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I'll point out that this is the same way that FPGAs implement arbitrary logic functions, as lookup tables (LUTs).
by kens 2y ago
I'll point out that this is the same way that FPGAs implement arbitrary logic functions, as lookup tables (LUTs).
- tr352 2y agoSo does the 74181 ALU.
- monocasa 2y agoI don't think the 74181 is implemented with a LUT. http://www.righto.com/2017/01/die-photos-and-reverse-engineering.html http://www.righto.com/2017/01/die-photos-and-reverse-enginee...
- kevin_thibedeau 2y agoMost but not all. Actel/Microsemi use a small tree of muxes and gates.
- okanat 2y agoBasically CPUs, GPUs and FPGAs all converge to the crab equivalent of computation. They all expose the same capability with different areas of optimization.
- dreamcompiler 2y agoAll logic can be implemented with memory, and all memory can be implemented with logic (in some sort of feedback configuration). Neither is typically done in practice except for specialized purposes like FPGAs and the instruction described in this article. High-speed registers and static RAM are sometimes built with logic but it's more common to build them directly with transistors than with gates.