Re: 64-bit-ness?

[Mouse <mouse%Rodents-Montreal.ORG@localhost>]

>> I don't know why [a particular CPU's support for Intel64 is] not
>> reflected in the cpuctl identify output; it seems like it should
>> be...
> I just looked at the code, in case maybe the bit is set and it just
> isn't getting printed, and it looks to me as though it should be
> printed if it's set (i386/i386/identcpu.c does have a clause that
> uses CPUID_FLAGS4 if any of the feature3 bits are set).

I just found another machine which _does_ advertise it, and yes, the
code is capable of reporting EM64T:

cpu0: Intel (686-class), 2800.34 MHz, id 0xf64
cpu0: features bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features bfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu0: features bfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,SBF>
cpu0: features2 e49d<SSE3,MONITOR,DS-CPL,EST,CID,xTPR>
cpu0: features3 20100000<XD,EM64T>
cpu0: "Intel(R) Pentium(R) D CPU 2.80GHz"

That's the same OS rev as the one I quoted before which didn't print
it.  Also, I got a chance to test another machine today.  It advertises
SSE3 but does not boot the amd64 installer CD and thus presumably does
not actually support 64-bit:

cpu0: Intel (686-class), 3215.68 MHz, id 0xf34
cpu0: features bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features bfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu0: features bfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,SBF>
cpu0: features2 441d<SSE3,MONITOR,DS-CPL,CID,xTPR>
cpu0: "Intel(R) Pentium(R) 4 CPU 3.20GHz"

So I guess it's generally EM64T, but with some, presumably only a few,
processors not reporting themselves as EM64T-capable even though they
actually are.

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