That power efficiency is a direct result of the instructions. Namely smaller chips due to the reduced instructions set, in contrast to x86’s (legacy bearing) complex instruction set.
All else being equal, a complex decoding pipeline does reduce the efficiency of a processor. It’s likely not the most important aspect, but eventually there will be a point where it does become an issue once larger efficiency problems are addressed.
Well, not exactly. You have to remove instructions at some point. That’s what Intel’s x86-S is supposed to be. You lose some backwards compatibility but they’re chosen to have the least impact on most users.
Yes I understand that and agree, but the reason x86 dominated is because of those QoL instructions that x86 has. On arm you need to write more code to do the same thing x86 does, OTOH, if you don’t need to write a complex application, that isn’t a bad thing.
You don’t need to write more code. It’s just that code compiles to more explicit/numerous machine instructions. A difference in architecture is only really relevant if you’re writing assembly or something like it.
Sorry, I should have been more specific. I am talking about assembly code. I will again state that I am pro-arm, and wish I was posting this from an arm laptop running a distro.
That power efficiency is a direct result of the instructions. Namely smaller chips due to the reduced instructions set, in contrast to x86’s (legacy bearing) complex instruction set.
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All else being equal, a complex decoding pipeline does reduce the efficiency of a processor. It’s likely not the most important aspect, but eventually there will be a point where it does become an issue once larger efficiency problems are addressed.
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Well, not exactly. You have to remove instructions at some point. That’s what Intel’s x86-S is supposed to be. You lose some backwards compatibility but they’re chosen to have the least impact on most users.
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Instruction decoding takes space and power. If there are fewer, smaller transistors dedicated to the task it will take less space and power.
Yes I understand that and agree, but the reason x86 dominated is because of those QoL instructions that x86 has. On arm you need to write more code to do the same thing x86 does, OTOH, if you don’t need to write a complex application, that isn’t a bad thing.
You don’t need to write more code. It’s just that code compiles to more explicit/numerous machine instructions. A difference in architecture is only really relevant if you’re writing assembly or something like it.
Sorry, I should have been more specific. I am talking about assembly code. I will again state that I am pro-arm, and wish I was posting this from an arm laptop running a distro.