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Subject: Re: 64-bit processors

Author: Larry Griffiths

Date: 16:07:40 01/17/01

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On January 17, 2001 at 16:57:00, Terry McCracken wrote:

>Major Snip!
>
>>>http://www.intel.com/eBusiness/products/ia64/faqs/
>>
>>Again, this seems to indicate binary compatablility with IA32 instructions
>>Terry, but I am still wondering if you have to be in some sort of IA32 mode or
>>if you can just execute the instructions while in IA32 mode.  Intel has always
>>maintained hardware instruction compatability with previous generations and I
>>would hope that IA32 code could use IA64 instructions and registers without
>>doing some sort of mode switch or incurring clock cycle penalties.
>>
>>Larry.
>
>I'm also interested in the Itanium Processor, as far as IA32/64 compatability
>goes. But don't know too much in this area. However, I hope these Intel links
>help.
>
>Terry
>
>http://www.intel.com/design/ia-64/index.htm
>
>
>http://www.intel.com/design/ia-64/itanium.htm
>
>
>http://www.intel.com/design/ia-64/microarch_ovw/index.htm
>
>
>http://www.intel.com/design/ia-64/microarch_ovw/sld020.htm

This seems to confirm my initial thoughts that the BSF and BSR instructions
should be available on the Itanium Processor.  Thanks for the Links.

Larry.



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