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I've been looking at this website:

But I can't figure out the number of registers.

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SIMD is an extension to the cpus since the need for sound and graphics just in case u dont know :) – Platwnas Slipknot Jun 1 at 22:54

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That's kind of an unusual question when evaluating an individual processor, as the number of registers is generally defined at the architectural level.

There are 16 general purpose registers in the x86-64 architecture. Could you perhaps be more specific as to your question?

x86-64 registers

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16 registers per core? – mdpc Apr 19 '13 at 20:21
There are also 16 SIMD registers and 8 x87 registers. The number of physical registers is also different as there are rename registers to support out-of-order execution. – Paul A. Clayton Apr 19 '13 at 21:31

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