IA64 / EM64T

[kyle2]

Hello. I am confused by the separate downloads for IA32 and EM64T. Based on the description of the auto-library selection mechanism, I would expect to be able to compile code with IPP, and have it choose at runtime the best available library for the processor in use, whether it happens to be a Pentium III, 4, D, Xeon, dual core, whatever. But there are separate downloads for 32 and 64; and they have different library names; and for that matter I have been unable to get the sample programs (Jpegview, for example) to work with the EM64T version at all. The samples want ippcore-5.1.dll, while the 64 bit version of that is ippcoreem64t-5.1.dll.

So it seems likely that I have totally missed some aspect of the 32 / 64 issue. Is there a page or document what describes it?

One caveat is that I am evaluating at this point, I haven't purchased yet. I'll probably purchase tomorrow, just to see what additional / different files come with the real thing. For example, the static libraries appear to be missing entirely from the eval download.

[Vladimir_Dudnik]

Hello,

you are right about static libraries. Evaluation version of IPP does not include static libraries. You can get it only in full version of IPP.

32-bit executable (for example, JPEGView sample, built for 32-bit OS) will be able to run on EM64T and Itanium systems. Please check if 32-bit IPP DLLs are available for executable at run-time.

But, 64-bit executable (for example, JPEGView built for EM64T or Itanium OS), of course will not be able to run 32-bit OS.

To summarize,
1. to run 32-bit IPP-based executable on 64-bit OS, you need to make 32-bit IPP DLLs available

2. to run 64-bit IPP-based executable on 64-bit OS, you need to make appropriate 64-bit DLLs available (do not mix Itanium and EM64T DLLs)

3. you can't run 64-bit executable on 32-bit OS

Hope it help,
Vladimir