bug in a CPU's floating point implementation. 
Regardless of which bit of the floating point representation is 
affected, it's a bug.

Ali


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