Comment on Why Registers Are Fast and RAM Is SlowparentComments−joosters12yThat's definitely another factor. Again though, I doubt it's the limiting one. No-one (as far as I know) has produced a power-hungry CPU with (say) 5000 registers on it.−terrymah12yI've heard that modern Intel processors have 100 < x < 200 physical registers. I'm not sure they actually document the exact number.−hornetblack12yItanium has at least 256. (128 Integer + 128 Float + 128 predicate (1 bit), which are essentially flip-flops.)
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That's definitely another factor. Again though, I doubt it's the limiting one. No-one (as far as I know) has produced a power-hungry CPU with (say) 5000 registers on it.
I've heard that modern Intel processors have 100 < x < 200 physical registers. I'm not sure they actually document the exact number.
Itanium has at least 256. (128 Integer + 128 Float + 128 predicate (1 bit), which are essentially flip-flops.)