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> Transmeta style VLIW+JIT frontend seem to be viable, but I think they are as vulnerable to spectre as OoO CPUs. Transmeta's CPUs were in-order VLIW. The in-o
by wolfgke 8y ago
> Transmeta style VLIW+JIT frontend seem to be viable, but I think they are as vulnerable to spectre as OoO CPUs.
Transmeta's CPUs were in-order VLIW. The in-order property at least makes them at least less prone to Spectre-like vulnerabilities, just like the CPU used in the Raspberry Pi which is also in-order:
> https://www.raspberrypi.org/blog/why-raspberry-pi-isnt-vulnerable-to-spectre-or-meltdown/ https://www.raspberrypi.org/blog/why-raspberry-pi-isnt-vulne...
- gpderetta 8y agoNvidia Denver, which is basically an evolution of transmeta technology, appears to be vulnerable to spectre. It doesn't matter that the underlying cpu is in order if the cpu+runtime pair implement a deep out of order speculative engine.