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a day ago
Daniel Lemire's blog
The cost of a function call
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Daniel Lemire's blog
The cost of a function call
When programming, we chain functions together. Function A calls function B. And so forth. You do not have to program this way, you could write an entire program using a single function. It would be a fun exercise to write a non-trivial program using a single…
4 days ago
新员工
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6 days ago
香山团队发布 DDR4 内存控制器 IP “白杨”并开源,性能水平接近商用 IP
https://www.ithome.com/~
IT之家
国产香山团队 DDR4 内存控制器 IP 白杨发布并开源,性能水平接近商用 IP
在功能方面,该团队已经在帕拉丁(Palladium)硬件仿真平台上,成功将“白杨”与香山第三代“昆明湖”处理器核集成,并正常启动了 Linux 操作系统及其他测试应用,证明了其功能的正确性与稳定性。
00:00 · Feb 3, 2026 · Tue
Daniel Lemire's blog
Converting data to hexadecimal outputs quickly
source
Daniel Lemire's blog
Converting data to hexadecimal outputs quickly
Given any string of bytes, you can convert it to an hexadecimal string by mapping the least significant and the most significant 4 bits of byte to characters in 01...9A...F. There are more efficient techniques like base64, that map 3 bytes to 4 characters.…
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