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clickhouse.com | ||
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ashvardanian.com
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| | | | | David Patterson had recently mentioned that (rephrasing): The programmers may benefit from using complex instruction sets directly, but it is increasingly challenging for compilers to automatically generate them in the right spots. In the last 3-4 years I gave a bunch of talks on the intricacies of SIMD programming, highlighting the divergence in hardware and software design in the past ten years. Chips are becoming bigger and more complicated to add more functionality, but the general-purpose compilers like GCC, LLVM, MSVC and ICC cannot keep up with the pace. Hardly any developer codes in Assembly today, hoping that the compiler will do the heavy lifting. | |
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www.nayuki.io
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| | | | | [AI summary] The user has provided a comprehensive overview of the x86 architecture, covering topics such as basic arithmetic operations, control flow with jumps and conditionals, memory addressing modes, the stack and calling conventions, advanced instructions like SSE, virtual memory, and differences between x86-32 and x86-64. The user is likely looking for a summary or clarification of the x86 architecture, possibly for learning purposes or to reinforce their understanding. | |
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www.bazhenov.me
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| | | | | Introduction Link to heading Varint is a widely recognized technique used for compressing integer streams. Essentially, it suggests that it can be more efficient to encode a number using a variable-length representation instead of a fixed-size binary representation. By removing leading zeros from the binary number, the overall representation size can be reduced. This technique works particularly well for encoding smaller numbers. In this article, I provide a brief introduction and rationale for varint encoding. Additionally, I describe the Stream VByte format, which enables fully vectorized decoding through SSSE3 instructions. I also share my findings from implementing this algorithm in Rust, which includes both encoding and decoding primitives and the abili... | |
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comsecuris.com
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| | | [AI summary] This blog post discusses a detailed exploit chain targeting a mobile phone's application processor OS through a compromised modem. The author outlines the process of identifying vulnerabilities in the baseband firmware, reverse engineering the MT6795's cellular stack layers, and attempting to fuzz the MM layer for potential memory corruption issues. The post also touches on the challenges of creating a persistent rootkit via the modem and the importance of hardware isolation in securing mobile platforms. | ||
