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Tag Archives: C
CLZ – The Integer Log Base 2 Instruction
In just a few CPU instructions, the truncated base 2 logarithm of any integer can be computed for any integer from -2^63 … 2^63 – 1. This has interesting applications in being able to rapidly access logarithmically increasing arrays. The … Continue reading
Posted in programming
Tagged builtin, C, clz, clzll, gcc, integer, logarithm, programming
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Baker Proof of Concept on GitHub
The first proof of concept of my latest hack project is available on GitHub: https://github.com/jimbelton/baker This program (written in python) is able to automatically build a simple C library and its test program. The tool requires little to no configuration … Continue reading
Posted in programming
Tagged automation, baker, build, C, c libraries, c programs, github, programming, python, tool
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Hash Table Shootout on GitHub
NOTE: Since I wrote this article, I fixed some bugs in the benchmarks and regenerated the graphs. The updated article is here: Hash Table Shootout Updated I forked Nick Welch’s hash table shootout benchmark, got it all working, and updated … Continue reading
Datatypes Used in libsxe: 64 Bit Programming
libsxe uses standard C data types, but it is very careful to use them intentionally. We normally use the following types: Type | Defined | Description —————+————-+———————————— bool | <stdbool.h> | Boolean values (true and false) char | C standard … Continue reading
High Speed Fine Grained Diagnostic Logging
The sxe-log package of the libsxe library (see libsxe.org) has always had macro based logging with a decent feature set: Trace and dump level messages compiled out in non-debug builds In-line level checking for absolutely minimal performance impact when level … Continue reading
Posted in libsxe, programming
Tagged atomic, C, libsxe, logging, performance, programming
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Why is libsxe Written in C and not C++?
As one of the core developers of the libsxe open source library, I thought I’d write a blog post explaining our choice of C for the library. We eliminated interpreted languages, including java, based on the requirement to be able … Continue reading
Posted in libsxe, programming
Tagged C, libsxe, memory allocation, programming, RAII
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