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Memory mapping/bank switching was fairly common on 8-bit and 16-bit systems, where a small memory window was used to select different memory banks, allowing a program to access mor…

> There are only a handful of different instructions that account for 90% of all operations executed, and, near the top of that list are addition and subtraction. On ARM these can …

Yes, Turbo Pascal 5.0 introduced those features in 1988. https://www.youtube.com/watch?v=UNx4dxXptUg

Virtualize macOS 26 for testing purposes: https://eclecticlight.co/2025/01/21/what-can-you-do-with-vir...

It still is. The CPU's register renamer can detect these instructions to not have data dependencies and can zero the register itself. It doesn't send the instruction to the executi…

The "Performance Improvements in .NET" blog lists the new JIT support for instruction sets each year. https://devblogs.microsoft.com/dotnet/performance-improvemen...

Also supported in .NET 9 * https://devblogs.microsoft.com/dotnet/performance-improvemen... * https://github.com/dotnet/runtime/pull/91227

Maybe http://0x80.pl -- this site features mainly SIMD/SWAR code.

Seems to be reported by Apple and looks a lot like this security update: https://support.apple.com/en-us/HT213906

> "rotate and mask" series of instructions Sounds a lot like the PowerPC's rlwinm instruction. The PowerPC 600 series, part 5: Rotates and shifts https://devblogs.microsoft.com/old…

"rep stosb" has been optimized since Ivy Bridge CPUs. > Beginning with processors based on Ivy Bridge microarchitecture, REP string operation using MOVSB and STOSB can provide both…

* Visualization: https://www.officedaytime.com/simd512e/ * Book: https://link.springer.com/book/10.1007/978-1-4842-4063-2

€49/month at Hetzner. https://www.hetzner.com/dedicated-rootserver/matrix-apple