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SuperH and RISC-V and ARM are instruction sets, not microprocessors. The performance per Watt depends on the specific microprocessor architecture, the physical
by pjscott 6y ago
SuperH and RISC-V and ARM are instruction sets, not microprocessors. The performance per Watt depends on the specific microprocessor architecture, the physical manufacturing technology, etc., much more than the instruction set.
- antattack 6y agoThanks. I assumed that ISA influences architecture more because there are ARM IoT processors but not X86.
- klelatti 6y agoI think that it's actually not an unreasonable question and the prior answer was a little short! For example ARM has different ISAs depending on the application: A for more complex Application processors, R for Realtime and M for Microcontroller. The ISA for M is less complex, less complex to implement and likely to use less power than A (or than a full x86 implementation). Not an expert but from what I've seen Super-H seems like a good candidate for a low power applications.
- freemint 6y agoThere definitely is an influence but the margin of ISA on power consumption are much smaller than what differentiation inside an ISA using engineering allows for. An ULTRASPARC with a huger register window is never going to be powesaving compared to an Atom but an i9 thread can eat more than an ULTRASPARC II as Intel is currently keen on showing.
- userbinator 6y agobecause there are ARM IoT processors but not X86. Intel did try... https://en.wikipedia.org/wiki/Intel_Quark https://en.wikipedia.org/wiki/Intel_Quark