July 2002
Intermediate to advanced
320 pages
8h 15m
English
Content preview from Hacker's Delight
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15-2. Comparing Floating-Point Numbers Using Integer Operations
One of the features of the IEEE encodings is that non-NAN values are properly ordered if treated as signed magnitude integers.
To program a floating-point comparison using integer operations, it is necessary that the “unordered” result not be needed. In IEEE 754, the unordered result occurs when one or both comparands are NaNs. The methods below treat NaNs as if they were numbers greater in magnitude than infinity.
The comparisons are also much simpler if −0.0 may be treated as strictly less than +0.0 (which is not in accordance with IEEE 754). Assuming this is acceptable, the comparisons may be done as shown below, where and denote floating-point comparisons, and the ≈ symbol ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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