EM64T: Difference between revisions
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* 64-bit wide general purpose registers (16 - added R8-R15) |
* 64-bit wide general purpose registers (16 - added R8-R15) |
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* 64-bit integer support |
* 64-bit integer support |
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* Up to 1 |
* Up to 1 teribyte (TiB) of platform address space |
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Currently physical addresses are restricted to 40 bits, and linear addresses are restricted to 48 bits, sign-extended. |
Currently physical addresses are restricted to 40 bits, and linear addresses are restricted to 48 bits, sign-extended. |
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Revision as of 04:28, 22 January 2011
Intel Extended Memory 64 Technology (Intel EM64T) enables 64-bit computing on the server/workstation and desktop platforms when combined with supporting software. Intel EM64T improves performance by allowing the system to address more than 4 GB of both virtual and physical memory.
Technically speaking, EM64T offers to Intel processors what x86-64 offers to AMD processors. Ancient disagreements such as 3Dnow-vs-SSE still holds, but the rest should be exactly the same. It is supported by latest XEON processors.
Intel EM64T provides support for:
- 64-bit flat virtual address space
- 64-bit pointers
- 64-bit wide general purpose registers (16 - added R8-R15)
- 64-bit integer support
- Up to 1 teribyte (TiB) of platform address space
Currently physical addresses are restricted to 40 bits, and linear addresses are restricted to 48 bits, sign-extended.
See Also
Articles
External Links
- EM64T on Wikipedia.
- XEON manual